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首页> 外文期刊>The European Journal of Neuroscience >Visual-vestibular interactive responses in the macaque ventral intraparietal area (VIP).
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Visual-vestibular interactive responses in the macaque ventral intraparietal area (VIP).

机译：猕猴腹顶壁内区域（VIP）的视觉-血管互动反应。

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Self-motion detection requires the interaction of a number of sensory systems for correct perceptual interpretation of a given movement and an eventual motor response. Parietal cortical areas are thought to play an important role in this function, and we have thus studied the encoding of multimodal signals and their spatiotemporal interactions in the ventral intraparietal area of macaque monkeys. Thereby, we have identified for the first time the presence of vestibular sensory input to this area and described its interaction with somatosensory and visual signals, via extracellular single-cell recordings in awake head-fixed animals. Visual responses were driven by large field stimuli that simulated either backward or forward self-motion (contraction or expansion stimuli, respectively), or movement in the frontoparallel plane (visual increments moving simultaneously in the same direction). While the dominant sensory modality in most neurons was visual, about one third of all recorded neurons responded to horizontal rotation. These vestibular responses were typically in phase with head velocity, but in some cases they could signal acceleration or even showed integration to position. The associated visual responses were always codirectional with the vestibular on-direction, i.e. noncomplementary. Somatosensory responses were in register with the visual preferred direction, either in the same or in the opposite direction, thus signalling translation or rotation in the horizontal plane. These results, taken together with data on responses to optic flow stimuli obtained in a parallel study, strongly suggest an involvement of area VIP in the analysis and the encoding of self-motion.
机译：自我运动检测需要大量传感系统的相互作用，以对给定运动和最终的运动反应进行正确的感知解释。人们认为顶皮质区域在此功能中起着重要作用，因此我们研究了猕猴腹顶壁区域内多峰信号的编码及其时空相互作用。因此，我们首次确定了该区域存在前庭感觉输入，并通过清醒的固定头动物中的细胞外单细胞记录描述了其与体感和视觉信号的相互作用。视觉反应是由大视野刺激驱动的，该刺激模拟了向前或向后的自我运动（分别为收缩或扩张刺激）或在额平行平面内的运动（视觉增量在同一方向上同时运动）。虽然大多数神经元的主要感觉方式是视觉的，但所有记录的神经元中约有三分之一对水平旋转作出了反应。这些前庭反应通常与头部速度同相，但是在某些情况下，它们可能表示加速或什至显示位置整合。相关的视觉反应总是与前庭的指向同向，即是非互补的。体感反应与相同或相反方向的视觉首选方向一致，从而指示水平面内的平移或旋转。这些结果，连同在平行研究中获得的对光流刺激的响应数据，强烈暗示了区域VIP参与了自运动的分析和编码。

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