Krock Rebecca M, Moore Tirin
Department of Neurobiology, Stanford University School of Medicine, Stanford, California 94305.
Department of Neurobiology, Stanford University School of Medicine, Stanford, California 94305 Howard Hughes Medical Institute, Stanford University School of Medicine, Stanford, California 94305
Cold Spring Harb Symp Quant Biol. 2014;79:123-30. doi: 10.1101/sqb.2014.79.024836. Epub 2015 Mar 9.
Primates make several saccadic eye movements each second, and yet the retinal motion these movements generate goes unnoticed. Saccadic suppression is a profound loss of visual sensitivity occurring around the time of eye movements, and it is thought to contribute to visual stability by blunting the perception of self-generated motion. Neurophysiological studies have produced evidence that neurons throughout the visual system, including both the dorsal and ventral streams of extrastriate visual cortex, show a reduction in visual responses or sensitivity around the time of saccades. However, the source of this suppression remains unknown. We review evidence that oculomotor regions such as the superior colliculus and frontal eye field may play a role, as well as anatomical data that place constraints on possible mechanisms of suppression.
灵长类动物每秒会进行几次眼球跳动，然而这些运动所产生的视网膜运动却未被察觉。扫视抑制是在眼球运动前后发生的一种深度视觉敏感度丧失，人们认为它通过减弱对自身产生运动的感知来促进视觉稳定性。神经生理学研究已经提供证据表明，整个视觉系统中的神经元，包括纹外视觉皮层的背侧和腹侧通路，在扫视前后视觉反应或敏感度都会降低。然而，这种抑制的来源仍然未知。我们回顾了证据表明诸如上丘和额叶眼区等动眼神经区域可能发挥作用，以及对抑制可能机制形成限制的解剖学数据。
