Moeller Gudrun U, Kayser Christoph, König Peter
Institute of Neuroinformatics, University/ETH Zurich, Zurich, Switzerland.
Neuroreport. 2007 Mar 26;18(5):401-4. doi: 10.1097/WNR.0b013e3280125686.
Although saccadic eye movements can radically change the retinal image, perceptually their impact is surprisingly small. Here, we investigate possible neuronal correlates of saccadic suppression in cats freely viewing natural stimuli. By comparing changes attributable to saccadic events with passive stimulus changes, we find that during saccades: (i) evoked and induced activity is reduced in areas 18 and 21a by equal amounts, (ii) the variability of neuronal activity with stimulus category is abolished in both areas, and (iii) the high-power transient induced by stimulus change is not observed. These results present electrophysiological evidence for saccadic suppression at the level of primary and higher visual cortex under natural conditions.
尽管眼球的快速跳动会彻底改变视网膜图像，但在感知上其影响却出奇地小。在此，我们研究了自由观看自然刺激的猫中扫视抑制可能的神经元相关性。通过将扫视事件引起的变化与被动刺激变化进行比较，我们发现在扫视期间：（i）18区和21a区的诱发活动和诱导活动等量减少，（ii）两个区域中神经元活动随刺激类别变化的变异性均消失，以及（iii）未观察到由刺激变化诱发的高功率瞬变。这些结果为自然条件下初级和高级视觉皮层水平的扫视抑制提供了电生理证据。
