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首页> 外文期刊>The Journal of Neuroscience: The Official Journal of the Society for Neuroscience >Neural dynamics in monkey parietal reach region reflect context-specific sensorimotor transformations.
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Neural dynamics in monkey parietal reach region reflect context-specific sensorimotor transformations.

机译：猴子间达达地区的神经动力学反映了上下文特定的传感器变换。

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摘要

We investigated the neural dynamics of sensorimotor transformations in the parietal reach region (PRR) of monkeys. To dissociate sensory from motor goal representations, we used a memory-guided anti-reach task. The monkeys had to reach either to a visually instructed, memorized peripheral target position (pro-reach) or to a diametrically opposed position (anti) while keeping central ocular fixation. Pro- and anti-reaches were randomly interleaved and indicated by a color instruction from the beginning of each trial. We analyzed spatiotemporal single-cell tuning and performed time-resolved population decoding to quantify the dynamic representation of the spatial visual cue, the reach goal, and the currently valid task rule (pro/anti mapping). Sensory information regarding the visual cue position was represented weakly during a short period of cue visibility. PRR predominantly encoded the reach goal from the end of the cue period on. The representation of the reach goal in the memory task evolves later for the anti- compared with pro-reaches, consistent with a 40-50 ms difference in reaction time between the two task rules. The task rule could be decoded before the appearance of the spatial cue, which indicates that abstract rule information is present in PRR that is independent of spatial cue or motor goal representations. Our findings support the hypothesis that PRR immediately translates current sensory information into reach movement plans, rather than storing the memorized cue location in the instructed-delay task. This finding indicates that PRR represents integrated knowledge on spatial sensory information combined with abstract behavioral rules to encode the desired movement goal.
机译：我们调查了猴子的顶部到达区域（PRR）中的传感器变换的神经动态。要从电机目标表示中解散感觉，我们使用了记忆引导的反达任务。猴子必须达到视觉上指导的，记忆的外围目标位置（促进）或径向相对的位置（反），同时保持中央眼睛固定。从每次试验开始时，可​​以随机地交错并通过颜色指令表示。我们分析了时空单小区调谐，并执行了时间分辨的人口解码，以量化空间视觉提示，到达目标和当前有效的任务规则的动态表示（Pro / Anti-Mapping）。关于视觉提示位置的感官信息在短时间内的提示可见性期间弱。 PRR主要从暗示期间延伸地编码了到达目标。内存任务中的达到目标的表示随后与前达到的抗比施加，这与两个任务规则之间的反应时间40-50 ms差异一致。任务规则可以在空间提示的外观之前解码，这表明PRR中存在抽象规则信息，其与空间提示或电机目标表示。我们的调查结果支持假设PRR立即将当前的感官信息转换为达到运动计划，而不是将记忆的提示位置存储在指示延迟任务中。此发现表明，PRR表示关于空间感官信息的综合知识与抽象行为规则相结合以编码所需的运动目标。

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