Gamma rhythms and beta rhythms have different synchronization properties
Gamma rhythms and beta rhythms have different synchronization properties
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DOI：
10.1073/pnas.97.4.1867
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发表时间：
2000-02-15
影响因子：
11.1
通讯作者：
Traub, RD
中科院分区：
文献类型：
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作者：
Kopell, N;Ermentrout, GB;Traub, RD
实验和建模工作表明，海马 CA1 区域中处于 beta 范围 (12-29 Hz) 的节律与 gamma (30-70 Hz) 具有不同的动态结构。我们使用简化模型来表明，不同节律采用不同的动态机制来同步，基于不同的离子电流，beta 频率能够在较长的传导延迟（对应于在大脑中传播很长距离的信号）上进行同步，而这显然是 gamma 无法容忍的节奏。同步属性与数据一致，表明伽马节律用于相对局部的计算，而β节律用于涉及更远的结构的更高级别的相互作用。
Experimental and modeling efforts suggest that rhythms in the CA1 region of the hippocampus that are in the beta range (12-29 Hz) have a different dynamical structure than that of gamma (30-70 Hz), We use a simplified model to show that the different rhythms employ different dynamical mechanisms to synchronize, based on different ionic currents, The beta frequency is able to synchronize over long conduction delays (corresponding to signals traveling a significant distance in the brain) that apparently cannot be tolerated by gamma rhythms. The synchronization properties are consistent with data suggesting that gamma rhythms are used for relatively local computations whereas beta rhythms are used for higher level interactions involving more distant structures.