Trotter Y
Centre de Recherche Cerveau et Cognition, CNRS, Faculté de Médecine de Rangueil, Université Paul Sabatier, Toulouse, France.
Perception. 1995;24(3):287-98. doi: 10.1068/p240287.
Perception of real depth includes information on stereopsis and distance. How both interact in the visual pathway was the subject of a study performed on the behaving monkey. Neurons in the primary visual cortex (area V1) have their activity, visual and/or spontaneous, modulated by the viewing distance. Disparity selectivity may be present or better expressed at a given viewing distance. This modulation is independent of the visual pattern. The use of prisms shows that vergence is implicated in this phenomenon. Consequently, extraretinal signals related to ocular motility have access to area V1. Among them, proprioceptive signals from the eye muscles have been shown to be involved in visual cortical function and in the development of depth perception. It is possible that the same signals may also be involved in the distance modulation shown in V1 neurons, but this remains to be examined. A possible specialisation of disparity-selective cells in different cortical areas is discussed.
对真实深度的感知包括立体视觉和距离方面的信息。两者在视觉通路中如何相互作用是一项针对行为猴进行的研究的主题。初级视觉皮层（V1区）中的神经元，其视觉活动和/或自发活动会受到观察距离的调节。在给定的观察距离下，视差选择性可能存在或表现得更明显。这种调节与视觉模式无关。使用棱镜表明辐辏参与了这一现象。因此，与眼球运动相关的视网膜外信号能够进入V1区。其中，来自眼肌的本体感受信号已被证明参与视觉皮层功能以及深度感知的发展。相同的信号也可能参与V1神经元中显示的距离调节，但这仍有待研究。本文还讨论了不同皮层区域中视差选择性细胞可能存在的特化情况。
