Evaluation of phase-locked and non-phase-locked MEG activities under emotional stimuli
Evaluation of phase-locked and non-phase-locked MEG activities under emotional stimuli
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DOI：
10.1109/wac.2014.6935990
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发表时间：
2014-10
期刊：
影响因子：
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通讯作者：
Takuto Hayashi;Y. Mizuno-Matsumoto;Shimpei Kohri;Yoshinori Nitta;M. Tonoike
中科院分区：
文献类型：
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作者：
Takuto Hayashi;Y. Mizuno-Matsumoto;Shimpei Kohri;Yoshinori Nitta;M. Tonoike
本研究调查了相位锁定和非相位锁定的大脑反应在θ和α频段。在情绪性视听刺激下连续记录122通道全脑脑磁图（MEG）。结果表明，情绪刺激诱导增加θ波段锁相活动在200-400毫秒和非锁相活动在100-600毫秒。这些活动与愉快的刺激在所有领域相比，基线期更强。此外，在600-1000 ms的愉快刺激和800-1000 ms左右的不愉快刺激中，枕骨簇的α 1带非锁相活动减少。这些结果表明，情绪处理会在刺激开始后不久引起θ频段的大脑活动增加。
The present study investigates phase-locked and non-phase-locked brain responses in theta and alpha frequency bands. A 122-ch whole-head magnetoencephalogram (MEG) was recorded continuously during emotional audio-visual stimuli. The results showed that emotional stimuli induced increased theta band phase-locked activity at 200-400 ms and non-phase-locked activity at 100-600 ms. These activities were stronger with pleasant stimuli over all areas compared with the baseline period. In addition, decreased alpha1 band non-phase-locked activity was shown at 600-1000 ms in the pleasant and around 800-1000 ms in the unpleasant stimuli over the occipital cluster. These results indicate that emotional processing induces increased brain activity in the theta frequency band soon after the onset of the stimuli.