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首页> 外文期刊>The European Journal of Neuroscience >'Arm-reaching' neurons in the parietal area V6A of the macaque monkey.
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'Arm-reaching' neurons in the parietal area V6A of the macaque monkey.

机译：猕猴顶壁区V6A中的“到达臂”神经元。

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摘要

In previous experiments we have found that several cells of area V6A in the macaque superior parietal lobule were activated by small and stereotyped movements of the arms (C. Galletti, P. Fattori, D. F. Kutz & P. P. Battaglini, Eur. J. Neurosci., 1997, 9, 410). This behaviour was not accounted for by retinal information, nor by somatosensory inputs from the arms. We now want to investigate whether V6A neurons are modulated by purposeful movements aimed at reaching visual targets or targets located outside the field of view. V6A neuronal activity was collected while monkeys performed arm movements during an instructed-delay reaching task in darkness. The task required the animal to reach out for a visual target in the peripersonal space and to bring the hand back to its body. Quantitative analysis of neuronal activity carried out on 55 V6A neurons showed that: (i) the great majority of neurons (71%) was significantly modulated during the execution of arm movements; (ii) 30% of neurons were significantly modulated during preparation of reaching; and (iii) modulations during both execution and preparation of reaching occurred in the absence of any visual feedback and were not due to eye movements. V6A reach-related neurons could be useful in guiding the hand to reach its target with or without visual feedback.
机译：在先前的实验中，我们发现猕猴上顶小叶的V6A区域的几个细胞是通过手臂的小而定型的动作激活的（C. Galletti，P。Fattori，DF Kutz和PP Battaglini，Eur。J. Neurosci。， 1997，9，410）。视网膜信息或手臂的体感输入均不能解释这种行为。现在，我们要调查V6A神经元是否受到旨在达到视觉目标或视野外目标的有目的运动的调节。 V6A神经元活动被收集，而猴子则在黑暗中按指示延迟到达任务期间进行手臂运动。该任务要求动物伸出手以寻找人际空间中的视觉目标，并将手放回其身体。对55个V6A神经元进行的神经元活动的定量分析表明：（i）在执行手臂运动期间，绝大多数神经元（71％）被显着调节; （ii）30％的神经元在准备到达过程中受到显着调节; （iii）在执行和准备到达过程中发生的调节均在没有任何视觉反馈的情况下发生，并且不是由于眼球运动引起的。 V6A触及范围相关的神经元可能在引导手达到或不触及视觉的情况下有用。

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