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首页> 外文期刊>Acta neurobiologiae experimentalis >Cortical mechanisms of goal-directed motor acts in the Rhesus monkey
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Cortical mechanisms of goal-directed motor acts in the Rhesus monkey

机译：恒河猴目标定向运动的皮质机制

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Multineuronal activity from the frontal cortex (s. principalis) and the motor cortex (g. precentralis) in the Rhesus monkey during the goal-directed performance was recorded. The experimental sequence comprised a chain of signals securing adequate behavioral performance. The sequence began with an anticipatory signal, then the conditioned signal was switched on, a lamp in either the right or the left key, and after a 5-10 s delay, a trigger signal opening a screen followed. Then the monkey had to press the key indicated by light and grasp the food from a box. Differences in the average firing rate and in the patterns of response were observed by comparing the unit activity during the CS expectancy with the trigger signal expectancy (delay). A mathematical treatment of the unit firing pattern allowed us to select specific firing pattern rearrangements likely to be involved in the short-term memory mechanisms, i.e. intracortical reverberation and successive recruitment of neuronal populations. Unit activity of s. principalis in one hemisphere depended on the CS right vs. left location. Similar differences were found for the delays. During the delay, information about the CS spatial location is probably stored as short-term traces in the units of s. principalis. The frontal cortex unitary responses elicited by the trigger signal depended on the direction of the subsequent movement. The motor cortex units provided less pronounced differences in .response to the trigger. In contrast to the motor cortex units, some frontal cortex units reacted only to the presence of food reward.
机译：记录了在目标定向表演期间恒河猴的额叶皮层（s.principalis）和运动皮层（g。precentralis）的多神经元活动。实验序列包括确保适当的行为表现的信号链。该序列以预期信号开始，然后打开条件信号，并在左右键上点亮灯，并在5-10 s延迟后，触发信号打开屏幕。然后，猴子必须按下灯光指示的键并从盒子里抓食物。通过比较CS期望值期间的单位活动性与触发信号期望值（延迟），可以观察到平均发射速率和响应模式的差异。单位放电模式的数学处理使我们能够选择可能与短期记忆机制有关的特定放电模式重排，即皮质内混响和神经元种群的连续募集。的单位活动。一个半球中的本金取决于CS右位置与左位置。对于延迟，发现了类似的差异。在延迟期间，有关CS空间位置的信息可能以s为单位作为短期轨迹存储。原理触发信号引起的额叶皮质整体反应取决于后续运动的方向。运动皮层单元对触发器的响应差异较小。与运动皮质单元相反，一些额叶皮质单元仅对食物奖励存在反应。

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