Alais David, Keys Robert, Verstraten Frans A J, Paffen Chris L E
School of Psychology, The University of Sydney, Sydney, NSW 2006, Australia.
Department of Experimental Psychology & Helmholtz Institute, Utrecht University, 3584 CS Utrecht, the Netherlands.
iScience. 2021 Nov 10;24(12):103417. doi: 10.1016/j.isci.2021.103417. eCollection 2021 Dec 17.
Multisensory integration helps the brain build reliable models of the world and resolve ambiguities. Visual interactions with sound and touch are well established but vestibular influences on vision are less well studied. Here, we test the vestibular influence on vision using horizontally opposed motions presented one to each eye so that visual perception is unstable and alternates irregularly. Passive, whole-body rotations in the yaw plane stabilized visual alternations, with perceived direction oscillating congruently with rotation (leftward motion during leftward rotation, and ). This demonstrates a purely vestibular signal can resolve ambiguous visual motion and determine visual perception. Active self-rotation following the same sinusoidal profile also entrained vision to the rotation cycle - more strongly and with a lesser time lag, likely because of efference copy and predictive internal models. Both experiments show that visual ambiguity provides an effective paradigm to reveal how vestibular and motor inputs can shape visual perception.
多感官整合有助于大脑构建可靠的世界模型并解决模糊性问题。视觉与声音和触觉的相互作用已得到充分证实，但前庭对视觉的影响研究较少。在此，我们通过向每只眼睛呈现水平相反的运动来测试前庭对视觉的影响，以使视觉感知不稳定且不规则地交替。在偏航平面内的被动全身旋转稳定了视觉交替，感知方向与旋转一致振荡（向左旋转时向左运动，反之亦然）。这表明纯粹的前庭信号可以解决模糊的视觉运动并确定视觉感知。遵循相同正弦曲线轮廓的主动自我旋转也使视觉与旋转周期同步——更强且时间滞后更小，这可能是由于传出副本和预测性内部模型。这两个实验都表明，视觉模糊性为揭示前庭和运动输入如何塑造视觉感知提供了一个有效的范例。
