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首页> 外文期刊>The European Journal of Neuroscience >Comparison of neuronal activity in the rostral supplementary and cingulate motor areas during a task with cognitive and motor demands.
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Comparison of neuronal activity in the rostral supplementary and cingulate motor areas during a task with cognitive and motor demands.

机译：比较具有认知和运动需求的任务期间，在眼部补充运动和扣带回运动区域的神经元活动。

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摘要

A number of cortical motor areas have been identified on the medial wall of the hemisphere in monkeys. However, their specific role in motor control remains unclear. In this study, we sought to describe and compare the functional properties of the presupplementary (pre-SMA) and rostral cingulate (CMAr) motor areas in two monkeys performing a visually instructed, delayed, sequential movement. We recorded 134 task-related neurons in the pre-SMA and 149 in the CMAr. The main difference between the two areas was the abundance of responses to targets (46%) in the pre-SMA, while CMAr activity was more related to reward (28%). Neuronal responses to targets were more phasic and higher in frequency in the pre-SMA than in the CMAr. During the delay, the percentage of neuronal responses was similar in the two areas. The discharge pattern was different depending upon whether the delay duration was fixed or variable but in most neurons was the same regardless of the sequence performed. Movement-related changes were common in the pre-SMA (75%) and in the CMAr (81%) but they occurred earlier in the former. Neurons activated exclusively during movement were more numerous in the CMAr. Finally, neuronal activity in the pre-SMA was more related to the sequential aspect of the task compared to the CMAr. Our results suggest that although the two areas share functional properties, they also participate in different aspects of motor behaviour. Their functional properties reflect their anatomical positions, which give them the potential to integrate external stimuli (pre-SMA) and internal states (CMAr) during motor planning.
机译：在猴子的半球内侧壁上已经发现了许多皮质运动区。但是，它们在电机控制中的具体作用仍不清楚。在这项研究中，我们试图描述和比较两只猴子在执行视觉指示的，延迟的，顺序运动的过程中的补充（pre-SMA）和延髓扣带回（CMAr）运动区域的功能特性。我们在SMA前期记录了134个与任务相关的神经元，在CMAr中记录了149个。这两个区域之间的主要区别是SMA前对靶标的反应丰富（46％），而CMAr活性与奖赏更为相关（28％）。与CMAr中相比，SMA前患者对靶标的神经元反应更具阶段性，频率更高。在延迟期间，两个区域的神经元反应百分比相似。放电模式取决于延迟时间是固定的还是可变的，但是在大多数神经元中，放电顺序是相同的，与执行的顺序无关。与运动相关的变化在SMA前（75％）和CMAr（81％）中很常见，但在前者中较早发生。在运动中专门激活的神经元在CMAr中更多。最后，与CMAr相比，前SMA中的神经元活动与任务的顺序方面更相关。我们的结果表明，尽管这两个区域具有功能特性，但它们也参与了运动行为的不同方面。它们的功能特性反映了它们的解剖位置，这使它们有可能在运动计划期间整合外部刺激（SMA前）和内部状态（CMAr）。

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