Xie Xin-Yu, Burr David C, Morrone Maria Concetta
School of Psychology and Cognitive Science, East China Normal University, Shanghai, China.
Department of Neuroscience, Psychology, Pharmacology, and Child Health, University of Florence, Florence, Italy.
Commun Psychol. 2025 Mar 17;3(1):41. doi: 10.1038/s44271-025-00224-7.
Perception of a continuous world relies on our ability to integrate discontinuous sensory signals when we make saccadic eye movements, which abruptly change the retinal image. Here we investigate the role of oscillations in integrating pre-saccadic information with the current sensory signals. We presented to participants (N = 24) a brief pre-saccadic Gabor stimulus (termed the inducer) before voluntary 16° saccades, followed by a test Gabor stimulus at various times before or after saccadic onset. Orientation judgments of the test stimulus were biased towards the orientation of both the inducer and previous (1-back) test stimulus, consistent with serial dependence. In addition to the average bias, judgments oscillated in synchrony with saccadic onset at alpha frequencies (~9.5 Hz) towards the orientation of the inducer or 1-back stimulus. There was also a strong bias towards the mean orientation (central tendency): however, that bias was constant over time, not associated with saccade-synched oscillations. Perceptual oscillations in serial dependence (but not central tendency) suggest that alpha rhythms may be instrumental in communicating short-term (but not long-term) perceptual memory across saccades, helping to preserve stability during saccades. The distinction between the modes of communicating short- and long-term memory suggests that the two phenomena are mediated by distinct neuronal circuitry.
对连续世界的感知依赖于我们在进行快速眼动时整合不连续感官信号的能力，快速眼动会突然改变视网膜图像。在这里，我们研究振荡在将扫视前信息与当前感官信号整合中的作用。我们在参与者（N = 24）进行自愿的16°扫视之前，向他们呈现一个短暂的扫视前Gabor刺激（称为诱导刺激），然后在扫视开始前或后的不同时间呈现一个测试Gabor刺激。测试刺激的方向判断偏向于诱导刺激和先前（1-back）测试刺激的方向，这与序列依赖性一致。除了平均偏差外，判断还与扫视开始时的α频率（约9.5Hz）同步振荡，朝向诱导刺激或1-back刺激的方向。对平均方向（中心趋势）也有强烈的偏向：然而，这种偏向随时间保持不变，与扫视同步振荡无关。序列依赖性中的感知振荡（但不是中心趋势）表明，α节律可能有助于在扫视过程中传递短期（但不是长期）感知记忆，有助于在扫视期间保持稳定性。短期和长期记忆传递模式之间的区别表明，这两种现象由不同的神经回路介导。
