While numerous auditory systems have been studied, few studies have related to effects of auditory information to the human somatosensory cortex. Therefore, we investigate the effects of auditory stimulation on the human somatosensory cortex during exercise or not. To clarify these effects, the activity of somatosensory evoked potentials (SEP) were recorded from Fpz and P3' during auditory stimulation and exercise. Firstly, it was found that auditory stimulation suppressed the amplitude of N{sub}20 when it preceded the electric stimulation at 20 ms. Secondly, the exercise task without auditory stimulation suppressed SEP responses. Lastly exercise with auditory stimulation suppressed SEP responses more than exercise without auditory stimulation. These results suggested that somatosensory activity is effected by auditory information and exercise.
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