bluuebunny/crossref_metadata_2025_split huggingface dataset:
Verb and noun generation tasks in Huntington's disease
Authors: Péran Patrice , Démonet Jean‐François , Pernet Cyril , Cardebat Dominique 
Published: May 2004

AbstractWe compared noun‐ and verb‐generation tasks in a demented group (n = 9, Dementia Rating Scale ≤ 129) and in a non‐demented group (n = 17, Dementia Rating Scale > 129) of Huntington's disease (HD) patients compared to 26 matched normal subjects. We did not find a specific deficit for verb production in non‐demented patients who had a performance similar to but weaker than that of the controls across the four tasks. The profile of results was different in the demented group because, apart from a global deficit whatever the task in comparison with both non‐demented and control groups, the demented patients exhibited increased difficulties in the two tasks implying verb production. The deficit of verb production observed in demented HD patients is discussed in relation to the damage to the motor loop in HD patients at later stages of disease. © 2003 Movement Disorder Society
Grip force abnormalities in de novo Parkinson's disease
Authors: Fellows Stuart J. , Noth Johannes 
Published: May 2004

AbstractIn recent years it has been shown that a variety of movement disorders are associated with abnormalities of the fine motor control of the hand. In Parkinson's disease (PD), these changes consist of a slowing of the rate of grip force development and the use of abnormally large grip forces both during lifting and static holding of an object. It has been suggested, however, that these changes are a direct effect of the patient's levodopa medication or associated with levodopa induced dyskinesias. Accordingly, we examined the performance of de novo Parkinson patients in a precision lifting task. All patients (n = 6) were newly diagnosed and showed rigidity, bradykinesia, or both, but were unaffected by tremor or dyskinesia. None of the patients had received antiparkinson medication. Grip force was abnormally high in both the lifting and hold phases. This exaggeration was equal in magnitude to that observed previously in medicated patients. Thus we conclude that the abnormalities in grip force observed here are intrinsic features of PD and not the result of dopamine medication or its side effects. © 2004 Movement Disorder Society
Arg(184)his mutant GTP cyclohydrolase I, causing recessive hyperphenylalaninemia, is responsible for dopa‐responsive dystonia with parkinsonism: A case report
Authors: Kikuchi Akio , Takeda Atsushi , Fujihara Kazuo , Kimpara Teiko , Shiga Yusei , Tanji Hiroaki , Nagai Makiko , Ichinose Hiroshi , Urano Fumi , Okamura Nobuyuki , Arai Hiroyuki , Itoyama Yasuto 
Published: May 2004

AbstractWe describe a 54‐year‐old man with dominant adult‐onset dopa‐responsive dystonia (DRD) with parkinsonism caused by an Arg184His mutation in guanosine 5′‐triphosphate cyclohydrolase I (GCH‐I). This is the first mutation in the GCH‐I gene that has been proven to be responsible for both recessive and dominant phenotypes. © 2004 Movement Disorder Society
Cerebrospinal fluid analysis differentiates multiple system atrophy from Parkinson's disease
Authors: Abdo W. Farid , De Jong Daniëlle , Hendriks Jan C.M. , Horstink Martin W.I.M. , Kremer Berry P.H. , Bloem Bastiaan R. , Verbeek Marcel M. 
Published: May 2004

AbstractWe investigated whether cerebrospinal fluid (CSF) analysis discriminates between idiopathic Parkinson's disease (PD; n = 35) and multiple system atrophy (MSA; n = 30). The median CSF concentration of the neurotransmitter metabolites 5‐hydroxyindolacetic acid (5‐HIAA) and 3‐methoxy‐4‐hydroxyphenylethyleneglycol (MHPG) was reduced significantly (49‐70%) in MSA compared to PD. In contrast, several brain‐specific proteins (tau, neuron‐specific enolase, myelin basic protein) were elevated (130–230%) in MSA compared with those in PD. A combination of CSF tau and MHPG discriminated PD from MSA (adjusted odds ratios: tau, 27.2; MHPG, 0.14). Our data suggest that the more progressive and widespread neurodegenerative nature of MSA, as compared with PD, is reflected in the composition of CSF. We propose that CSF analysis may become part of the diagnostic work‐up of patients with parkinsonian syndromes. © 2003 Movement Disorder Society
Senile chorea treated by deep brain stimulation—A clinical, neurophysiological and functional imaging study
Authors: Yianni John , Nandi Dipankar , Bradley Kevin , Soper Nigel , Gregory Ralph , Joint Carole , Stein John , Scott Richard , Aziz Tipu 
Published: May 2004

AbstractWe report on a patient with senile chorea, treated with deep brain stimulation of the left globus pallidus internus and subsequently the left ventralis oralis posterior nucleus of the thalamus. Deep brain field potential recordings and functional imaging using single photon emission tomography enabled us to suggest pathophysiological mechanisms for the symptoms. © 2004 Movement Disorder Society
Propriospinal myoclonus after treatment with ciprofloxacin
Authors: Post Bart , Koelman Johannes H.T.M. , Tijssen Marina A.J. 
Published: May 2004

AbstractThe clinical and electrophysiological features of a truncal myoclonus in a 55‐year‐old man are described. The electromyographic characteristics point toward propriospinal myoclonus. It is suggested that a myoclonic generator was released after use of ciprofloxacin, by antagonising the γ‐aminobutyric acid metabolism. © 2004 Movement Disorder Society
Severe resting clonus caused by thyrotoxicosis in a 16‐year‐old girl with hereditary spastic paraparesis: A case report
Authors: Sanger Terence D. 
Published: May 2004

AbstractA 16‐year‐old girl with a history of hereditary spastic paraparesis developed the subacute onset of severe clonus and new upper‐extremity spasticity due to thyrotoxicosis. This case demonstrates the ability of hyperthyroid states to worsen symptoms of spasticity in a child with an underlying spastic disorder. It also demonstrates the importance of investigating for common systemic diseases as a cause of movement disorders even in children with underlying known genetic disorders. © 2004 Movement Disorder Society
Status dissociatus after surgery for tegmental ponto‐mesencephalic cavernoma: A state‐dependent disorder of motor control during sleep
Authors: Provini Federica , Vetrugno Roberto , Pastorelli Francesca , Lombardi Carolina , Plazzi Giuseppe , Marliani Anna Federica , Lugaresi Elio , Montagna Pasquale 
Published: May 2004

AbstractAfter surgery for a tegmental ponto‐mesencephalic cavernoma, a patient developed sleep‐related excessive fragmentary myoclonus, diffuse myoclonic jerks, simple quasipurposeful movements of the limbs, and rapid eye movement (REM) sleep behaviour disorder as motor features of status dissociatus, a condition in which elements of one state of being (wake, NREM and REM sleep) pathologically intrude into another. © 2004 Movement Disorder Society
Deep brain stimulation in myoclonus–dystonia syndrome
Authors: Cif Laura , Valente Enza Maria , Hemm Simone , Coubes Christine , Vayssiere Nathalie , Serrat Stéphanie , Di Giorgio Annalisa , Coubes Philippe 
Published: May 2004

AbstractMyoclonus–dystonia syndrome (MDS) is an autosomal dominant disorder characterized by bilateral myoclonic jerks. An 8‐year‐old boy presenting with early onset, medically intractable, MDS due to a mutation in the ϵ‐sarcoglycan gene (SGCE) underwent chronic bilateral stimulation of the globus pallidus internus, which eliminates both myoclonus and dystonia. We conclude that deep brain stimulation can be an effective and safe treatment for MDS. © 2004 Movement Disorder Society
Enhancing recognition of early Parkinsonism in the community
Authors: Höglinger Günter U. , Rissling Ida , Metz Aline , Ries Vincent , Heinermann Anne , Prinz Helge , Spieker Sybille , Deuschl Günter , Baum Erika , Oertel Wolfgang H. 
Published: May 2004

AbstractBecause Parkinsonism is underdiagnosed in the community, we have validated screening modalities in the field setting and developed a screening procedure to enhance recognition of undiagnosed patients. In a first survey, we identified suspect cases among patients consulting 9 general practitioners (GPs) over a 3‐week period using in parallel: (1) a published questionnaire; (2) a standardized examination by the GPs; (3) clinical impression of the GPs; or (4) pre‐established diagnoses. Parkinsonism was ascertained by two neurologists with a 1‐year follow‐up and FP‐CIT‐SPECT. In total, 1,411 patients consulted the GPs, 1,030 participated in the study, 87 possible cases were identified by at least one of four screening modalities, 12 suffered from Parkinsonism, and 4 of these 12 were de novo cases. Statistical analysis demonstrated that with appropriate evaluation, the questionnaire is highly sensitive and excludes most nonaffected persons, and that the GPs' clinical impression is more specific. We therefore tested in a second survey the efficacy of a serial screening, starting with the questionnaire, followed by a standardized GP evaluation, and then by neurological examination. Of 1,353 participants seen by 9 GPs during a 3‐week period, 5 de novo cases were identified. This simple screening protocol significantly enhances recognition of incipient Parkinsonism. © 2004 Movement Disorder Society
Semiquantitative study of current coffee, caffeine, and ethanol intake in essential tremor cases and controls
Authors: Louis Elan D. , Jurewicz Eva C. , Applegate Lakeisha , Luchsinger Jose A. , Factor‐Litvak Pam , Parides Michael 
Published: May 2004

AbstractThere are several reasons to study caffeine, coffee, and ethanol intake in essential tremor (ET) patients. ET patients also might modify their use of these beverages because of their effects on tremor. Intake of caffeine, coffee, and ethanol has not been quantified in a group of ET patients. Our objective is to use a semiquantitative food frequency questionnaire to compare current daily intake of coffee, caffeine, and ethanol in ET patients and controls. A total of 130 ET cases were patients at the Neurological Institute of New York, and 175 controls were ascertained by random digit dialing. Caffeine (in milligrams) and ethanol (in grams) intake were calculated from a semiquantitative food‐frequency questionnaire. Mean daily caffeine intake in patients was 138.4 versus 246.6 mg in controls; medians were 101.1 versus 175.5 mg (P < 0.001). Mean daily ethanol intake in patients was 8.2 versus 6.2 gm in controls; medians were 2.4 versus 1.9 gm (P = 0.89). Cases drank less coffee than controls, but drank similar amounts of tea, soft drinks, fruit juices, and milk. Daily caffeine intake was not correlated with tremor severity or duration. ET patients consumed less caffeine than did controls, which is likely to be a dietary modification in response to tremor. The observation that caffeine consumption was not correlated with tremor severity raises the additional possibility that lower caffeine consumption in ET patients may not exclusively be a response to tremor. A prospective study is needed to explore whether decreased caffeine consumption is a risk factor for ET. © 2004 Movement Disorder Society
Drug adherence in Parkinson's disease
Authors: Leopold Norman A. , Polansky Marcia , Hurka Marcia R. 
Published: May 2004

Abstract:Physicians modify drug schedules in response to their patients' clinical responses. Failure to relieve patients' symptoms or the emergence of drug‐related side effects may reflect nonadherence to a prescribed drug schedule rather than incorrect therapeutic physician decisions. Using a medication questionnaire and a computerized medication event monitoring system (MEMS) to monitor medication use, nonadherence of drug use was examined in subjects with Parkinson's disease (PD). We report that prescription nonadherence in PD subjects was common and approximated that reported in other chronic diseases. During a 28‐day observation period, only 4 of 39 subjects had complete schedule adherence, i.e., no missed, extra, or mistimed doses. Using a questionnaire, 24.3% of subjects acknowledged missing any doses but the computerized MEMS recorded that 51.3% of subjects missed at least one dose per week and 20.5% of subjects missed three or more doses per week. Mistiming of doses was admitted by 73% of subjects but 82.1% had recorded mistimed doses. Of multiple sociodemographic and disease‐related items examined, only gender and level of education were statistically related to nonadherence. © 2004 Movement Disorder Society
SAR affected by shapes and electrical properties of the human head exposed to a cellular phone
Authors: Chen Hsing‐Yi , Yang Han‐Peng 
Published: May 2004

AbstractThe local maximum specific absorption rate (SAR) induced in spherical, cubical, coarse, and realistic human‐head models exposed to a cellular phone is investigated using the finite‐difference time‐domain (FDTD) method at 900 and 1800 MHz, respectively. These four human‐head models each have greatly different shapes but almost the same volume. Obtained local maximum SARs induced in these four human‐head models for homogeneous cases are found to have an average differences of about 15% and 12% at 900 and 1800 MHz, respectively. A comparison of SARs induced in the realistic human‐head model for homogeneous and inhomogeneous cases is also made. It is found that the local maximum SAR induced in the homogeneous human‐head model is larger than that induced in the inhomogeneous human head model. © 2004 Wiley Periodicals, Inc. Microwave Opt Technol Lett 42: 1–4, 2004; Published online in Wiley InterScience (www.interscience.wiley.com). DOI 10.1002/mop.20189
Electrically and mechanically tunable waveguide filter
Authors: Mias C. , Tsakonas C. 
Published: May 2004

AbstractA novel, hybrid, electrically and mechanically tunable band‐stop waveguide filter is presented. The filter consists of a dielectric substrate on which a ring microstrip element is etched. The mechanical tuning range (the maximum band‐stop frequency that can be attained) is shown to be limited by the distance of the ring element from the conducting waveguide walls. This limitation is overcome by introducing electrical tuning, which is achieved by incorporating varactor diodes on the microstrip ring element. © 2004 Wiley Periodicals, Inc. Microwave Opt Technol Lett 42: 13–15, 2004; Published online in Wiley InterScience (www.interscience.wiley.com). DOI 10.1002/mop.20192
Band‐rejection and bandpass filters based on mechanically induced long‐period fiber gratings
Authors: Chen Kai , Sheng Qiuqin , Dong Xiaoyi 
Published: May 2004

AbstractWe present a novel method to fabricate fiber filters based on mechanically induced long‐period fiber gratings. Transmission spectra can be tailored by external pressures or by introducing a phase‐shift. As an example, the filter was used to flatten the spectral output from an Er‐doped superfluorescent fiber source. © 2004 Wiley Periodicals, Inc. Microwave Opt Technol Lett 42: 15–17, 2004; Published online in Wiley InterScience (www.interscience.wiley.com). DOI 10.1002/mop.20193
Antenna far‐field pattern reconstruction using equivalent currents and genetic algorithms
Authors: Pérez J. R. , Basterrechea J. 
Published: May 2004

AbstractA method for computing the far‐field pattern of an antenna under test (AUT) from near‐field data is presented. Based on the equivalence principle, the AUT is replaced by equivalent magnetic surface currents, whose components are optimized using microgenetic algorithms. Results of reconstructed far‐field patterns from synthetic near‐field samples, a comparison to the approach using classical methods, and an analysis of the method's performance and limitations are included. © 2004 Wiley Periodicals, Inc. Microwave Opt Technol Lett 42: 21–25, 2004; Published online in Wiley InterScience (www.interscience.wiley.com). DOI 10.1002/mop.20195
Face recognition with transmissive liquid crystal panels
Authors: Chen Chulung , Chang Wen‐Yung 
Published: May 2004

AbstractA technique for facial‐image recognition, based on the nonzero‐order joint‐transform correlator constructed with liquid‐crystal spatial light modulators (LCSLMs), is introduced. The method of Lagrange multipliers is utilized to design the reference function. We also add some noise in training images to investigate the performance. © 2004 Wiley Periodicals, Inc. Microwave Opt Technol Lett 42: 31–34, 2004; Published online in Wiley InterScience (www.interscience.wiley.com). DOI 10.1002/mop.20197
Hybrid GB and PO analysis of electromagnetic radiation/scattering from large reflector antennas with tapered impedance surfaces
Authors: Chou Hsi‐Tseng , Tuan Shih‐Chung , Hsiao Yu‐Ting 
Published: May 2004

AbstractA hybrid scheme combining Gaussian beam (GB) and physical optics (PO) approaches is presented for an efficient analysis of reflector antennas with tapered‐impedance edge boundaries. The reflecting surface is divided into an interior portion with uniform impedance and a smooth boundary, where the GB approach can be employed, and an exterior portion of tapered impedance, which is analyzed by the PO approach. The high efficiency of the GB analysis potentially accelerates the entire analysis, as compared with the case in which only PO is employed. © 2004 Wiley Periodicals, Inc. Microwave Opt Technol Lett 42: 34–37, 2004; Published online in Wiley InterScience (www.interscience.wiley.com). DOI 10.1002/mop.20198
Dual‐frequency planar inverted‐L antenna with circular‐sided patch
Authors: Chi Gaoming , Li Binhong , Qi Dongsheng 
Published: May 2004

AbstractThe design of a dual‐frequency planar inverted‐L antenna with a circular‐sided patch is described. The proposed antenna exhibits good dual‐frequency characteristics with the frequency ratio ranging from 1.70 to 1.98. Measured results of the performance of the antenna are presented. © 2004 Wiley Periodicals, Inc. Microwave Opt Technol Lett 42: 40–41, 2004; Published online in Wiley InterScience (www.interscience.wiley.com). DOI 10.1002/mop.20200
Overcoming chromatic dispersion effects with enhanced RF gain using the phase detuning technique in an SOA cascaded optical single‐sideband transmission
Authors: Koo Bon‐Jo , Lee Ui‐Soo , Lee Seok , Han Sang‐Kook 
Published: May 2004

AbstractA new technique to improve analog optical‐transmission performance using an optical single‐sideband (SSB) system with cascaded semiconductor optical amplifier (SOA) has been proposed. Our 92‐km transmission experiment shows that this technique does not show any chromatic‐dispersion effects and also gives larger RF gain compared to the conventional SSB modulated signal. © 2004 Wiley Periodicals, Inc. Microwave Opt Technol Lett 42: 42–43, 2004; Published online in Wiley InterScience (www.interscience.wiley.com). DOI 10.1002/mop.20201
Compact folded line bandstop and lowpass filters
Authors: Peddibhotla Harish , Settaluri Raghu K. 
Published: May 2004

AbstractCompact multiple‐coupled folded line bandstop and lowpass filter structures are presented in this paper. A common design procedure is used to design both types of filters. The procedure for obtaining the reduced two‐port network parameters is described. The effect of mutual coupling among the lines, curved‐line sections, and interconnecting lengths of sections are taken into account in order to obtain the network parameters. The filter designs have been validated by using full‐wave EM simulation, as well as by comparison with the measurements. The distinct advantages of the folded‐line filter designs are a compact footprint and realizable physical dimensions. © 2004 Wiley Periodicals, Inc. Microwave Opt Technol Lett 42: 44–46, 2004; Published online in Wiley InterScience (www.interscience.wiley.com). DOI 10.1002/mop.20202
Full‐wave analysis of industrial microwave applicators: TE modes
Authors: Lohr C. , Pribetich P. , Stuerga D. 
Published: May 2004

AbstractIn this paper, full‐wave analysis of the TE modes of an industrial cylindrical microwave applicator is presented. The dispersion characteristics and fields configurations are shown. These results are obtained by a numerical simulation based on the residue theory. The authors have obtained particular modes called loop modes, which have a complex propagation constant that describes a loop within the complex plane. © 2004 Wiley Periodicals, Inc. Microwave Opt Technol Lett 42: 46–50, 2004; Published online in Wiley InterScience (www.interscience.wiley.com). DOI 10.1002/mop.20203
De‐embedding techniques for embedded microstrips
Authors: Song J. M. , Ling F. , Blood W. , Demircan E. , Sriram K. , Flynn G. , To K.‐H. , Tsai R. , Li Q. , Myers T. , Petras M. , Dengi A. 
Published: May 2004

AbstractThree parameters are needed to model symmetrical adapters, but not enough equations can be found to solve them. The proposed two‐impedance model with one shunt and one series impedance gives consistent results when applied to three different lengths of embedded microstrip transmission lines. This model can be used with more complicated structures than the single‐impedance model. © 2004 Wiley Periodicals, Inc. Microwave Opt Technol Lett 42: 50–54, 2004; Published online in Wiley InterScience (www.interscience.wiley.com). DOI 10.1002/mop.20204
A monolithic 1.57/5.25‐GHz concurrent dual‐band low‐noise amplifier using InGaP/GaAs HBT technology
Authors: Lu Shey‐Shi , Lin Yo‐Sheng , Lee Bo‐Wei 
Published: May 2004

AbstractA monolithic concurrent dual‐band low‐noise amplifier (LNA) using InGaP/GaAs HBT technology is demonstrated for the first time. The LNA provides narrowband gain and matching simultaneously at both 1.57‐GHz (GPS) and 5.25‐GHz (ISM) bands. It consumes only 15‐mW power and achieves transducer gains (S21) of 25.3 and 14.3 dB, input return losses (S11) of 6.8 and 11.5 dB, reverse isolation (S12) of −30.8 and −32.2 dB, and noise figures of 2.55 and 4.5 dB at these two bands, respectively. The performance at 5.25 GHz is comparable with the 2.45/5.25‐GHz concurrent dual‐band CMOS LNA with a bonding wire as the gate inductor using 0.35‐m CMOS technology1. © 2004 Wiley Periodicals, Inc. Microwave Opt Technol Lett 42: 58–60, 2004; Published online in Wiley InterScience (www.interscience.wiley.com). DOI 10.1002/mop.20206
Computational modeling of supercontinuum generation in fused silica by a femtosecond laser pulse of a few optical cycles
Authors: Hovhannisyan David , Stepanyan Komitas 
Published: May 2004

AbstractThe numerical solution of a wave equation describing the propagation of the laser pulse of a few optical cycles in fused silica is obtained. Our numerical simulations closely follow the published experimental data. A shifting of the spectrum peak of the broadened pulse, depending on the input‐pulse central wavelength, is observed. © 2004 Wiley Periodicals, Inc. Microwave Opt Technol Lett 42: 60–64, 2004; Published online in Wiley InterScience (www.interscience.wiley.com). DOI 10.1002/mop.20207
High‐gain broadband optical‐waveguide amplifiers
Authors: Chen Haiyan , Liu Yongzhi , Dai Jizhi , Yang Yapei 
Published: May 2004

AbstractA novel wideband and high‐gain waveguide‐amplifier structure, which consists of a folded geometry erbium‐ytterbium co‐doped phosphate glass waveguide integrated with a cascaded multilayer medium thin‐film filter (CMMTFF), is proposed. This CMMTFF consists of some different filter‐unit cells with different central wavelengths and bandwidths, and each of them can suppress a certain gain peak at a specific wavelength. The gain characteristics of this new optical amplifiers is obtained. © 2004 Wiley Periodicals, Inc. Microwave Opt Technol Lett 42: 64–66, 2004; Published online in Wiley InterScience (www.interscience.wiley.com). DOI 10.1002/mop.20208
Wide‐tuning‐range K‐band microwave‐photonic VCO using an all‐optical heterodyne scheme
Authors: Kwak Noh‐Min , Huh Hyeongjun , Jeong Heeseong , Cho Kyuman 
Published: May 2004

AbstractThis paper presents an all‐optical technique for providing a wide‐tuning‐range K‐band microwave‐photonic (MWP) voltage‐controlled oscillator (VCO). The frequency‐tuning range and gain of the VCO are 16 GHz and 25 MHz/mV, respectively. © 2004 Wiley Periodicals, Inc. Microwave Opt Technol Lett 42: 66–68, 2004; Published online in Wiley InterScience (www.interscience.wiley.com). DOI 10.1002/mop.20209