Sex differences in the relationship between planum temporale asymmetry and corpus callosum morphology in chimpanzees (Pan troglodytes): A combined MRI and DTI analysis

NEUROPSYCHOLOGIA

卷:93

Article

Hopkins, William D.^1,2,3  Hopkins, Anna M.³  Misiura, Maria⁴  Latash, Elitaveta M.^1,2  Mareno, Mary Catherine⁵  Schapiro, Steven J.⁵  Phillips, Kimberley A.⁶ 

[1] Georgia State Univ, Inst Neurosci, Atlanta, GA 30302 USA

[2] Georgia State Univ, Language Res Ctr, Atlanta, GA 30302 USA

[3] Yerkes Natl Primate Res Ctr, Div Dev & Cognit Neurosci, Atlanta, GA 30329 USA

[4] Georgia State Univ, Dept Psychol, Atlanta, GA 30302 USA

[5] Univ Texas MD Anderson Canc Ctr, Dept Vet Sci, Bastrop, TX 78602 USA

[6] Trinity Univ, Dept Psychol, San Antonio, TX 78212 USA

关键词: Corpus callosum;    Planum temporale;    Brain asymmetry;    Primates;   

DOI  :  10.1016/j.neuropsychologia.2016.04.003

来源: Elsevier

【 摘 要 】

Increases brain size has been hypothesized to be inversely associated with the expression of behavioral and brain asymmetries within and between species. We tested this hypothesis by analyzing the relation between asymmetries in the planum temporale (PT) and different measures of the corpus callosum (CC) including surface area, streamline count as measured from diffusion tensor imaging, fractional anisotropy values and the ratio in the number of fibers to surface area in a sample of chimpanzees. We found that chimpanzees with larger PT asymmetries in absolute terms had smaller CC surface areas, fewer streamlines and a smaller ratio of fibers to surface area. These results were largely specific to male but not female chimpanzees. Our results partially support the hypothesis that brain asymmetries are linked to variation in corpus callosum morphology, although these associations may be sex-dependent. (C) 2016 Elsevier Ltd. All rights reserved.

【 授权许可】

Free