title: Effects of level and summation of pain on adaptation phenomena.
abstract: The time course of pressure stimulus intensity adjusted by 9 human subjects to maintain a constant pain sensation at a weak, tolerable or severe level during 30 min was recorded. Significant adaptation phenomena occurred when subjects received a severe pain sensation. Summation of two pain sensations at any level did not significantly change the stimulus intensities adjusted to maintain these sensations constant.
mesh_terms: D000222:Adaptation, Physiological; D000293:Adolescent; D000328:Adult; D005260:Female; D005385:Fingers; D006801:Humans; D008297:Male; D010146:Pain / Q000503:physiopathology*; D011601:Psychophysics