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首页> 外文期刊>Proceedings of the National Academy of Sciences of the United States of America >Microstimulation reveals specialized subregions for different complex movements in posterior parietal cortex of prosimian galagos
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Microstimulation reveals specialized subregions for different complex movements in posterior parietal cortex of prosimian galagos

机译：微刺激揭示了Prosimian galagos后顶叶皮层中不同复杂运动的专门区域

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摘要

Posterior parietal cortex of prosimian galagos consists of a caudal half characterized by connections with visual cortex and a rostral half connected with motor, premotor, and visuomotor areas of frontal cortex. When 500-ms trains of electrical pulses were used to stimulate microelectrode sites throughout posterior parietal cortex, movements were elicited only from the rostral half. The movement zone reflected an overall pattern of somatotopy, from eye and face movements most ventrally to hindlimb movements most dorsally. In addition, subregions or zones of this movement cortex seemed to be devoted to components of different, etho-logically significant behaviors. Thus, microstimulation within separate zones of cortex elicited reaching, hand-to-mouth, defensive, or aggressive movements. The finding of similar classes of elicited movement patterns from frontal and more recently intraparietal cortex of macaques suggests that multiareal circuits for biologically significant behaviors are components of all primate brains and that these circuits can be activated by long trains of current pulses at rostral locations in posterior parietal cortex.
机译：猿猴前顶叶的后顶叶皮层由特征在于视觉皮层的尾半部和与额叶皮层的运动，前运动和视觉运动区相连的延髓部组成。当使用500毫秒的电脉冲序列刺激整个顶叶后皮质的微电极部位时，仅从头端的一半引起运动。运动区域反映了躯体解剖学的整体模式，从最腹侧的眼睛和面部运动到最背侧的后肢运动。此外，该运动皮层的子区域或区域似乎专用于具有不同的，具有生态学意义的行为的组成部分。因此，在单独的皮质区域内的微刺激引起了伸手，手对嘴，防御性或攻击性运动。从猕猴的额叶和最近的顶叶内皮质发现相似类别的引起的运动模式的发现表明，具有重要生物学行为的多区域电路是所有灵长类动物大脑的组成部分，并且这些电路可以被后方在大脑前部位置的长电流脉冲激活。顶叶皮层

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