Greater variability in chimpanzee (Pan troglodytes) brain structure among males.

ABSTRACT: Across the animal kingdom, males tend to exhibit more behavioural and morphological variability than females, consistent with the 'greater male variability hypothesis'. This may reflect multiple mechanisms operating at different levels, including selective mechanisms that produce and maintain variation, extended male development, and X chromosome effects. Interestingly, human neuroanatomy shows greater male variability, but this pattern has not been demonstrated in any other species. To address this issue, we investigated sex-specific neuroanatomical variability in chimpanzees by examining relative and absolute surface areas of 23 cortical sulci across 226 individuals (135F/91M), using permutation tests of the male-to-female variance ratio of residuals from MCMC generalized linear mixed mo

SUBMITTER: DeCasien AR 

PROVIDER: S-EPMC7211446 | biostudies-literature | 2020 Apr

REPOSITORIES: biostudies-literature