Beta and Gamma Rhythms in Human Auditory Cortex during Musical Beat Processing
Beta and Gamma Rhythms in Human Auditory Cortex during Musical Beat Processing
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DOI：
10.1111/j.1749-6632.2009.04779.x
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发表时间：
2009-01-01
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影响因子：
--
通讯作者：
Ross, Bernhard
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文献类型：
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作者：
Fujioka, Takako;Trainor, Laurel J.;Ross, Bernhard
我们通过脑磁图（MEG）检测了被动聆听偶尔遗漏单音的常规音乐节拍时听觉皮层的β -（类似于20 Hz）和γ -（类似于40 Hz）波段活动。每次音调后β活性下降，随后又增加，从而形成与刺激同步的周期性调制。省略后没有β的减少。相比之下，γ波段活动在音调和省略后出现峰值，表明潜在的内源性预期过程。我们认为听觉β和伽马振荡在音乐节拍编码和听觉-运动相互作用中具有不同的作用。
We examined beta- (similar to 20 Hz) and gamma- (similar to 40 Hz) band activity in auditory cortices by means of magnetoencephalography (MEG) during passive listening to a regular musical beat with occasional omission of single tones. The beta activity decreased after each tone, followed by an increase, thus forming a periodic modulation synchronized with the stimulus. The beta decrease was absent after omissions. In contrast, gamma-band activity showed a peak after tone and omission, suggesting underlying endogenous anticipatory processes. We propose that auditory beta and gamma oscillations have different roles in musical beat encoding and auditory-motor interaction.