Each movement we make activates our own sensory receptors, thus causing a problem for the brain: the spurious, movement-related sensations must be discriminated from the sensory inputs that really matter, those representing our environment. Here we consider circuits for solving this problem in the primate brain. Such circuits convey a copy of each motor command, known as a corollary discharge (CD), to brain regions that use sensory input. In the visual system, CD signals may help to produce a stable visual percept from the jumpy images resulting from our rapid eye movements. A candidate pathway for providing CD for vision ascends from the superior colliculus to the frontal cortex in the primate brain. This circuit conveys warning signals about impending eye movements that are used for planning subsequent movements and analyzing the visual world. Identifying this circuit has provided a model for studying CD in other primate sensory systems and may lead to a better understanding of motor and mental disorders.

中文翻译：

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用于内部运动监测的脑回路。

我们所做的每一个动作都会激活我们自己的感觉受体，从而给大脑带来问题：必须将虚假的、与运动相关的感觉与真正重要的感觉输入区分开来，这些输入代表我们的环境。在这里，我们考虑解决灵长类大脑中这个问题的电路。这种电路将每个运动命令的副本（称为必然放电 (CD)）传送到使用感觉输入的大脑区域。在视觉系统中，CD 信号可能有助于从我们快速眼球运动产生的跳跃图像中产生稳定的视觉感知。为视觉提供 CD 的候选途径从上丘上升到灵长类大脑中的额叶皮层。该电路传达关于即将发生的眼球运动的警告信号，用于规划后续运动和分析视觉世界。