Histological asymmetries of primary motor cortex predict handedness in chimpanzees (Pan troglodytes).

Histological asymmetries of primary motor cortex predict handedness in chimpanzees (Pan troglodytes). Research Abstract Details 

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Histological asymmetries of primary motor cortex predict handedness in chimpanzees (Pan troglodytes). Abstract Text:

Chet C Sherwood,Elizabeth Wahl,Joseph M Erwin,Patrick R Hof,William D Hopkins,

Like humans, chimpanzees display robust and consistent hand preferences during the performance of certain tasks. Although correlations have been demonstrated between gross anatomic measures of primary motor cortex asymmetry and handedness in captive chimpanzees, the relationship between histological architecture and behavioral lateralization has not yet been investigated. Therefore, we examined interhemispheric asymmetry of several different microstructural characteristics of the primary motor cortex in the region of hand representation from 18 chimpanzees tested on a coordinated bimanual task before death. At the population level our data showed leftward bias for higher layer II/III neuron density. Of note, however, there was no population-level asymmetry in the areal fraction of Nissl-stained cell bodies, a finding that differs from previous studies of this cortical region in humans. Nonetheless, we found that asymmetry in the density of layer II/III parvalbumin-immunoreactive interneurons was the best predictor of individual hand preference. These results suggest that histological asymmetries are related to handedness in chimpanzees, while overall patterns of asymmetry at the population level might differ from humans.

Histological asymmetries of primary motor cortex predict handedness in chimpanzees (Pan troglodytes). Publishing Authors By Initials

CC Sherwood,E Wahl,JM Erwin,PR Hof,WD Hopkins,

For similar surgical procedures, operative: neurosurgical procedures: stereotaxic techniques research abstracts see: surgical procedures, operative: neurosurgical procedures: stereotaxic techniques research

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Histological asymmetries of primary motor cortex predict handedness in chimpanzees (Pan troglodytes). Journal Published:

PUBLICATION TYPE: Research Support, U.S. Gov't,

Journal: The Journal of comparative neurology

VOLUME: 503

Page Numbers: 525-37

Journal Abbreviation: J. Comp. Neurol.

ISSN: 0021-9967

DAY: 1

MONTH: Aug

YEAR: 2007

Histological asymmetries of primary motor cortex predict handedness in chimpanzees (Pan troglodytes). Information

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LANGUAGE: eng

NlmUniqueID: 406041

Histological asymmetries of primary motor cortex predict handedness in chimpanzees (Pan troglodytes). Keywords Mesh Terms:

KEYWORDS: Stereotaxic Techniques

MESH TERMS: metabolism

Chemical & Substance for Abstract: Histological asymmetries of primary motor cortex predict handedness in chimpanzees (Pan troglodytes). Information

Substance Name: Parvalbumins

Registry Number: 0

Grant and Affiliation Information for Histological asymmetries of primary motor cortex predict handedness in chimpanzees (Pan troglodytes).

AFFILIATION: Department of Anthropology, The George Washington University, 2110 G Street NW, Washington, DC 20052, USA. sherwood@gwu.edu

Country: United States

AGENCY: United States NINDS

GRANT: NS 42867

ACRONYM: NS

MEDLINETA: J Comp Neurol

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