Shevelev I A, Kamenkovich V M, Kostelianetz N B, Sharaev G A
Department of Sensory Physiology, Institute of Higher Nervous Activity and Neurophysiology, Russian Academy of Sciences, Moscow.
FEBS Lett. 1996 Aug 26;392(2):169-74. doi: 10.1016/0014-5793(96)00693-x.
The perception of visual motion in seven subjects was studied comparing motion towards or away from the fixation point in the left or right hemifield. The light target was moved either at a constant velocity or positively or negatively accelerated to compensate for the magnification factor of the visual cortex. We compared probability and latency of motion recognition when it was asynchronous or synchronized to different phases of the alpha wave of the EEG recorded over the occipital cortex. If the motion accelerated away from the fixation point and was synchronized with the alpha wave it was more likely to be perceived whereas if it was towards the fixation point it was less likely to be detected. However, perception of the constant velocity motion was not changed by locking it to the alpha wave phase. These results support the hypothesis that the scanning waves of excitation spread over the visual cortex periodically and that they are locked to the alpha component of the EEG.
对七名受试者的视觉运动感知进行了研究，比较了在左或右半视野中朝向或远离注视点的运动。轻目标以恒定速度移动，或正向或负向加速，以补偿视觉皮层的放大因子。我们比较了运动识别的概率和潜伏期，当它与枕叶皮层记录的脑电图α波的不同相位异步或同步时。如果运动加速远离注视点并与α波同步，则更有可能被感知，而如果它朝向注视点，则被检测到的可能性较小。然而，将恒定速度运动锁定到α波相位并不会改变其感知。这些结果支持了这样的假设，即兴奋的扫描波周期性地扩散到视觉皮层，并且它们与脑电图的α成分锁定。
