We used a differential Pavlovian conditioning paradigm to measure tilt aftereffect (TAE) strength. Gabor patches, rotated clockwise and anticlockwise, were used as conditioned stimuli (CSs), one of which (CS+) was followed by the unconditioned stimulus (UCS), whereas the other (CS-) appeared alone. The UCS was an air puff delivered to the left eye. In addition to the CS+ and CS-, the vertical test patch was also presented for the clockwise and anticlockwise adapters. The vertical patch was not followed by the UCS. After participants acquired differential conditioning, eyeblink conditioned responses (CRs) were observed for the vertical patch when it appeared to be tilted in the same direction as the CS+ owing to the TAE. The effect was observed not only when the adapter and test stimuli were presented in the same retinotopic position but also when they were presented in the same spatiotopic position, although spatiotopic TAE was weak-it occurred approximately half as often as the full effect. Furthermore, spatiotopic TAE decayed as the time after saccades increased, but did not decay as the time before saccades increased. These results suggest that the time before the performance of saccadic eye movements is needed to compute the spatiotopic representation.

译文

我们使用微分巴甫洛夫条件范式来测量倾斜后效 (TAE) 强度。顺时针和逆时针旋转的Gabor斑块被用作条件刺激 (CSs),其中一个 (CS) 之后是非条件刺激 (UCS),而另一个 (CS-) 单独出现。UCS是向左眼吹气。除了CS和CS-之外,还为顺时针和逆时针适配器提供了垂直测试补丁。UCS没有跟随垂直补丁。参与者获得差异调节后,由于TAE,垂直贴片似乎沿与CS相同的方向倾斜时,观察到眨眼条件反应 (CRs)。不仅当适配器和测试刺激出现在相同的视网膜位置时,而且当它们出现在相同的空间位置时,观察到这种效果,尽管空间位置TAE很弱-发生的频率大约是全部效果的一半。此外,空间空间TAE随着扫视后时间的增加而衰减,但不会随着扫视前时间的增加而衰减。这些结果表明,需要进行眼球运动之前的时间来计算空间位表示。

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