Journal
NEUROPSYCHOLOGIA
Volume 44, Issue 12, Pages 2582-2586Publisher
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.neuropsychologia.2006.03.037
Keywords
handedness; chimpanzees; asymmetry; precentral gyrus; primary motor cortex
Funding
- NCRR NIH HHS [RR-00165, P51 RR000165] Funding Source: Medline
- NICHD NIH HHS [P01 HD038051, HD-38051, P01 HD038051-050005] Funding Source: Medline
- NINDS NIH HHS [R01 NS036605, NS-42867, R01 NS042867, NS-36605, R01 NS042867-05, R01 NS036605-08] Funding Source: Medline
- EUNICE KENNEDY SHRIVER NATIONAL INSTITUTE OF CHILD HEALTH &HUMAN DEVELOPMENT [P01HD038051] Funding Source: NIH RePORTER
- NATIONAL CENTER FOR RESEARCH RESOURCES [P51RR000165] Funding Source: NIH RePORTER
- NATIONAL INSTITUTE OF NEUROLOGICAL DISORDERS AND STROKE [R01NS042867, R01NS036605] Funding Source: NIH RePORTER
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The neurobiology of handedness is still poorly understood in nonhuman primates. Recently, an association between hand preference and precentral gyrus morphology in chimpanzees was reported. The aim of this study was to further evaluate the association between handedness and asymmetries in the precentral gyrus of chimpanzees (Pan troglodytes) and to evaluate the association between hand preference and brain asymmetry using a different approach to the classification of handedness in chimpanzees. The overall results suggest that differences in handedness groups are specific to a region of the precentral gyrus commonly known as the knob and that subjects that show different hand preferences differ in brain asymmetries for specific regions of the primary motor cortex. Moreover, using a continuous scale of measurement rather than discrete classification of handedness, significant associations were found between hand use and asymmetries within the precentral gyrus. (c) 2006 Published by Elsevier Ltd.
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