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首页> 外文期刊>The European Journal of Neuroscience >Interaction of linear vestibular and visual stimulation in the macaque ventral intraparietal area (VIP).
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Interaction of linear vestibular and visual stimulation in the macaque ventral intraparietal area (VIP).

机译：猕猴腹顶壁内区域（VIP）中线性前庭和视觉刺激的相互作用。

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摘要

Navigation in space requires the brain to combine information arising from different sensory modalities with the appropriate motor commands. Sensory information about self-motion in particular is provided by the visual and the vestibular system. The macaque ventral intraparietal area (VIP) has recently been shown to be involved in the processing of self-motion information provided by optical flow, to contain multimodal neurons and to receive input from areas involved in the analysis of vestibular information. By studying responses to linear vestibular, visual and bimodal stimulation we aimed at gaining more insight into the mechanisms involved in multimodal integration and self-motion processing. A large proportion of cells (77%) revealed a significant response to passive linear translation of the monkey. Of these cells, 59% encoded information about the direction of self-motion. The phase relationship between vestibular stimulation and neuronal responses covered a broad spectrum, demonstrating the complexity of the spatio-temporal pattern of vestibular information encoded by neurons in area VIP. For 53% of the direction-selective neurons the preferred directions for stimuli of both modalities were the same; they were opposite for the remaining 47% of the neurons. During bimodal stimulation the responses of neurons with opposite direction selectivity in the two modalities were determined either by the visual (53%) or the vestibular (47%) modality. These heterogeneous responses to unimodal and bimodal stimulation might be used to prevent misjudgements about self- and/or object-motion, which could be caused by relying on information of one sensory modality alone.
机译：在太空中航行需要大脑将来自不同感觉方式的信息与适当的运动命令相结合。视觉和前庭系统尤其提供有关自我运动的感觉信息。猕猴腹顶壁区域（VIP）最近已显示出参与光流提供的自我运动信息的处理，包含多峰神经元并从参与前庭信息分析的区域接收输入。通过研究对线性前庭，视觉和双峰刺激的反应，我们旨在深入了解参与多峰整合和自我运动处理的机制。很大比例的细胞（77％）显示出对猴子被动线性翻译的显着反应。在这些细胞中，有59％对有关自我运动方向的信息进行了编码。前庭刺激与神经元反应之间的相位关系涵盖了广泛的范围，这说明了VIP区神经元编码的前庭信息时空模式的复杂性。对于53％的方向选择神经元，两种模态刺激的首选方向是相同的。其余47％的神经元则相反。在双峰刺激过程中，两种方式中具有相反方向选择性的神经元的响应取决于视觉（53％）或前庭（47％）方式。这些对单峰和双峰刺激的异质反应可用于防止对自我和/或物体运动的错误判断，这种错误判断可能是仅依靠一种感觉方式的信息而引起的。

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