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RC-08-129

Effects of prior experience of pain on empathic feelings for painful pictures with measuring physiological indices.

[Speaker] Murase, Ayaka:1
[Co-author] Imai, Akira:1
1:Shinshu University (Japan)

We examined effects of prior experience of pain on empathic feelings for painful pictures with measuring physiological indices. Forty-five participants were assigned to either group of prior-experiencing pain or no-pain. The prior experience was being pressed by a needle with mild pain or just touched by the needle with no-pain. Both groups showed an overall increases of estimation of painfulness for painful pictures with female participants indicating greater painfulness than male. The most painful picture evoked larger feeling of pain in pain-experienced female than in no-pain. Although pupil diameter indicated only significant tendencies of effects of prior-experiencing and painful picture, LF/HF ratio of heart rate demonstrated substantial effects of pictures showing the most painful picture produced the most painful feeling. Results suggest that gender difference in empathic feelings of pain would be reflected in subjective estimation, while physiological responses might be sensitive for context of stimulus and prior experience.
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