Signals of eye-muscle proprioception modulate perceived motion smear.
Signals of eye-muscle proprioception modulate perceived motion smear.
复制标题
眼肌本体感觉信号调节感知运动涂抹。
DOI：
10.1167/8.14.7
复制
发表时间：
2008
影响因子：
1.8
通讯作者：
Bedell,HaroldE
中科院分区：
文献类型：
--
作者：
Tong,Jianliang;Stevenson,ScottB;Bedell,HaroldE
在眼球运动过程中获得清晰的感知是人类视觉系统每天必须面对的主要挑战之一。像大多数对光敏感的机制一样，人类视觉系统有一个有限的积分时间，这可能会导致运动图像看起来像是模糊的。通过比较正在进行的眼球运动和注视过程中感知到的运动涂抹，以前的研究表明，通过使用关于眼动的“视网膜外信息”的神经补偿机制来减少涂抹。然而，目前尚不清楚是眼肌肉本体感觉(传入输入)、传出动眼运动指令的内部副本(传出副本)，还是两者都有助于减少污点。目前的研究发现，在被动眼动(这只由眼睛肌肉本体感觉发出信号)和主动追踪(传出复制信号也存在)过程中，感知运动涂抹的减少类似地发生。这些结果揭示了一种维持视觉清晰度和立场的新的神经贡献，而不是以前的报道，即眼睛肌肉本体感觉对视觉知觉只有很小的贡献。
Achieving clear perception during eye movements is one of the major challenges that the human visual system has to face every day. Like most light sensitive mechanisms, the human visual system has a finite integration time that may cause moving images to appear smeared. By comparing the perceived motion smear during ongoing eye movements and fixation, previous studies indicated that smear is reduced by a neural compensation mechanism that uses “extra-retinal information” about eye movements. However, it is not clear whether eye-muscle proprioception (afferent input), internal copies of efferent oculomotor commands (efference copy), or both contribute to the smear reduction. The present study found that similar reductions of perceived motion smear occur during passive eye movement (which is signaled only by eye-muscle proprioception) and during active pursuit tracking (for which efference copy signals exist as well). These results reveal a novel neural contribution for maintaining visual clarity and stand in contrast to previous reports that eye-muscle proprioception makes only a minor contribution to visual perception.