Coding of Microsaccades in Three-Dimensional Space by Premotor Saccadic Neurons
Coding of Microsaccades in Three-Dimensional Space by Premotor Saccadic Neurons
复制标题
运动前扫视神经元对三维空间中的微扫视进行编码
作者：
Marion R. Van Horn;K. Cullen
微跳视是注视过程中产生的微小的、不自主的眼球运动。虽然准确的视觉感知需要在注视过程中精确的双眼协调，但之前对微跳视神经控制的研究仅测量了一只眼睛的运动。在这里，我们展示了运动前扫视神经元如何在三维空间中控制这些小的注视眼球运动。受过训练以注视不同深度的目标的猴子所产生的微扫视眼运动在近视和远视期间在三维空间中的分布相似。前运动神经元神经活动的单个单元记录进一步表明，脑干扫视电路通过优先编码单个眼睛的动态运动（即共轭和聚散运动的集成控制）来控制这些微小的注视解共轭移动。这些发现挑战了微扫视是严格共轭的传统观念，并且对于使用微扫视评估视觉和注意力处理以及某些神经系统疾病的研究具有重要意义。
Microsaccades are small, involuntary eye movements that are produced during fixation. While accurate visual perception requires precise binocular coordination during fixation, previous studies of the neural control of microsaccades measured the movement of one eye only. Here we show how premotor saccadic neurons control these small fixational eye movements in three-dimensional space. Microsaccadic eye movements, produced by monkeys trained to fixate targets presented at different depths, were similarly distributed in three-dimensional space during both near and far viewing. Single unit recordings of the neural activity of premotor neurons further revealed that the brainstem saccadic circuitry controls these minute disconjugate shifts of gaze by preferentially encoding the dynamic movement of an individual eye (i.e., integrated control of conjugate and vergence motion). These findings challenge the traditional notion that microsaccades are strictly conjugate and have important implications for studies that use microsaccades to evaluate visual and attentional processing, as well as certain neurological disorders.
影响因子：
2.5
作者：
VANGISBERGEN, JAM;ROBINSON, DA;GIELEN, S
通讯作者：
GIELEN, S
眼跳期间与眼跳相关的上丘神经元放电并伴有辐辏。
DOI：
10.1152/jn.00877.2002
发表时间：
2003
期刊：
Journal of neurophysiology.
影响因子：
--
作者：
Walton,MarkMG;Mays,LawrenceE
通讯作者：
Mays,LawrenceE