Taylor J Eric T, Gozli Davood G, Chan David, Huffman Greg, Pratt Jay
Department of Psychology, University of Toronto, Toronto, Ontario, Canada.
Transl Neurosci. 2014 Nov 7;6(1):1-7. doi: 10.1515/tnsci-2015-0001. eCollection 2015.
A growing body of evidence demonstrates that human vision operates differently in the space near and on the hands; for example, early findings in this literature reported that rapid onsets are detected faster near the hands, and that objects are searched more thoroughly. These and many other effects were attributed to enhanced attention via the recruitment of bimodal visual-tactile neurons representing the hand and near-hand space. However, recent research supports an alternative account: stimuli near the hands are preferentially processed by the action-oriented magnocellular visual pathway at the expense of processing in the parvocellular pathway. This Modulated Visual Pathways (MVP) account of altered vision near the hands describes a hand position-dependent trade-off between the two main retinal-cortical visual pathways between the eye and brain. The MVP account explains past findings and makes new predictions regarding near-hand vision supported by new research.
越来越多的证据表明，人类视觉在手部及其附近空间的运作方式有所不同；例如，该领域早期研究结果表明，在手部附近能更快检测到快速出现的事物，并且对物体的搜索也更彻底。这些以及许多其他效应被归因于通过招募代表手部和手部附近空间的双模式视觉 - 触觉神经元而增强的注意力。然而，最近的研究支持另一种解释：手部附近的刺激优先由以行动为导向的大细胞视觉通路进行处理，而代价是小细胞通路的处理。这种关于手部附近视觉改变的调制视觉通路（MVP）解释描述了眼睛和大脑之间两条主要视网膜 - 皮质视觉通路之间基于手部位置的权衡。MVP 解释了过去的研究结果，并对近期研究所支持的手部附近视觉做出了新的预测。
