SEX-DIFFERENCES IN PATTERNS OF EEG ASYMMETRY
SEX-DIFFERENCES IN PATTERNS OF EEG ASYMMETRY
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DOI：
10.1016/0301-0511(76)90012-0
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发表时间：
1976-01-01
影响因子：
2.6
通讯作者：
BROMFIELD, E
中科院分区：
文献类型：
--
作者：
DAVIDSON, RJ;SCHWARTZ, GE;BROMFIELD, E
研究(3)报道了在自我产生的认知和情感任务中脑电不对称性的性别差异。在第一个实验中，双侧脑电对α进行了量化。在网上，记录的是惯用右手的受试者，他们要么吹口哨，要么唱歌，要么背诵熟悉的歌曲的歌词。结果显示，只有在没有左撇子家族史的受试者中，吹口哨和说话的条件有显著的不对称性，而且在这一组中，只有女性没有男性。在第二个实验中，记录了右利手(没有左撇子家族史)自我诱发隐性情感状态和非情感状态时的双侧脑电。结果显示，在情绪试验中，只有在女性中，相对右脑的激活显著高于非情绪试验；在条件之间的不对称性方面，男性没有表现出显著的任务依赖性变化。第三个实验旨在检验这一假设，即在对称和非对称脑电模式的生物反馈训练中，女性比男性表现出更大的时间不对称性百分比。结果证实了这一预测，并表明女性对这种不对称的皮质图案表现出更好的控制能力。这些发现为女性在自我生成任务中具有更大的双边灵活性的假说提供了新的神经心理学支持。
Studies (3) showing sex differences in EEG asymmetry during self-generated cognitive and affective tasks are reported. In the 1st experiment, bilateral EEG quantified for .alpha. on-line, was recorded from right-handed subjects while they either whistled, sang or recited lyrics of familiar songs. The results revealed significant asymmetry between the whistle and talk conditions only for subjects with no familial left-handedness and, within this group, only for females and not for males. In the 2nd experiment, bilateral EEG was recorded while right-handed subjects (with no familial left-handedness) self-induced covert affective and non-affective states. Results revealed significantly greater relative right-hemisphere activation during emotion vs. non-emotion trials only in females; males showed no significant task-dependent shifts in asymmetry between conditions. The 3rd experiment was designed to test the hypothesis that females show greater percent time asymmetry than males during biofeedback training for symmetrical and asymmetrical EEG patterns. Results confirmed this prediction and indicated that females show better control of such asymmetrical cortical patterning. These findings provide new neuropsychological support for the hypothesis of greater bilateral flexibility in females during self-generation tasks.