Abstract
In the present research, we investigated how stressor evoked by cold water affected somatosensory perception. The SEPs (somatosensory evoked potentials) were recorded under three conditions. The first was a coldwater condition (C condition) in that immersion in cold water was regarded as the stressor. The second was a hotwater condition (H condition) in that participants immerse hot water. The third was no-stressor condition (N condition) in that no stressor was given. The SEPs were recorded by electrical stimulation to upper parts of inside arms of subjects. As a result, in the N condition, the amplitudes of both N26-P38 and N50-P62 were larger than those in both C and H conditions. Following these results, amplitudes of the SEPs decreased by immersion in cold or hot water. In conclusion, some kinds of stressor on a part of the skin affect the other somatosensory perception. (Japanese Journal of Physiological Psychology and Psychophysiology, 20 (3) : 241-247, 2002.)
