bluuebunny/crossref_metadata_2025 huggingface dataset:
Activities of pongid thigh muscles during bipedal behavior
Authors: Tuttle Russell H. , Basmajian John V. , Ishida Hidemi
Published: August 2005

Electromyographic recordings were taken from 12 thigh muscles (or major parts of them) in a gorilla, from 6 thigh muscles in a chimpanzee, and from 2 thigh muscles in an orangutan as they engaged in bipedal positional behavior, including stance, reaching overhead, lunging, leaping and walking.

In the African apes, symmetric bipedal stances with hindlimb flexure were accompanied by notable EMG activity in many of the hamstring, quadriceps, and adductor muscles. If weight shifted eccentrically onto one hindlimb, EMG potentials generally increased to or remained at moderate and high levels. Our studies on the gluteal (Tuttle et al., '78) and thigh muscles of African apes partly confirm Kummer's ('75) prediction that considerable gluteal and hamstring activity would be required in order for them to stand bipedally with flexed hip and knee joints.

The gorilla's thigh muscles exhibited considerable EMG activity during the stance phase and remarkably little activity during the swing phase of bipedal steps. The activity patterns of most thigh and gluteal muscles (Tuttle et al., '78) in the African apes are much more similar to those of bipedal gibbons than to their counterparts in man. The bipedal locomotor cycles of human subjects are accompanied by many more biphasic and triphasic EMG patterns in the thigh muscles than the locomotor cycles of other anthropoid primates are. The evolutionary anthropological significance of these findings should become clearer when they are complemented by EMG studies on human running, arboreal bipedalism and vertical climbing in apes, and central pattern generation in man and apes.
Digital dermatoglyphics of 107 Bengalis
Authors: Morgan Leslie Y.
Published: August 2005

I analyzed the finger prints of 59 male and 48 female unrelated Bengalis in a rehabilitation camp of Dacca, Bangladesh. The most common pattern type in the Bengalis was the ulnar loop (53%), then whorls (40%); arches (5%) and radial loops (2%) were the least common. Radial loops occurred most frequently on the index fingers. I have shown the arch/whorl, whorl/loop, and pattern intensity indices, and I have presented ridge counts by individual digits and by total digital ridge count. Digital dermatoglyphics in the male Bangladeshis were similar to previous findings in male Brahmins of Bengal. However, there were more whorls and arches, fewer loops, and a higher mean total digital ridge count in the female Bangladeshis than in female Brahmins.
Temporal changes in human temporomandibular joint size and shape
Authors: Hinton Robert J. , Carlson David S.
Published: August 2005

Measurements approximating the size of the temporomandibular joint were taken on a series of genetically homogeneous populations from early Nubia, which span almost 10,000 years and embody a shift from a primarily hunting and gathering adaptation to a completely agricultural lifeway. A generalized trend of reduction of temporomandibular joint size was observed. In addition, a decrease in sexual dimorphism was apparent for all measures of joint size; a change primarily mitigated by reductions in male dimensions. The observed variation in size and form of the temporomandibular joint is most likely the result of the reduction in masticatory muscle robusticity and resultant changes in craniofacial form which have been documented for the transition from a hunting and gathering to an agricultural subsistence in Nubia.
Comparative biometrical study of stature and weight of Italian migrants in Belgium
Authors: Susanne C.
Published: August 2005

Stature and weight of 418 men (age range 15 to 57.6 years) of Italian ancestry immigrated in Belgium are studied as a function of age, education, and of profession. Taking account of the variation observed for these factors, the results are analyzed in terms of the geographical origin and of the age at migration. Compared to a reference population, no significant differences are observed between migrants and sedentes: no evidence of selective migration could be demonstrated. Rather, the influences of environmental factors are seen in that the mean heights of Italians born in Belgium and of individuals who migrated before five years of age are significantly higher than the means of the individuals who migrated after five years.
Paternity exclusion in primates: Two strategies
Authors: Chakraborty Ranajit , Ferrell Robert E. , Schull William J.
Published: August 2005

Two strategies for the use of polymorphic biochemical and serological markers in paternity testing problems in non‐human primate groups, where pedigree information is incomplete, are discussed. The positive approach, of attempting to prove paternity, is shown to be impracticable given the levels of detectable genetic variation among primates. The more conventional approach of paternity exclusion is examined and found to be useful under certain conditions. This approach is illustrated using the published data on the levels of biochemical and serological variation in Macaca nemestrina.
Estimation of total body volume from arm measurements in Punjabi girls aged 10–19 years
Authors: Singh Raghbir , Raja Chand
Published: August 2005

Mean values and standard deviations of total body volume, body density, arm volume, height, weight and a battery of 15 measurements of arm comprising different lengths, girths, diameters and skinfolds of 200 Punjabi girls aged 10–19 years are presented. Relationship between arm volume and total body volume in different age groups are also studied. Highly significant and positive correlations existed between arm volume and total body volume and the values of correlation coefficients r ranged between 0.78 to 0.92 in different age groups. Body volume was estimated also from arm measurements by using selective stepwise multiple linear regression analysis for each age group. Highly significant multiple correlation coefficients R were obtained for predicting total body volume from arm measurements and the values of multiple R ranged between 0.92 to 0.97 in different age groups even with a combination of just three or four arm measurements. The most commonly selected measurements up to fourth step in most of the age groups were upper arm girth and maximum forearm girth.
The C3 component of complement; gene frequency variation in Iraq
Authors: Roberts D. F. , Al‐Agidi S. K.
Published: August 2005

Heterogeneity of gene frequencies in the polymorphism of the third component of complement among local samples in Iraq is analysed. It appears to derive essentially from population and not from regional differences.
Sexual activity of male rhesus monkeys introduced into a heterosexual group
Authors: Wilson Mark E. , Gordon Thomas P.
Published: August 2005

Unfamiliar males were introduced during the breeding season to a stable heterosexual group of rhesus monkeys to determine how the presence of more dominant resident males affected their mating activity and how their entry was received by resident females. Initially, new males were allowed access to females under controlled conditions both in the presence and absence of resident males, simulating situations which may occur under natural conditions. Results indicated that the sexual activity, including ejaculation rate, of the new males was initially inhibited by the presence of more dominant, resident males, but these inhibiting properties did not carry over to periods when the resident males were absent and were diminished with time. Group females preferentially directed their behavior towards the new males throughout the study. These data suggest that although entry of new males into a stable group is at low rank, their subsequent reproductive success may not be reduced and that the association with resident females may facilitate male rhesus transfer between groups observed during the breeding season.
Climate and the evolution of skull metrics in man
Authors: Guglielmino‐Matessi C. R. , Gluckman P. , Cavalli‐Sforza L. L.
Published: August 2005

Two types of data, anthropometric and gene frequencies, may be used to reconstruct human evolution. Previous research, reconstructing the history of racial differentiation on the basis of gene frequencies, indicated that the major separation between human groups was that between Africans and Europeans on one side and peoples from Australia, East Asia and Americas on the other. A similar attempt by Howells ('73b), based on skull measurements in 17 ancient populations, in agreement with earlier anthropometric data, showed the major separation to be between Africans and Australians on one side and Europeans, Asians and Americans on the other. Climate could be a contributing factor to the observed differences in skull and anthropometric measurements. Howells' data showed high correlations with several climatic indicators. Carrying out the phylogenetic analysis after elimination by linear regression of the effects of climate has resolved to a great extent the discrepancy between an‐thropometric and gene frequency data.
Correlates between locomotor anatomy and behavior in two sympatric species of Lemur
Authors: Ward Steven C. , Sussman Robert W.
Published: August 2005

Sympatric populations of Lemur catta and Lemur fulvus show major differences in their occupation of canopy forest levels. Lemur catta is usually found in the lowest levels of the forest, and uses the ground for travel over 65% of the time. Lemur fulvus uses the upper levels of the canopy forest and is observed on the ground in less than 2% of all observations. Comparison of hindlimb musculoskeletal anatomy shows statistically significant differences in the lengths of the long bones and the height of the talus. Differences also occur in ranges of tibio‐talar and mid‐talar joint mobility. The details of insertion of the biceps femoris muscle are distinct in the two species as is the relative mass of muscle associated with flexion of the pedal digits, and flexion of the tibio‐talar joint. The metric and morphological differences in the hindlimb anatomy of Lemur catta and Lemur fulvus are consistent with differences in habitat and substrate utilization.
Does allometry explain the differences between “Gracile” and “Robust” australopithecines?
Authors: Wood B. A. , Stack C. G.
Published: August 2005

The allometric relationships between canine base area, first molar and summed molar crown area, and the glabella–opisthocranion distance, and the direct allometric relationships between canine and molar size have been established in five primate taxa. Separate sex and combined sex ‘intraspecific’, and ‘interspecific’ regression and ‘best fit’ allometry coefficients were computed. This analysis showed that for any increase in glabella–opisthocranion length, the rate of increase in canine size exceeds the rate of increase in molar area, and ‘best fit’ solutions indicate that canine base area is positively allometric when related directly to molar crown area.

These results were compared with data available for the ‘gracile’ australopithecine, A. africanus, and two ‘robust’ australopithecine taxa, A. boisei and A. robustus. The differences in canine and molar size which occur between the ‘gracile’ taxon and the two ‘robust’ taxa do not correspond to any of the trends in the comparative allometric models. Data on glabella–opisthocranion length for the fossils, meagre though they are, show that while the proportional increase in molar crown area between the taxa corresponds to comparative allometry models, the reduced canine size in the ‘robust’ taxa is against comparative allometric trends.

These results indicate that, at least in terms of canine/molar proportions, the differences between the ‘gracile’ and ‘robust’ australopithecines are not merely allometric and may indicate significant dietary or behavioural differences.
Human skeletal remains from Mumba Rock Shelter, Northern Tanzania
Authors: Bräuer Günter
Published: August 2005

During their expeditions in Northern Tanzania in 1934/38, Ludwig and Margit Kohl‐Larsen (discoverer of Eyasi and Garusi hominids)excavated i. a. the Mumba Rock Shelter. This important excavation yielded human skeletal remains of 18 individuals. The most relevant results of the morphological analyses are presented here. According to the affinities and absolute dating (hominid IX, 3700 B. C. ), the present study supports recent indications of the presence of Negroid groups in East Africa at an early stage in Later Stone Age times.
New studies on the esterase D polymorphism in South American Indians
Authors: Mestriner M. A. , Simões A. L. , Salzano F. M.
Published: August 2005

A total of 2, 490 South American Indians affiliated with 10 tribes were studied for esterases A1, A2, A3, B, D, and carbonic anhydrases 1 and 2. Wide variation was observed in the prevalence of ESD1, the extreme values being 0. 44, encountered among the Xikrin, and 0. 95, found among the Cashinawa. Seven of the 10 frequencies fell within the interval of 0. 66–0. 87. These results were integrated with those of earlier surveys. In a general way we observe lower values in the eastern and Atlantic Coast groups, but this is mainly due to the low frequencies found among the Gê tribes and the Caingang, who speak a language which has many affinities with Gê. High prevalences were observed among the tropical forest tribes. A fair amount of intervillage, intratribal variation was found among the Ticuna and Caingang. No variability was detected in the A1, A2, A3, B esterases. In the carbonic anhydrases we confirmed the presence of a “private polymorphism” among the Baniwa.
Bioenergetics and the origin of hominid bipedalism
Authors: Rodman Peter S. , McHenry Henry M.
Published: August 2005

Compared to most quadrupedal mammals, humans are energetically inefficient when running at high speeds. This fact can be taken to mean that human bipedalism evolved for reasons other than to reduce relative energy cost during locomotion. Recalculation of the energy expended during human walking at normal speeds shows that (1) human bipedalism is at least as efficient as typical mammalian quadrupedalism and (2) human gait is much more efficient than bipedal or quadrupedal locomotion in the chimpanzee. We conclude that bipedalism bestowed an energetic advantage on the Miocene hominoid ancestors of the Hominidae.
Nutritional influence on childhood development and genetic control of adolescent growth of Quechuas and Mestizos from the Peruvian Lowlands
Authors: Frisancho A. Roberto , Guire Kenneth , Babler William , Borken Gary , Way Antony
Published: August 2005

The growth in height of 1,202 Quechua and Mestizo children aged 6 to 19 years of the province of Lamas in the Peruvian Eastern Lowlands was studied. As shown by evaluations of ABO, Rh systems, and skin reflectance measurements, the Quechuas are genetically different from the Mestizos. The heights of Quechuas and Mestizos were matched for nutritional status based on measurements of subcutaneous fat and body muscle. The study indicates that: (1) during childhood, Quechuas and Mestizos matched for the same nutritional status attain similar heights; (2) during adolescence (or after the age of 11 years), the Mestizos are significantly taller than the Quechuas of the same nutritional status; 3) during childhood, the relative difference in height between Quechuas and Mestizos matched for the same nutritional status is less than the difference between Quechuas (or Mestizos) of the same genetic composition characterized by good and poor nutritional status.

These findings suggest that the influence of environmental factors, such as nutrition, have a greater influence in producing differences in body size during childhood than during adolescence. Conversely, the present findings support the hypothesis that the influence of genetic factors on body size are greater during adolescence than during childhood. However, comparison of adolescent samples of similar genetic composition (whether they be Quechuas or Mestizos), characterized by good and poor nutritional status, reveal large differences in height, suggesting that under conditions of malnutrition, the genetic control of growth is diminished.
Hominid femoral neck length
Authors: Corruccini Robert S. , McHenry Henry M.
Published: August 2005

Human femoral neck length has a positive allometric or isometric relationship with total femoral length as shown by the reduced major axis slope based on logarithmic regression. The relatively long femoral neck lengths of Australopithecus cannot be explained solely as a consequence of small body size (contra Wolpoff, '78).
Secular trend in the stature and weight of Mexican‐American children in Texas between 1930 and 1970
Authors: Malina Robert M. , Zavaleta Anthony N.
Published: August 2005

Statures and weights for four samples of Mexican‐American children in Texas, measured in 1929–1931 and 1968–1972, were evaluated for evidence of a secular trend. The age range was 6 to 18 years, with more complete data from 8 through 15 years. There is no secular increase in the statures and weights of 6 year old children, a small increase in 8 years old children, and a larger secular increase at 10, 12, 14, and 15 years of age. From about 9 or 10 years of age on, the more recent Mexican‐American children tend to have greater weights for their heights. The magnitudé of the secular change per decade, however, is considerably smaller than rates for US black, white, European, and Japanese children. The estimated rates of secular change in stature for Mexican‐American children approximate about one‐fourth to one‐half of the generalized rates for European and North American children offered by Meredith ('76) and Tanner ('77). Reasons for a limited secular trend in Texas Mexican‐American children are probably bound to the matrix of lower socioeconomic circumstances, poorer health conditions, and marginal nutritional status.
Sex differences in lingual marginal ridging on the human maxillary central incisor
Authors: Harris Edward F.
Published: August 2005

Although incisor dimensions are on average larger in males, at least one incisor trait, lingual marginal ridging, is significantly more common in females. This is documented for the upper central incisor in a collation of 38 samples of living populations representing six racial groups. Caucasian, Asian, Polynesian, Melanesian, and American Indian females each possess significantly higher frequencies than their male counterparts. American Blacks do not show a sex difference. Sex differences in the duration and rate of incisor crown development do not explain this dimorphism. Possible underlying genetic causes are reviewed, and the hypothesis is proposed that relevant portions of both X chromosomes in females are contributing to greater trait expression.
Monostotic fibrous dysplasia in the temporal bone: A late prehistoric occurrence
Authors: Gregg John B. , Reed Ann
Published: August 2005

Fibrous dysplasia, characterized by benign osteolytic and osteoblastic lesions may involve one or several bones. Recent investigators have suggested that it may be merely a phase of what have previously been thought to be several different bone disease. Isolated fibrous dysplasia in the temporal bone is infrequent. Several reports of this disease have appeared in the literature of paleopathology, but none involved only the temporal bone. Monostotic involvement of the right temporal bone was discovered in the skull of an adult male recovered from an archeological site dating from the Late Mississippian period (A. D. 1,350–A. D. 1,650). It will provide an opportunity for preliminary documentation of the antiquity of this disease in the southeastern portion of the United States.
The uniqueness of Daubentonia
Authors: Oxnard Charles E.
Published: August 2005

The aberrant features of the genus Daubentonia, such as the superficially rodent‐like dentition, the globose and foreshortened brain case, and the filiform third manual digit have long been known. But the current assessment of the genus as lemuriform, and within that group as closest to the indriids, depends upon greater weight being placed upon other characteristics such as the cranial arterial pattern, the molariform teeth, and the developmental characteristics of the dentition. Prior multivariate morphometric studies have shown that though the shoulder structure of Daubentonia is uniquely different from that of all other primates, the structure of its pelvis may not be especially different from that of many relatively non‐specialized primates.

A large series of studies have been summated here in which many different anatomical regions (shoulder, arm, forearm, forelimb as a whole, pelvis, femur, hindlimb as a whole, forelimb and hindlimb combined, and total bodily proportions including limbs, trunk, and head) have been characterized osteometrically in a wide range of primate genera. The resulting data sets have been studied by discriminant function analyses. The differences that have been found are large enough that it can be confidently asserted that in its postcranial skeleton, Daubentonia is more different from the primates as a whole than is any other primate genus.

These differences are big enough that their statistical and biological significance is not at all in doubt, notwithstanding the very small numbers of available specimens of this rare genus. They are so great that functional implications exist though they cannot, in our present state of knowledge of the habits of the genus, be ascribed with any certainty. They are so great indeed, paralleling the enormous differences of Daubentonia from other primates in its dentition, skull and cheiridia, that we may prefer to keep open minds about its taxonomic placement.
The albumin polymorphism and bilirubin binding in rhesus monkeys (Macaca mulatta)
Authors: Smith David Glenn , Ahlfors Charles E.
Published: August 2005

Family studies confirmed a codominant mode of inheritance of albumin phenotypes identified in Macaca mulatta. Preliminary epidemiological and bilirubin binding studies suggest that selection favors the variant allele by reducing risks of hyperbilirubinemia and might be responsible for this otherwise rare polymorphism.
Maxillary first premolar angular differences between North American Indians and non‐North American Indians
Authors: Morris Donald H.
Published: August 2005

A quantitative technique for obtaining angular data on human maxillary first premolar teeth is presented. Measurement indicates that North American Indian buccal cusps are either buccolingually compressed mesially, or expanded distally, or both, when compared with non‐Indian teeth. Surprisingly, data on Chinese and Eskimo samples are similar to non‐Indian teeth rather than Indian teeth. Similar techniques may be applied to the more complex multicusped molar teeth in order to extract quantitative data from them.
A left/right comparison of sequential bone loss from the metacarpals of postmenopausal women
Authors: Horsman A. , Simpson M. , Armes F.
Published: August 2005

The rate of decrease of mean metacarpal cortical width was assessed by sequential radiographic morphometry for each hand separately in a series of 46 right‐handed postmenopausal women observed for 222 patient‐years. For the left hand, the mean rate was 0.0331 ± 0.0053 mm/year and for the right, 0.0310 ± 0.0060 mm/year. The difference between the hands in the rate of decrease was not significant. It is concluded that the higher work load of the dominant hand has no effect on the rate of bone loss from the metacarpals of postmenopausal women.
The relationship of body fat weight, determined densitometrically, to relative weight and triceps skinfold in American youths, 12–17 years of age
Authors: Johnston Francis E. , Paolone Albert N. , Taylor Henry L. , Schell Lawrence M.
Published: August 2005

The relationship between fat weight, measured densitometrically, and the triceps skinfold and Quetelet's Index has been analyzed by means of linear regression analysis of 235 American youths, 12–17 years of age; 48 males and 41 females were from Minneapolis and 121 males and 25 females from the Greater Philadelphia area. Validation was accomplished by using the results of 10 separate regression analysis, each on 90% of the sample, the remaining 10% serving in each instance as the validation group; this is known as the Jackknife Method. When the Minneapolis and Philadelphia components were pooled, suitable regression models were derived with standard deviations of the errors of prediction of 3.330 kg in males and 2.056 in females. When the sample was subdivided by city the SD's remained essentially the same, but the mean errors were larger. It is concluded that the linear regression models can be used on closely similar populations to estimate fat weight for groups, but estimates for individuals may be expected to have an error of ± 5–6 kg (i.e., 2 SD's) and are therefore not likely to be suitably accurate for use. The regression weights indicate a greater contribution of the triceps skinfold to fat weight than of Quetelet's Index in males. In females the reverse was found. This may affect sex differences in prevalence rates of obesity, if the diagnosis is based upon a single anthropometric indicator.
Occipital bunning among later pleistocene hominids
Authors: Trinkaus Erik , Lemay Marjorie
Published: August 2005

Occipital bunning is a posterior projection of the occipital squama, which occurs in varying frequencies in samples of archaic Homo sapiens, Upper Pleistocene anatomically modern humans, and recent humans. It can be best interpreted as a product of the timing of posterior cerebral growth relative to the growth of the cranial vault bones. It is not a feature that was unique to the Neandertals.
The Shanidar 3 Neandertal
Authors: Trinkaus Erik
Published: August 2005

The Shanidar 3 Neandertal partial skeleton preserves four teeth, major portions of the thoracic and lumbar vertebrae, sacrum, ribs, clavicles, scapulae, humeri, hand bones, innominate bones, and foot bones, plus fragments of the ulnae, radii, femora, tibiae, and fibulae. Their morphology aligns Shanidar 3 closely with the other Shanidar Neandertals and the European and Near Eastern Neandertals. This is apparent especially in the dentition, scapulae, hand bones, and pubic bones.
Trauma among the Shanidar Neandertals
Authors: Trinkaus Erik , Zimmerman M. R.
Published: August 2005

Four of the adult Neandertals from Shanidar Cave, Iraq, Shanidar 1, 3, 4, and 5, show evidence of antemortem trauma. Shanidar 1 sustained injuries to the right frontal squama, the left lateral orbit, the right humerus and right fifth metatarsal. Associated with this trauma are hypoplasia or atrophy of the right clavicle, scapula, and humerus, osteomyelitis of the right clavicle, degenerative joint disease at the right knee, ankle, and first tarsometatarsal joint, and remodeling of the left tibia. Shanidar 3 experienced trauma‐related degenerative joint disease at the right talocrural and talocalcaneal joints and sustained a penetrating wound across the left ninth rib. Shanidar 4 suffered a fracture of the right seventh or eighth rib, and Shanidar 5 had a scalp wound over the left frontal. A high frequency of antemortem trauma associated with the survival of the injured individuals appears to have been characteristic of the Neandertals.
Dermatoglyphic characters and physique: A correlation study
Authors: Rothhammer Francisco , Llop Elena , Neel James V.
Published: August 2005

The association of anthropometrics, particularly hand measurements, with dermatoglyphic characters is quantified. Children with square hands exhibit higher main line indices, a‐b ridge counts, and more open atd angles. Adults with broader hands have more arches. Taller individuals with larger hands present higher a‐b ridge counts and leaner subjects with long narrow hands, closer atd angles. The correlation of physique and dermatoglyphics is small but if verified, suggests that at early fetal stages, factors responsible for the establishment of dermatoglyphic patterns interact with genetic determinants of adult shape that are already active.
Growth and body composition of Mexican‐American boys 9 through 14 years of age
Authors: Zavaleta Anthony N. , Malina Robert M.
Published: August 2005

The growth status and densitometric estimates of body composition are considered in a cross‐sectional sample of 95 Mexican‐American boys, 9 through 14 years of age, from lower socioeconomic circumstances. A series of 19 measurements were taken on each boy, including measures of size, proportions, skeletal breadths, limb circumferences, skinfolds, and grip strength. Body density was determined by underwater weighing and residual volume was predicted. Density determinations were converted to percentage body fat using the average of two estimates from the equations of Brozek et al. (1963) and Siri (1956). Relative fatness was also converted to lean body mass and fat weight in kilograms. The growth status of the boys was compared to reference data for American White boys in the U. S. Health Examination Survey. The Mexican‐American boys are shorter and lighter than the reference data, and smaller in all anthropometric dimensions except skinfolds, which are variable. The subscapular and midaxillary skinfolds are similar in the two samples, while the triceps, medial calf, and suprailiac skinfolds are thinner in Mexican‐American boys. Regressions of the four body composition estimates on age show significant age effects only for lean body mass and fat weight. Density and percentage fat do not vary significantly with age. Compared to samples of boys in the same age range, the Mexican‐American boys generally have a greater body density. Correlations between skinfold thicknesses and body density are generally lower in the Mexican‐American boys compared to other samples. Two equations for the prediction of body density in Mexican‐American boys are offered.
Helicoidal plane of dental occlusion
Authors: Osborn J. W.
Published: August 2005

A helicoidal plane of postcanine occlusion has been patchily reported in many recent and fossil dentitions of man, and has been suggested as a taxonomic marker distinguishing between the dentitions ofHomoand Australopithecines. The present paper describes the helicoidal plane in 19 out of 23 modern human (probably Indian) worn dentitions, in both gracile and robust Australopithecines and in extant anthropoids. It is suggested that tooth wear converts the plane of occlusion present in little‐worn teeth, the Monson curve, into a helicoidal plane when 1) the diet is more abrasive, 2) the enamel is thinner and less abrasion resistant, and 3) a longer time separates the eruption of the three molar teeth in a jaw quadrant. A model demonstrates that during the power stroke of a chewing cycle the working side molars move in much the same direction whether the molar occlusal plan follows a Monson curve or a helicoidal plane. The difference is that in the former case the three molars work at the same time while in the latter case they work in sequence from anterior to posterior, thereby concentrating force on one tooth at a time. Because the occlusal plane changes during the life of individuals consuming an abrasive diet, the condition of most anthropoids and hominids, it is argued that the Monson curve has functional significance not because of its influence on occlusal relations and/or jaw movement but because the molar teeth are embedded in bone roughly perpendicular to it, a direction which resists tilting of the teeth during mastication. It is concluded that the helicoidal plane probably has little if any value as a taxonomic marker.
How do trabeculae affect the calculation of structural properties of bone?
Authors: Burr David B. , Piotrowski George
Published: August 2005

One difficulty that arises in an analysis of the cross‐sectional properties of bone is whether to include cancellous bone in the analysis. The purpose of this paper is to determine how different amounts of cancellous bone affect the measurement of structural properties of bone cross‐sections. Thirty‐two tibial and femoral cross‐sections were chosen at random from a series of cross‐sectioned nonhuman primate bones. Geometrical properties were calculated for the cross‐sections, and torsional and bending stress analyses were performed. The results suggest that the effect of including cancellous bone in the analysis is closely related to the amount of bone, where it lies within the cross‐section, and the type of analysis performed. Including cancellous bone in calculations of structural properties of bone cross‐sections may cause the strength and stiffness of the bone to be exaggerated.
Molar size sequence in Australian Aboriginals
Authors: Townsend Grant C. , Brown Tasman
Published: August 2005

Percentage frequencies for molar size sequence of first and second molars were calculated in a group of contemporary Australian Aboriginals using mesiodistal and buccolingual dimensions, as well as crown areas. Comparisons were made between sexes, arches, and dimensions within the Aboriginal groups and also between Aboriginal data and those published for other populations. The frequencies of the M2 > M1 molar size sequence in the Aboriginals fell within the range of frequencies reported for other contemporary populations. Differences in the frequencies of the M2 > M1 sequence between the sexes and between arches, together with the relatively high frequency of asymmetry in molar size sequence within Aboriginals, supported the notion that local environmental conditions acting during odontogenesis, together with differential responses to other environmental influences, play an important role in determining observed patterns of molar tooth size.
The locomotor anatomy of Australopithecus afarensis
Authors: Stern Jr. Jack T. , Susman Randall L.
Published: August 2005

The postcranial skeleton of Australopithecus afarensis from the Hadar Formation, Ethiopia, and the footprints from the Laetoli Beds of northern Tanzania, are analyzed with the goal of determining (1) the extent to which this ancient hominid practiced forms of locomotion other than terrestrial bipedality, and (2) whether or not the terrestrial bipedalism of A. afarensis was notably different from that of modern humans. It is demonstrated that A. afarensis possessed anatomic characteristics that indicate a significant adaptation for movement in the trees. Other structural features point to a mode of terrestrial bipedality that involved less extension at the hip and knee than occurs in modern humans, and only limited transfer of weight onto the medial part of the ball of the foot, but such conclusions remain more tentative than that asserting substantive arboreality. A comparison of the specimens representing smaller individuals, presumably female, to those of larger individuals, presumably male, suggests sexual differences in locomotor behavior linked to marked size dimorphism. The males were probably less arboreal and engaged more frequently in terrestrial bipedalism. In our opinion, A. afarensis from Hadar is very close to what can be called a “missing link.” We speculate that earlier representatives of the A. afarensis lineage will present not a combination of arboreal and bipedal traits, but rather the anatomy of a generalized ape.
A hominoid humeral fragment from the Pliocene of Kenya
Authors: Pickford M. , Johanson D. C. , Lovejoy C. O. , White T. D. , Aronson J. L.
Published: August 2005

The purpose of this communication is to describe and provide a preliminary interpretation of a hominoid proximal humeral fragment recovered from sediments more than 4.0 m.y. old in the Baringo District, Kenya. The geological and chronological context of the fossil is examined and associated fauna is analyzed.
Effects of protein‐calorie malnutrition during suckling and post‐weaning periods on discontinuous cranial traits in rats
Authors: Dahinten Silvia L. , Pucciarelli Héctor M.
Published: August 2005

The influences of protein‐calorie malnutrition (PCM), and sex during lactation and post‐lactation on the frequencies of 25 discontinuous cranial traits (DCT), were investigated in Holtzman rats. Significant differences were observed in about 20% of the traits. Those traits were: the interfrontal fusion, the posterior incurvation of the palatine border, the double maxillary foramen, the double posterior palatine foramen, and the double frontal foramen. Total PCM was the nutritional factor which showed the greatest influence on the variability of the DCTs. It was followed, in decreasing order, by the PCM imposed during post‐lactation and lactation. Sex had more influence than early PCM but less than late PCM. It is concluded that despite their apparent stability, a substantial number of DCTs were altered by both biological (like sex) and environmental factors (like nutritional deficiencies) imposed at different stages of postnatal development.
Skeletal growth in a medieval population from Sudanese Nubia
Authors: Hummert James R. , van Gerven Dennis P.
Published: August 2005

Long bone growth is analyzed for 180 children from a Medieval population at Kulubnarti in Sudanese Nubia (550–1450 A.D.). A regional interpopulation comparison is made with growth data from Wadi Halfa in Lower Nubia, and an intrapopulation analysis is undertaken to assess diachronic changes in growth at Kulubnarti. Changes in growth patterns are interpreted in the context of mortality and morbidity profiles and relationships between the three variables are discussed. It is suggested that changes in the sociopolitical environment may have been responsible in part for altering levels of biological stress and impacting growth.
Long bone growth variation among Arikara skeletal populations
Authors: Jantz R. L. , Owsley Douglas W.
Published: August 2005

Long bone growth variation among skeletal samples has had limited application to ecological studies of archaeological groups, in spite of its well‐known sensitivity to health and nutritional status. In this study we examine long bone growth variation among ten samples of Arikara skeletal groups, all located in the Middle Missouri subarea of South Dakota and ranging in time from A.D. 1600 to 1832. The samples are analyzed by variant, an archaeological taxonomic unit below Tradition. Children's long bones between about 0.5 and 11.9 years of age were analyzed by means of regression using the model, bone length =b0 + b1 (age) + b2 (log10 age). The three variants, Extended Coalescent, Postcontact Coalescent, and Disorganized Coalescent, differ from one another with regard to health and nutritional status. Extended Coalescent groups probably experienced periods of undernutrition due to unfavorable climatic conditions prevailing at the time. Postcontact Coalescent groups experienced more favorable health and nutrition due to improved climatic conditions and introduction of the horse. Disorganized Coalescent groups were exposed to undernutrition and high levels of morbidity, due to introduction of epidemic diseases, depopulation, and intertribal conflict.

Analysis of slopes shows significant heterogeneity among variants for humerus, radius, and tibia, but not femur. In general, the Postcontact Coalescent is characterized by slighter greater rates of increase with age and longer bone lengths for each age than is Extended Coalescent. Disorganized Coalescent exhibits lower rates of increase, particularly in later childhood, with shorter bone lengths in late childhood. Disorganized Coalescent also presents longer radius and humerus lengths than the other two variants in early childhood, an unexpected finding. This may be partly, but not entirely, explained by differential bone response to stress along the lines of maturity gradients.
Technical report: A method for recovering the palmar and plantar pads of small primate cadaver specimens for dermatoglyphic analysis
Authors: Glassman David M. , Webb R. Steven
Published: August 2005

A method for recovering dermatoglyphic data from tamarin cadavers is described. The method involves the complete removal of the palmar and plantar pads with no destruction to the underlying skeletal elements. Once recovered, the pads are stored in a formalin solution. The stored pads of 213 individuals have remained in a good state of preservation for dermatoglyphic analysis for over four years.
Locomotion and postures of red howlers in a deciduous forest‐savanna interface
Authors: Ybarra Miguel A. Schön
Published: August 2005

Positional (postural and locomotor) patterns and substrates used by the seven adults of a free‐ranging troop of red howling monkeys (Alouatta seniculus) were identified and sampled during their feeding and resting. Traveling patterns and substrates were noted but not quantified. Arboreal locomotor behaviors were pronograde quadrupedalism, some leaping, bridging, lowering, and pull up. Sitting and reclining were the most frequent postures. Tail suspension and arboreal bipedal stance were used when feeding. Predominant locomotor behaviors were those in which limbs appeared to be compression stressed. There were no limb suspensions. The monkeys used the entire tree canopy, that of the low shrubs, and did a good deal of travel on the ground. The lack of forelimb suspension is attributed to the inability of these howlers to hang beneath supports and look forward at the same time; the impediment is created by the size of the vocal organs in the neck. The locomotion of these monkeys is offered to depict that of Aegyptopithecus zeuxis.
Computerized X‐ray tomography of fossil hominid skulls
Authors: Wind Jan
Published: August 2005

The newest generation of Computerized Tomography (CT) scanners appears to provide x‐ray pictures of the internal structures of a rather heavily mineralized Homo erectus skull, i.e., Pithecanthropus IV, notably of its temporal bones, that reveal more details than traditional x‐ray procedures. An analysis of the right temporal bone shows that it is extensively pneumatized, that the oval shape of the external meatus does not result from fractures as previously suggested, and that the middle ear and the internal auditory meatus have probably been damaged during restoration. Labyrinthine structures can be seen, and the facial nerve canal appears to be of a relative small size.
A metrical comparison of maxillary first premolar form
Authors: Lavelle Christopher L. B.
Published: August 2005

In a study of maxillary right first premolar morphology, multivariate analysis showed varying degree of separation between four human ethnic groups depending upon the actual metrical profile included in the analysis. Such ethnic discriminations were not possible from visual inspection or univariate analysis of individual crown diameters. Although the interpretation of such ethnic contrasts remains obscure, this study demonstrated the potential of multivariate statistical techniques in the investigation of odontometric data.
A population genetic study in the Ochamchir Region, Abkhazia, SSR
Authors: Ferrell Robert E. , Salamatina Naira V. , Dalakishvili S. M. , Bakuradze N. A. , Chakraborty Ranajit
Published: August 2005

The reported longevity of residents of the Soviet Socialist Republic of the Caucasus has focused considerable attention on this population. However, little is known of the genetic composition of this population. With this in mind, several village populations of the Ochamchir Region, Abkhazia, SSR, were typed for 37 discrete genetic blood groups, erythrocyte and plasma protein loci. Gene and haplotype frequencies calculated for the polymorphic markers were determined and the results used in an analysis of intervillage heterogeneity and genetic distance analysis comparing the Abkhazians to European and Asian reference populations. The Abkhazians are approximately equal distance from European and West Asian populations in a genetic sense, and this is consistent with their geographical location. In addition to the usual genetic polymorphisms, rare electrophoretic variants were encountered at the lactate dehydrogenase A and phosphohexose isomerase loci. These results suggest that the population of the Ochamchir Region is relatively homogeneous and not distinctly different from its geographical neighbors.
Relative brain size in monkeys and prosimians
Authors: Armstrong Este
Published: August 2005

Prosimians have smaller brains relative to their body sizes than do monkeys. Brain and body weights, however, are associated not only on the basis of the brain integrating sensorimotor functions, but also on the basis of the body's requirement to support the energetic needs of the brain. Prosimians differ from monkeys in that they have lower rates of oxygen turnover. When body size is adjusted for its rate of oxygen turnover, monkeys and prosimians have equivalent relative brain sizes. A consideration of the brain's energy requirements helps to clarify brain‐body relationships.
Lead in bone III. Prediction of social correlates from skeletal lead content in four Colonial American populations (Catoctin Furnace, College Landing, Governor's Land, and Irene Mound)
Authors: Aufderheide Arthur C. , Angel J. Lawrence , Kelley Jennifer O. , Outlaw Alain C. , Outlaw Merry A. , Rapp George , Wittmers Lorentz E.
Published: August 2005

Lead content was determined in the skeletal tissue of 82 individuals representing two black and two white Colonial American populations: Catoctin Furnace, College Landing, Governor's Land, and Irene Mound. Group and individual differences in bone lead concentrations were used to assess behavioral, social and occupational characteristics.

Variations in skeletal lead content suggested that the white owners of the Catoctin iron furnace shared little of their food and beverage with their black, male, industrial slaves, but that some of these workers' women had access to the owners' food sources—probably via domestic duty assignments. A broad range of lead concentrations in bones of the free blacks at College Landing implies a wide range of economic success among these tradesmen. Bone lead content of the white populations at Governor's Land and Irene Mound helped confirm family relationships that had been assigned on an archaeological and osteological basis, and also suggested that the social and functional status of the white tenant farmers' white servants frequently differed little from that of black slaves.

These findings suggest that, when applied in appropriate circumstances, lead studies of archaeological skeletal tissue may provide information supplemental to that derived from historical, archaeological, or other conventional sources.
Molar microwear and diet in the genus Cebus
Authors: Teaford Mark F.
Published: August 2005

Recent analyses have documented differences in dental microwear between primate species with different diets, especially between primate hard‐object feeders and primate leaf‐eaters. Thus far, these microwear differences have only been documented for primates with vastly different foraging strategies and geographic distributions. To see if similar differences could be documented for closely related species, dental replicas from Cebus apella, Cebus nigrivittatus, and Cebus capucinus were examined using scanning electron microscopy. Quantitative analyses reveal that (1) even for closely related species, microwear differences between facets of one species are still far less than those between homologous facets of different species; and (2) the dental microwear of Cebus apella, Cebus nigrivittatus, and Cebus capucinus are still significantly different from one another. Furthermore, the data suggest that the dietary differences between these species may center around the presence or absence of hard objects in the diet.
On the genetic and cultural relationships of certain polynesian outlier populations
Authors: Kirch Patrick V.
Published: August 2005

The results of a population genetic study of several Polynesian Outlier and Melanesian populations are compared with recent findings from archaeology. Certain remarkable correspondences offer independent confirmation of particular inter‐island contacts and prehistoric population movements.