69. Norman JF, Kappers AML, Beers AM, Scott AK, Norman HF, et al. (2011) Aging and the haptic perception of 3D surface shape. Atten Percept Psychophys 73(3): 908–918. 70. Kattenstroth JC, Kalisch T, Tegenthoff M, Dinse HR (2009) Dance therapy for cognitive enhancement in the elderly. Frontiers in Neuroscience 3: 100–101. 71. Kattenstroth JC, Kolankowska I, Kalisch T, Dinse HR (2010) Superior sensory, motor, and cognitive performance in elderly individuals with multi-year dancing activities. Front Aging Neurosci 2(31. 72. Dinse HR (2005) Treating the aging brain: cortical reorganization and behavior. Acta Neurochir Suppl 93: 79–84. 73. Tremblay F, Mireault A, Le´tourneau J, Pierrat A, Bourrassa S (2002) Tactile perception and manual dexterity in computer users. Somatosens Mot Res 19(2): 101–108. 74. Wu CW, Seo HJ, Cohen LG (2006) Influence of electric somatosensory stimulation on paretic-hand function in chronic stroke. Arch Phys Med Rehabil 87(3): 351–357. 75. Dellon AL, Kallman CH (1983) Evaluation of functional sensation in the hand. J Hand Surg Am 8(6): 865–870. 76. Dinse HR, Ragert P, Pleger B, Schwenkreis P, Tegenthoff M (2003) Pharmacological modulation of perceptual learning and associated cortical reorganization. Science 301(5629): 91–94. 77. Pleger B, Dinse HR, Ragert P, Schwenkreis P, Malin JP, et al. (2001) Shifts in cortical representations predict human discrimination improvement. Proc Natl Acad Sci U S A 98(21): 12255–12260. 78. Kalisch T, Tegenthoff M, Dinse HR (2007) Differential effects of synchronous and asynchronous multifinger coactivation on human tactile performance. BMC Neurosci 8: 58. 79. Legge GE, Madison C, Vaughn BN, Cheong AMY, Miller JC (2008) Retention of high tactile acuity throughout the life span in blindness. Percept Psychophys 70(8): 1471–1488. 80. Desrosiers J, He´bert R, Bravo G, Rochette A (1999) Age-related changes in upper extremity performance of elderly people: a longitudinal study. Exp Gerontol 34(3): 393–405. 81. Amirjani N, Ashworth NL, Gordon T, Edwards DC, Chan KM (2007) Normative values and the effects of age, gender, and handedness on the Moberg Pick-Up Test. Muscle Nerve 35(6): 788–792. 82. Kucian K, Loenneker T, Dietric T, Martin E, von Aster M (2005) Gender differences in brain activation patterns during mental rotation and number related cognitive tasks. Psychology Science 47(1): 112–131. 83. Scho¨ning S, Engelien A, Kugel H, Scha¨fer S, Schiffbauer H, et al. (2007) Functional anatomy of visuo-spatial working memory during mental rotation is influenced by sex, menstrual cycle, and sex steroid hormones. Neuropsychologia 45(14): 3203–3214. 84. Baddeley A (1992) Working memory. Science 255(5044): 556–559. Haptic Performance in Later Life 85. Weiss E (2003) Sex differences in brain activation pattern during a visuospatial cognitive task: a functional magnetic resonance imaging study in healthy volunteers. Neuroscience Letters 344(3): 169–172. 86. Roberts J, Bell MA (2000) Sex Differences on a Mental Rotation Task: Variations in Electroencephalogram Hemispheric Activation Between Children and College Students. HDVN 17(2): 199–223. 87. Geiser C, Lehmann W, Eid M (2008) A note on sex differences in mental rotation in different age groups. Intelligence 36(6): 556–563. 88. Casey MB, Nuttall R, Pezaris E, Benbow CP (1995) The influence of spatial ability on gender differences in mathematics college entrance test scores across diverse samples. Developmental Psychology 31(4): 697–705. 89. Casey MB, Nuttall RL, Pezaris E (1997) Mediators of gender differences in mathematics college entrance test scores: A comparison of spatial skills with internalized beliefs and anxieties. Developmental Psychology 33(4): 669–680. 90. Saucier D, McCreary D, Saxberg J (2002) Does gender role socialization mediate sex differences in mental rotations. Personality and Individual Differences 32(6): 1101–1111. 91. Lacey S, Flueckiger P, Stilla R, Lava M, Sathian K (2010) Object familiarity modulates the relationship between visual object imagery and haptic shape perception. Neuroimage 49(3): 1977–1990. 92. Li S, Jordanova M, Lindenberger U (1998) From good senses to good sense: A link between tactile information processing and intelligence. Intelligence 26(2): 99–122. 93. Jensen AR (1993) Spearman’s g: links between psychometrics and biology. Ann N Y Acad Sci 702: 103–129. 94. Roznowski M (1993) Measures of cognitive processes: Their stability and other psychometric and measurement properties. Intelligence 17(3): 361–388. 95. Vernon PA, Weese SE (1993) Predicting intelligence with multiple speed of information-processing tests. Personality and Individual Differences 14(3): 413–419. 96. Folstein MF, Folstein SE, McHugh PR (1975) ‘‘Mini-mental state’’. A practical method for grading the cognitive state of patients for the clinician. J Psychiatr Res 12(3): 189–198. 97. Godde B, Stauffenberg B, Spengler F, Dinse HR (2000) Tactile coactivation- induced changes in spatial discrimination performance. J Neurosci 20(4): 1597–1604. 98. Raven J (2000) The Raven’s progressive matrices: change and stability over culture and time. Cogn Psychol 41(1): 1–48. 99. Jensen A (1998) The g factor. London: Praeger. 100. Raven J (2000) Manual for Raven’s Progressive Matrices and Vocabulary Scales. Research supplement no. 3 (2nd/3rd edition): A compendium of international and North American normative and validity studies together with a review of the use of the RPM in neuropsychological assessment. Oxford: Oxford Psychologists Press. PLoS ONE | www.plosone.org 11 January 2012 | Volume 7 | Issue 1 | e30420