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首页> 外文期刊>Progress in brain research >Distributed processing in the motor system: spinal cord perspective.
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Distributed processing in the motor system: spinal cord perspective.

机译：电机系统中的分布式处理：脊髓透视图。

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Recordings of spinal INs during a flexion/extension wrist task with an instructed delay period have shown directly that many spinal neurons modulate their rate during the preparatory period soon after a visual cue. The onset time and the relation between the delay period activity of spinal INs and the ensuing movement response suggest that this type of activity is not simply related to the forthcoming motor action, but rather reflects a correct match between the visual cue and the motor response. The existence of such activity further supports the notion that the motor system operates in a parallel mode of processing, so that even during early stages of motor processing multiple centers are activated regardless of their anatomical distance from muscles. The firing properties of spinal INs during the performance of the task seem to differ from the comparable properties of motor cortical cells. Spinal INs fire in a highly regular manner--their CV is substantially lower than the observed CV of cortical cells. Also, although neighboring cells tend to have similar response properties, the frequency of significant correlation is lower than for cortical cells and the anatomical extent of the correlation seems to be narrower. The similarity and differences between cortical and spinal cells in terms of response and firing properties suggests that while both type of cells are active in parallel throughout the behavioral phases of the motor task, each may operate in a different mode of information processing.
机译：在指示的延迟时间段内进行的腕部伸展/伸展手腕任务期间，对脊髓IN的记录直接表明，视觉提示后不久，在准备期间，许多脊髓神经元会调节其速率。发作时间以及脊髓IN的延迟期活动与随后的运动反应之间的关系表明，这种活动不仅与即将发生的运动动作有关，而且反映了视觉提示与运动反应之间的正确匹配。这种活动的存在进一步支持了电机系统以并行处理模式运行的观点，因此，即使在电机处理的早期阶段，无论其与肌肉的解剖距离如何，都将激活多个中心。在执行任务期间，脊髓IN的发射特性似乎与运动皮层细胞的可比较特性不同。脊髓INs高度规则地发射-它们的CV显着低于观察到的皮质细胞CV。另外，尽管相邻细胞趋于具有相似的响应特性，但是显着相关的频率低于皮质细胞，并且相关的解剖学范围似乎更窄。皮质和脊髓细胞之间在响应和击发特性方面的相似性和差异表明，尽管两种类型的细胞在整个运动任务的行为阶段均处于并行活动状态，但每种细胞可能以不同的信息处理模式运行。

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