卷尾猴（Cebus apella）使用工具的手偏好与初级运动皮层的不对称性有关。
Hand preference for tool-use in capuchin monkeys (Cebus apella) is associated with asymmetry of the primary motor cortex.
机构信息
Department of Psychology, Trinity University, San Antonio, TX 78212, USA.
出版信息
Am J Primatol. 2013 May;75(5):435-40. doi: 10.1002/ajp.22079. Epub 2012 Sep 14.
Abstract
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.
摘要
熟练的运动动作与人类的用手习惯和神经解剖学特化有关。最近的报告记录了一些非人类灵长类动物物种（包括黑猩猩和卷尾猴）中类似的神经解剖学不对称性及其与手偏好的关系。我们调查了卷尾猴是否在使用工具的任务中表现出明显的手偏好，以及这种偏好是否与大脑的运动处理区域有关。从 15 只猴子身上收集了用于蘸取工具使用任务的手性数据和高分辨率 3T MRI 扫描。卷尾猴在这种类型的工具使用中表现出明显的群体水平的左撇子偏好，并且手性与初级运动皮层的不对称性有关。惯用左手的个体在右半球显示出更深的中央沟。我们的结果表明，卷尾猴表现出对熟练运动的潜在右半球偏向。
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