Pasquini Henrique Adam, Tanaka Guaraci Ken, Basile Luis Fernando Hindi, Velasques Bruna, Lozano Mirna Delposo, Ribeiro Pedro
Laboratory of Psychophysiology, Faculdade da Saúde, UMESP, São Bernardo do Campo, SP, Brazil.
Brain Mapping and Sensory Motor Integration, Institute of Psychiatry of Federal University of Rio de Janeiro (IPUB/UFRJ), Rio de Janeiro, RJ, Brazil.
Biomed Res Int. 2015;2015:598496. doi: 10.1155/2015/598496. Epub 2015 Jan 6.
This study aimed to verify the electrophysiological correlates of the changes in long-term regular meditators. We use modern techniques of high-resolution electroencephalography applied to slow potentials, power spectra, and potencies related to the events. To obtain encephalographic records, we use an assembly of 128 channels in 31 subjects (17 Soto Zen Buddhist meditators). The motivation of this study was to determine whether the induced beta power would present an increase in meditators as well as a decrease in induced theta/beta ratio in absolute and relative values. However, opposite to what we expected, no significant change was found in the beta frequency. In contrast, the main findings of the study were correlations between the frequency of weekly meditation practice and the increased theta induced relative power, increase of induced power ratio (ratio theta/beta), and increase of the ratio of induced relative powers (theta/beta ratio) during our task that featured an "adapted meditation," suggesting that the meditative state of "mindfulness" is much more related to the permittivity of "distractions" by the meditators, with a deliberate reduction of attention.
本研究旨在验证长期规律冥想者大脑变化的电生理相关性。我们运用了现代高分辨率脑电图技术来研究慢电位、功率谱以及与事件相关的电位。为获取脑电图记录，我们对31名受试者（17名曹洞宗佛教冥想者）使用了128通道装置。本研究的目的是确定诱导β波功率在冥想者中是否会增加，以及诱导θ/β比值在绝对值和相对值上是否会降低。然而，与我们预期相反，β频率未发现显著变化。相反，该研究的主要发现是，在以“适应性冥想”为特色的任务中，每周冥想练习的频率与诱导θ相对功率增加、诱导功率比值（θ/β比值）增加以及诱导相对功率比值（θ/β比值）增加之间存在相关性，这表明“正念”的冥想状态与冥想者对“分心”的耐受能力更为相关，且注意力会有意降低。
