Rhudy Jamie L, Williams Amy E, McCabe Klanci M, Nguyen Mary Anh Thù V, Rambo Philip
Department of Psychology, The University of Tulsa, Tulsa, Oklahoma 74104, USA.
Psychophysiology. 2005 Sep;42(5):579-87. doi: 10.1111/j.1469-8986.2005.00313.x.
This study was designed to examine the effect of emotion on the nociceptive flexion reflex and pain ratings. To do so, 28 participants viewed pictures varying in emotional valence (unpleasant, neutral, pleasant) and electric stimulations were delivered during and in between pictures. Biceps femoris EMG resulting from the stimulations was used to quantify the nociceptive flexion reflex (spinal nociception), and pain ratings to the stimulations were used as an evaluative measure of supraspinal nociception. Manipulation checks suggested that pictures effectively manipulated emotion. Moreover, nociceptive flexion reflex magnitudes and pain ratings were modulated in a parallel manner. Specifically, viewing unpleasant pictures enhanced the nociceptive flexion reflex and pain, whereas viewing pleasant pictures inhibited the reflex and pain. Analyses suggested that emotional valence, but not arousal, mediated the effects of pictures.
本研究旨在考察情绪对伤害性屈曲反射和疼痛评分的影响。为此，28名参与者观看了情绪效价不同（不愉快、中性、愉快）的图片，并在观看图片期间及图片之间施加电刺激。由刺激引起的股二头肌肌电图用于量化伤害性屈曲反射（脊髓伤害感受），对刺激的疼痛评分用作脊髓上伤害感受的评估指标。操纵检验表明，图片有效地操纵了情绪。此外，可以看到伤害性屈曲反射幅度和疼痛评分以平行方式受到调节。具体而言，观看不愉快的图片会增强伤害性屈曲反射和疼痛，而观看愉快的图片则会抑制反射和疼痛。分析表明，情绪效价而非唤醒介导了图片的影响。
