Increased corticospinal excitability induced by unpleasant visual stimuli
Increased corticospinal excitability induced by unpleasant visual stimuli
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DOI：
10.1016/j.neulet.2010.03.027
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发表时间：
2010-09-13
影响因子：
2.5
通讯作者：
Riek, Stephan
中科院分区：
文献类型：
--
作者：
Coelho, Carlos M.;Lipp, Ottmar V.;Riek, Stephan
愉快和不愉快的情绪刺激经常被概念化为行动的动机。使用局灶性经颅磁刺激（TMS）检查了这一概念。十名健康的参与者观看了来自国际情感图片系统（IAPS）的令人愉快、中性和不愉快的图片。在观看图片期间，将局部 TMS 应用于支配左手第一背侧骨间肌的区域的右侧运动皮层。观看负面图片时的皮质运动兴奋性比观看中性或正面图像时更大，这可以通过更大的运动诱发电位来证明。愉快的图片和中性的图片之间没有发现差异。这些结果与情绪模型一致，在该模型中，负面情绪背后的神经网络与介导运动反应的大脑结构有选择性的直接连接。 (C) 2010 年，爱思唯尔爱尔兰有限公司出版。
Pleasant and unpleasant emotional stimuli are frequently conceptualized as motivators for action. This notion was examined using focal transcranial magnetic stimulation (TMS). Ten healthy participants viewed pleasant, neutral, and unpleasant pictures from the International Affective Picture System (IAPS). During picture viewing, focal TMS was applied to the right motor cortex over the area innervating the first dorsal interosseous muscle of the left hand. Corticomotor excitability was larger while viewing negative pictures than while viewing neutral or positive images, as evidenced by greater motor evoked potentials. No difference was found between pleasant and neutral pictures. These results are consistent with models of emotion in which the neural networks underlying negative emotions have selective, direct connections to brain structures that mediate motor responses. (C) 2010 Published by Elsevier Ireland Ltd.