Phillips Kimberley A, Sherwood Chet C
Department of Psychology, Hiram College, Hiram, OH 44234, USA.
Neuropsychologia. 2007 Jun 11;45(10):2398-401. doi: 10.1016/j.neuropsychologia.2007.02.021. Epub 2007 Mar 4.
Cerebral asymmetries are thought to be associated with increased hemispheric specialization of function. We investigated cerebral petalias, the protrusion of one cerebral hemisphere relative to the other, and their relationship to lateralized behavior in capuchin monkeys (Cebus apella). Magnetic resonance images of the brain and behavioral data on a coordinated bimanual task were obtained from 13 capuchins. While a significant population-level left-frontal petalia was found, this was not related to handedness. The role of the morphologically asymmetric frontal cortex in capuchins is unclear, but may reflect developmental gradients or directional selection for various behavioral functions, such as extractive foraging or social group complexity.
大脑不对称被认为与半球功能特化增强有关。我们研究了卷尾猴(僧帽猴属)的大脑花瓣征,即一个大脑半球相对于另一个半球的突出情况,以及它们与偏侧行为的关系。从13只卷尾猴身上获取了大脑的磁共振图像和一项双手协调任务的行为数据。虽然发现了显著的群体水平的左额叶花瓣征,但这与用手习惯无关。卷尾猴形态不对称的额叶皮质的作用尚不清楚,但可能反映了各种行为功能(如取食性觅食或社会群体复杂性)的发育梯度或定向选择。