Gamma神经振荡和信息整合加工

Gamma神经振荡是一种基础神经活动。它的特性使其与“信息整合加工”产生了潜在联系。已有研究显示, 自下而上的跨通道信息整合与感觉皮层的Gamma振荡同步化有关; 单通道自上而下的信息整合与高级皮层的Gamma振荡增强有关。现有的“神经耦合理论”和“匹配利用模型”分别描述了Gamma振荡如何在“自下而上”及“自上而下”的信息整合中发挥作用。Gamma振荡虽与整合加工密切相关, 但作为指标需谨慎。对于Gamma振荡在复杂情景整合加工中的作用仍待探究。

Gamma oscillations and information binding process

The Gamma oscillation is one kind of neural interaction activities. The characteristics of the Gamma oscillation contribute to its important role in information binding process. A large body of research has demonstrated that binding the sensory signal from multiple channels at the perceptual level is associated with the gamma oscillatory synchronization in sensory cortex (e.g. visual cortex, auditory cortex), whereas binding the information from single channel at the conscious level is associated with the enhanced Gamma oscillations in higher cortex (e.g. temporo-parietal cortex). The functions of Gamma oscillations in information-binding process have been described in several theoretical frameworks, including Neural Coupling model and Match & Utilization model. However, extreme caution should be exercised when Gamma oscillations were applied as an index of binding process. What roles of Gamma oscillations play in a complex binding process should be investigated in the future.