Sex and handedness effects on corpus callosum morphology in chimpanzees (Pan troglodytes)
Sex and handedness effects on corpus callosum morphology in chimpanzees (Pan troglodytes)
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DOI：
10.1037/0735-7044.120.5.1025
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发表时间：
2006-10-01
影响因子：
1.9
通讯作者：
Hopkins, William D.
中科院分区：
文献类型：
--
作者：
Dunham, Leslie A.;Hopkins, William D.
Findings suggest that in humans, sex and hand preference may be associated with the size of the corpus callosum (CC). The authors measured CC morphology from MRIs in 67 chimpanzees (Pon troglodytes) to see whether similar effects were present in this species. Hand preference was assessed by performance on 4 tasks, and chimpanzees were classified as left-handed, right-handed, or ambidextrous. In a subsequent analysis, the chimpanzees were reclassified into 2 groups: right-handed and left-handed. The results revealed no sex difference in CC area, but significant effects of hand preference were found for several CC regions (rostrum body, anterior midbody, posterior midbody, isthmus, and splenium) and for overall CC size, with left-handed chimpanzees exhibiting significantly smaller CC measurements than right-handed chimpanzees. The results indicate that lateralized hand use in chimpanzees, as in humans, is associated with variation in CC size.
