The Neural Mechanism for Gender Difference in Meditation Processing: Evidence from ERP
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摘要: 采用事件相关电位(ERP)技术,记录52名大学生被试在听(正性和负性)冥想指导语的脑电波, 探索冥想加工过程的神经机制与性别差异. 以固定频率的声音作为线索诱发N2和P3成分,这2个成分作为探究刺激差异和注意力资源调配的标记分别在160 ms和240 ms的时间上观察到. 结果表明:在正性冥想条件下,在前额叶皮层(PFC)中观察到的N160波幅更大,而在负性冥想条件下,P240波幅减小;在负性冥想条件下,表现出明显的性别的差异,主要是情绪偏侧化加工更加明显,男性在N160左额叶波幅显著大于右额叶,女性在P240右额叶波幅显著大于左额叶. 结果为冥想的作用存在性别差异进一步提供神经生理方面的证据.Abstract: The neurophysiological effects induced by emotional background during meditation and the associated gender differences were investigated. Event-related potentials (ERPs) were recorded in 52 young adults listening to positive and negative meditative guidance programs. A fixed-frequency D-like sound was used as a cue to evoke ERPs. The main ERP components induced by a fixed-frequency sound were N2 and P3 components, observed temporally at N160 and P240, respectively. These two components serve as the markers for exploring stimulus differences and attention resource allocation, respectively. More negative N160 amplitude and reduced P240 amplitude were observed in the prefrontal cortex (PFC) under the positive meditation (PM) condition than under the negative meditation (NM) condition. Significant gender differences in ERP responses were also found, preferentially in the NM condition, with a more pronounced difference of frontal lateralization between the NM and PM conditions. The N160 amplitude of the left frontal lobe in men is significantly greater than that of the right frontal lobe; the P240 amplitude of the right frontal lobe in women is significantly larger than that of the left frontal lobe. These findings proved that positive guidance and negative guidance can affect the emotional regulation effects of meditation differently and there is also a gender difference in the neurophysiological effects of meditation.
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Keywords:
- meditation /
- gender difference /
- N2 /
- P3 /
- event-related potentials
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表 1 情绪语句主观评定结果
Table 1 The results of online questionnaire on emotional arousal self-assessment
负性语词 唤醒度 负性语词 唤醒度 正性语词 唤醒度 正性语词 唤醒度 孤独 3.96 悲伤 3.21 幸福 5.55 真诚 5.88 焦虑 3.96 苦闷 3.32 爱 5.36 自由 5.30 烦躁 3.84 遗弃 2.62 成功 4.21 如意 5.21 默默承受 4.54 失落 3.29 自信 4.86 拥有 5.20 倒霉 3.61 绝望 2.63 尊重 5.48 相信 5.45 软弱可欺 3.08 付出 4.19 独一无二 4.67 鼓励 5.36 伤心 3.51 无助 3.23 快乐 5.49 正义 5.73 抑郁 3.13 寂寞 3.45 希望 5.65 支持 5.49 愤怒 3.16 失败 3.16 丰盛 5.17 理解 5.59 颓废 3.75 冷漠 2.84 光明 5.37 优秀 5.10 表 2 52名被试实验后主观报告的情绪语句、出现频次及平均唤醒度评定结果
Table 2 The emotional statements reported by 52 subjects and their frequency and arousal degree
情绪词 频次 唤醒度 情绪词 频次 唤醒度 情绪词 频次 唤醒度 情绪词 频次 唤醒度 孤独 20 3.91 悲伤 1 2.85 幸福 2 5.24 真诚 1 5.62 焦虑 3 3.88 苦闷 1 2.97 爱 6 5.5 自由 2 5.29 烦躁 4 3.82 遗弃 1 1.94 成功 3 4.35 如意 2 5.21 默默承受 2 4.12 失落 1 2.94 自信 2 4.38 拥有 2 5.41 倒霉 2 2.82 付出 1 4.35 尊重 1 5.18 相信 3 5.35 软弱可欺 2 3.09 无助 1 3.35 独一无二 2 4.94 鼓励 2 5.68 伤心 3 3.44 寂寞 1 3.06 开心快乐 5 4.76 正义 1 5.41 抑郁 2 2.59 希望 3 5.06 支持 2 5.85 愤怒 1 2.29 丰盛 1 5.06 理解 1 5.68 颓废 1 2.59 光明 1 5.24 优秀 1 5.00 注:ERP实验后52名被试共报告50个消极情绪语句,49个积极情绪语句,剔除本文非网络问卷设定的情绪关键词,剩下47个消极语句和43个积极语句,按照被试所报告的语句中消极和积极词汇出现的频次整理得出17个消极词汇和20个积极词汇. 表 3 前半脑各成分的分布位置、平均潜伏期及平均波幅(x±SE)
Table 3 The location, mean latency and mean amplitude of frontal cerebral hemisphere components (Mean±SE)
成分 位置 负性冥想 正性冥想 男性 女性 男性 女性 潜伏期/ms 波幅/μV 潜伏期/ms 波幅/μV 潜伏期/ms 波幅/μV 潜伏期/ms 波幅/μV N160 F3 161.78±21.76 -1.14±0.92 155.29±24.57 -0.24±1.36 153.50±22.93 -0.83±1.18 147.72±20.91 -1.30±1.39 F4 159.06±22.56 -1.00±0.78 154.67±26.75 0.17±1.42 151.23±22.26 -0.71±1.07 149.22±22.37 -1.09±1.26 F8 161.89±27.68 -0.67±1.29 155.79±27.15 0.15±1.84 158.27±29.67 -0.56±1.09 157.11±26.98 -1.11±1.48 Fz 158.44±22.20 -1.11±0.67 157.29±24.75 0.19±1.45 150.59±23.26 -0.78±1.21 144.89±21.30 -1.59±2.03 FC1 159.11±22.35 -0.87±0.83 154.38±24.64 -0.08±1.43 157.59±23.92 -0.97±1.19 145.61±21.14 -1.42±1.09 FC2 158.00±23.35 -1.00±0.90 156.67±24.54 -0.02±1.30 154.14±23.33 -0.83±1.16 149.61±21.71 -1.37±1.07 FC5 164.39±22.19 -0.99±0.94 156.96±28.32 -0.20±1.23 161.09±22.81 -0.60±1.37 147.56±22.17 -0.98±1.26 FC6 161.83±25.58 -0.79±0.87 153.42±26.97 0.33±1.38 158.09±25.66 -0.67±1.10 157.94±26.05 -1.08±1.19 FCz 158.44±23.15 -0.97±0.79 154.13±24.00 0.00±1.22 156.45±22.57 -0.89±1.19 145.44±21.13 -1.36±1.02 P240 F3 254.78±31.22 1.02±1.08 246.08±27.05 2.06±1.54 238.14±20.29 1.19±1.37 247.22±17.12 1.41±1.39 F4 249.56±27.23 1.16±1.20 247.00±27.58 2.52±1.31 242.64±29.36 1.24±1.17 247.06±17.11 1.54±0.98 F8 252.00±32.76 1.01±1.72 245.25±30.62 2.10±1.75 238.86±31.90 0.84±1.23 253.61±23.57 0.87±1.14 Fz 248.72±26.79 1.29±0.86 246.08±27.11 2.40±1.31 236.36±22.08 1.41±1.22 251.17±19.64 1.39±1.54 FC2 248.72±28.75 1.10±0.84 241.92±26.39 2.32±1.34 234.41±20.73 1.07±1.29 248.33±15.47 1.47±1.23 FC6 253.33±30.28 0.87±1.32 252.04±31.34 2.20±1.40 246.05±28.31 0.86±1.12 252.50±21.11 1.06±1.38 FCz 249.72±29.15 1.39±1.01 242.08±25.78 2.31±1.21 240.32±24.20 1.16±1.39 249.17±15.77 1.59±1.19 -
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