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首页> 外文期刊>The Journal of Neuroscience: The Official Journal of the Society for Neuroscience >Variation, signal, and noise in cerebellar sensory-motor processing for smooth-pursuit eye movements.
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Variation, signal, and noise in cerebellar sensory-motor processing for smooth-pursuit eye movements.

机译：小脑感觉运动处理中的变化，信号和噪声，可顺畅地追求眼球运动。

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摘要

Neural responses are variable, yet motor performance can be quite precise. To ask how neural signal and noise are processed in the brain during sensory-motor behavior, we have evaluated the trial-by-trial variation of Purkinje cell (PC) activity in the floccular complex of the cerebellum, an intermediate stage in the neural circuit for smooth-pursuit eye movements. We find strong correlations between small trial-by-trial variations in the simple spike activity of individual PCs and the eye movements at the initiation of pursuit. The correlation is lower but still present during steady-state pursuit. Recordings from a few pairs of PCs verified the predictions of a model of the PC population, that there is a transition from highly covariant PC activity during movement initiation to more independent activity later on. Application to the data of a theoretical and computational analysis suggests that variation in pursuit initiation arises mostly from variation in visual motion signals that provide common inputs to the PC population. Variation in eye movement during steady-state pursuit can be attributed primarily to signal-dependent motor noise that arises downstream from PCs.
机译：神经反应是可变的，但是运动表现可以非常精确。为了询问在感觉运动行为期间大脑中神经信号和噪声是如何处理的，我们评估了小脑絮状复合体（神经回路的中间阶段）中浦肯野细胞（PC）活性的逐次试验变化。追求顺滑的眼球运动。我们发现个体PC的简单峰值活动中的逐次试验性变化与追踪开始时的眼球运动之间存在很强的相关性。相关性较低，但在稳态追踪过程中仍然存在。来自几对PC的记录证实了PC种群模型的预测，即从运动启动期间的高度协变PC活动过渡到后来的更独立的活动。在理论和计算分析的数据中的应用表明，追随启动的变化主要是由视觉运动信号的变化引起的，该运动信号为PC群体提供了共同的输入。稳态追踪期间眼动的变化主要归因于PC下游产生的与信号有关的电机噪声。

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