Tanaka Guaraci Ken, Peressutti Caroline, Teixeira Silmar, Cagy Mauricio, Piedade Roberto, Nardi Antonio Egídio, Ribeiro Pedro, Velasques Bruna
Institute of Psychiatry, Federal University of Rio de Janeiro, Rio de Janeiro, RJ, Brasil.
Federal University of Rio de Janeiro, Rio de Janeiro, RJ, Brasil.
Arq Neuropsiquiatr. 2014 Sep;72(9):687-93. doi: 10.1590/0004-282x20140133.
Acute and long-term effects of mindfulness meditation on theta-band activity are not clear. The aim of this study was to investigate frontal theta differences between long- and short-term mindfulness practitioners before, during, and after mindfulness meditation. Twenty participants were recruited, of which 10 were experienced Buddhist meditators. Despite an acute increase in the theta activity during meditation in both the groups, the meditators showed lower trait frontal theta activity. Therefore, we suggested that this finding is a neural correlate of the expert practitioners' ability to limit the processing of unnecessary information (e.g., discursive thought) and increase the awareness of the essential content of the present experience. In conclusion, acute changes in the theta band throughout meditation did not appear to be a specific correlate of mindfulness but were rather related to the concentration properties of the meditation. Notwithstanding, lower frontal theta activity appeared to be a trait of mindfulness practices.
正念冥想对θ波活动的急性和长期影响尚不清楚。本研究的目的是调查长期和短期正念练习者在正念冥想前、冥想期间和冥想后的额叶θ波差异。招募了20名参与者，其中10名是有经验的佛教冥想者。尽管两组在冥想期间θ波活动均急性增加，但冥想者的特质额叶θ波活动较低。因此，我们认为这一发现是专家练习者限制处理不必要信息（如散漫思维）并提高对当前体验基本内容的意识能力的神经关联。总之，冥想过程中θ波带的急性变化似乎不是正念的特定关联，而是与冥想的专注特性有关。尽管如此，较低的额叶θ波活动似乎是正念练习的一个特质。
