Saccades and drifts differentially modulate neuronal activity in V1: Effects of retinal image motion, position, and extraretinal influences
Saccades and drifts differentially modulate neuronal activity in V1: Effects of retinal image motion, position, and extraretinal influences
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DOI：
10.1167/8.14.19
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发表时间：
2008-01-01
影响因子：
1.8
通讯作者：
Snodderly, D. Max
中科院分区：
文献类型：
--
作者：
Kagan, Igor;Gur, Moshe;Snodderly, D. Max
在自然视觉中，连续变化的输入由快速扫视眼球运动和缓慢漂移产生。我们分析了固定扫视，随意扫视，漂移的猕猴V1神经元的活动的影响。注视性眼跳和随意性眼跳的效果相当。在接近最佳刺激的情况下，分离的神经元群体。扫视后的红色瞬时爆发、漂移期间的持续放电或两者。强度，时间过程和选择性激活的快速和缓慢的眼球运动强烈相关的反应。灰或外部移动的刺激。这些神经元特性支持后扫视爆发和漂移响应的互补功能。局部扫视后爆发信号快速运动或突然变化的潜在显着刺激的感受野内，广泛的同步爆发信号发生扫视。反对有效漂移期间的环传达了关于有助于感知的小空间特征的位置和对比度的更具体的信息。一个细节。除了刺激驱动的反应，双相视网膜外调制伴随扫视被确定在三分之一的细胞。短暂的眼周抑制之后是更强和更持久的增强，可以使感知偏向于眼跳目标。这些不同的神经元激活模式是我们视觉世界动态编码的基础。
In natural vision, continuously changing input is generated by fast saccadic eye movements and slow drifts. We analyzed effects of fixational saccades, voluntary saccades, and drifts on the activity of macaque V1 neurons. Effects of fixational saccades and small voluntary saccades were equivalent. In the presence of a near-optimal stimulus, separate populations of neurons. red transient bursts after saccades, sustained discharges during drifts, or both. Strength, time course, and selectivity of activation by fast and slow eye movements were strongly correlated with responses to. ashed or to externally moved stimuli. These neuronal properties support complementary functions for post-saccadic bursts and drift responses. Local post-saccadic bursts signal rapid motion or abrupt change of potentially salient stimuli within the receptive field; widespread synchronized bursts signal occurrence of a saccade. Sustained. ring during drifts conveys more specific information about location and contrast of small spatial features that contribute to perception of. ne detail. In addition to stimulus-driven responses, biphasic extraretinal modulation accompanying saccades was identified in one third of the cells. Brief perisaccadic suppression was followed by stronger and longer-lasting enhancement that could bias perception in favor of saccade targets. These diverse patterns of neuronal activation underlie the dynamic encoding of our visual world.