Long-term meditators self-induce high-amplitude gamma synchrony during mental practice
Long-term meditators self-induce high-amplitude gamma synchrony during mental practice
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DOI：
10.1073/pnas.0407401101
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发表时间：
2004-11-16
影响因子：
11.1
通讯作者：
Davidson, RJ
中科院分区：
文献类型：
--
作者：
Lutz, A;Greischar, LL;Davidson, RJ
修行者将“冥想”，即心智训练，理解为一个熟悉自身精神生活的过程，它会导致认知和情感方面的长期变化。人们对这一过程及其对大脑的影响知之甚少。在此我们发现，长期修行的佛教徒在冥想期间会自我诱发持续的脑电图高振幅伽马波段振荡以及相位同步。这些脑电图模式与对照组不同，特别是在外侧额顶电极处。此外，在冥想前的静息基线状态下，修行者内侧额顶电极处的伽马波段活动（25 - 42赫兹）与慢振荡活动（4 - 13赫兹）的比率最初高于对照组。在冥想期间，这种差异在大多数头皮电极处急剧增大，并且在冥想后的基线状态下仍高于初始基线。这些数据表明，心智训练涉及时间整合机制，并可能诱发短期和长期的神经变化。
Practitioners understand "meditation," or mental training, to be a process of familiarization with one's own mental life leading to long-lasting changes in cognition and emotion. Little is known about this process and its impact on the brain. Here we find that long-term Buddhist practitioners self-induce sustained electroencephalographic high-amplitude gamma-band oscillations and phase-synchrony during meditation. These electroencephalogram patterns differ from those of controls, in particular over lateral frontoparietal electrodes. In addition, the ratio of gamma-band activity (25-42 Hz) to slow oscillatory activity (4-13 Hz) is initially higher in the resting baseline before meditation for the practitioners than the controls over medial frontoparietal electrodes. This difference increases sharply during meditation over most of the scalp electrodes and remains higher than the initial baseline in the postmeditation baseline. These data suggest that mental training involves temporal integrative mechanisms and may induce short-term and long-term neural changes.