Do gamma oscillations play a role in cerebral cortex?
Do gamma oscillations play a role in cerebral cortex?
复制标题
DOI：
10.1016/j.tics.2014.12.002
复制
发表时间：
2015-02
影响因子：
19.9
通讯作者：
Maunsell JH
中科院分区：
文献类型：
--
作者：
Ray S;Maunsell JH
伽马节律（中心频率在30 - 80赫兹之间）受到诸如注意力和记忆等认知机制的调节，并且据推测通过支持皮层区域之间的通信通道或在其相位中编码信息，在介导这些过程中发挥作用。在此，我们强调几个与伽马节律有关的问题，例如功率低且不稳定、它对低水平刺激特征的依赖性、由于传导延迟导致的问题以及由于与尖峰相关的活动造成的干扰，这使得伽马相位的准确估计变得困难。伽马节律可能是大脑中兴奋 - 抑制相互作用的一个潜在有用的标志，但它是否也为信息处理或编码提供了一种机制仍然是一个未解决的问题。
Gamma rhythm (which has a centre frequency between 30-80 Hz) is modulated by cognitive mechanisms such as attention and memory, and has been hypothesized to play a role in mediating these processes by supporting communication channels between cortical areas or encoding information in its phase. We here highlight several issues related to gamma rhythms, such as low and inconsistent power, its dependence on low-level stimulus features, problems due to conduction delays and contamination due to spike-related activity that makes accurate estimation of gamma phase difficult. Gamma rhythm could be a potentially useful signature of excitation-inhibition interactions in the brain, but whether it also provides a mechanism for information processing or coding remains an open question.