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首页> 外文期刊>Chinese journal of physiological sciences >SUPPLEMENTARY MOTOR CORTEX NEURONAL ACTIVITY IN FIGURE RECOGNITION GUIDED SEQUENTIAL MOVEMENTS
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SUPPLEMENTARY MOTOR CORTEX NEURONAL ACTIVITY IN FIGURE RECOGNITION GUIDED SEQUENTIAL MOVEMENTS

机译：图形识别引导顺序运动中的辅助运动皮质神经元活动

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The role of supplementary motor area (SMA) in spatial motor sequence on the basis of memory has been basically established. However, very little is known up to now about the role of SMA in motor performance in human life based upon sequential recognition of the word alphabetic order or other ordered symbolic arrangements such as during copying, typing, sight-reading musical notes and so on. Thus, we trained two rhesus monkeys to learn the two different motor sequence tasks respectively denoted as figure recognition (motor) sequence (FRS) and memorized spatial (motor) sequence (MSS) in correlation to the neu-ronal activity in SMA during the various phases of performance of the two tasks. For the PRS task, the screen in front of the animal was turnedto bright white for 500 ms as a cue (cue period) to signify the coming of one of the three kinds of arrangement of a cross, a square and a triangle (A) of equal size located at the three corners of an equilateral triangle (image period). The three kindsof configuration were presented semi-randomly, but the animal had to touch the three figures in the order of as correct response. In the MSS task, three similar round white spots of equal area were used and similarly presented at the corners of the equilateral triangle 500 ms after the appearance of cue signal which may be either green or red and the animal was trained to touch the spots respectively in the order of right-left-up (RLU) and left-up-right (LUR) as correct response. Neuronal activity during the cue period, the image period, and the response period of either the tasks were recorded, all data were stored and analyzed by a computer. Postmortem histological examination confirmed that 376 recorded neurons were in the SMA, among which, 215 wererelated to FRS task and 229 to MSS task. In the FRS task, changes in neuronal discharge took place in 52.1%, 78.1% and 82.3% of the cases respectively during the cue period, the image period and the response period, while in the MSS task, the respectivevalues were 49.8%, 70.7% and 84.3%. In either kind of tasks, a neuron might show bias in changes of its firing rate towards the cue for certain sequence and towards certain sequence of hand movements. The above results indicate that SMA cortex participates in addition to neural mechanism of memorized spatial motor sequence, also in the motor sequence guided by direct visual figure recognition.
机译：基本建立了基于记忆的补充运动区域（SMA）在空间运动序列中的作用。但是，到目前为止，人们对SMA在人类单词中的顺序识别或其他有序的符号排列（例如在复制，打字，阅读音符等过程中）的顺序识别方面，在人类生活中的运动表现中所起的作用知之甚少。因此，我们训练了两只恒河猴来学习两种不同的运动序列任务，分别表示为图形识别（运动）序列（FRS）和记忆的空间（运动）序列（MSS），与各种运动中SMA的神经活动相关。两个任务的执行阶段。对于PRS任务，将动物前面的屏幕切换为亮白色并持续500 ms，作为提示（提示时间），以表示十字架，正方形和三角形这三种排列之一的到来（A）等大小的三角形位于等边三角形的三个角（图像周期）。这三种配置是半随机呈现的，但动物必须按正确响应的顺序触摸三个图形。在MSS任务中，使用了三个面积相等的相似的圆形白色斑点，并在提示信号出现后500毫秒以相同的方式呈现在等边三角形的拐角处，该信号可能是绿色或红色，并且训练了动物分别触摸这些斑点以正确的顺序从右上左（RLU）和左上右（LUR）排列。记录提示期，图像期和任务响应期的神经元活动，所有数据均存储并通过计算机进行分析。死后组织学检查证实SMA中有376个记录的神经元，其中有215个与FRS任务有关，有229个与MSS任务有关。在FRS任务中，在提示期，图像期和响应期中，神经元放电的发生率分别为52.1％，78.1％和82.3％，而在MSS任务中，其值分别为49.8％，70.7和70.7。 ％和84.3％。在这两种任务中，神经元可能会朝着提示的特定顺序和手部动作的特定顺序显示其发射速率的变化。以上结果表明，除了记忆的空间运动序列的神经机制外，SMA皮质还参与了直接视觉图形识别指导的运动序列。

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