Contract grant sponsor: National Institute of Neurological Disorders and Stroke; Contract grant number: NS070717-01; Contract grant sponsor: CTSA Imaging Supplement; Contract grant number: UL1RR025767.
Hand Preference for Tool-Use in Capuchin Monkeys (Cebus apella) Is Associated With Asymmetry of the Primary Motor Cortex
Article first published online: 14 SEP 2012
© 2012 Wiley Periodicals, Inc.
American Journal of Primatology
Special Issue: Special Section on Primate Neuroethology
Volume 75, Issue 5, pages 435–440, May 2013
How to Cite
PHILLIPS, K. A. and THOMPSON, C. R. (2013), Hand Preference for Tool-Use in Capuchin Monkeys (Cebus apella) Is Associated With Asymmetry of the Primary Motor Cortex. Am. J. Primatol., 75: 435–440. doi: 10.1002/ajp.22079
- Issue published online: 25 MAR 2013
- Article first published online: 14 SEP 2012
- Manuscript Accepted: 20 AUG 2012
- Manuscript Revised: 7 AUG 2012
- Manuscript Received: 3 MAY 2012
- National Institute of Neurological Disorders and Stroke. Grant Number: NS070717-01
- CTSA Imaging Supplement. Grant Number: UL1RR025767
- hemispheric specialization;
Skilled motor actions are associated with handedness and neuroanatomical specializations in humans. Recent reports have documented similar neuroanatomical asymmetries and their relationship to hand preference in some nonhuman primate species, including chimpanzees and capuchin monkeys. We investigated whether capuchins displayed significant hand preferences for a tool-use task and whether such preferences were associated with motor-processing regions of the brain. Handedness data on a dipping tool-use task and high-resolution 3T MRI scans were collected from 15 monkeys. Capuchins displayed a significant group-level left-hand preference for this type of tool use, and handedness was associated with asymmetry of the primary motor cortex. Left-hand preferent individuals displayed a deeper central sulcus in the right hemisphere. Our results suggest that capuchins show an underlying right-hemisphere bias for skilled movement. Am. J. Primatol. 75:435-440, 2013. © 2012 Wiley Periodicals, Inc.