Sensory and affective dimensions of phasic pain are indistinguishable in the self-report and psychophysiology of normal laboratory subjects

Citation
Cr. Chapman et al., Sensory and affective dimensions of phasic pain are indistinguishable in the self-report and psychophysiology of normal laboratory subjects, J PAIN, 2(5), 2001, pp. 279-294
Citations number
44
Language
INGLESE
art.tipo
Article
Categorie Soggetti
Neurology
Journal title
JOURNAL OF PAIN
ISSN journal
1526-5900 → ACNP
Volume
2
Issue
5
Year of publication
2001
Pages
279 - 294
Database
ISI
SICI code
1526-5900(200110)2:5<279:SAADOP>2.0.ZU;2-J
Abstract
This study evaluated the discriminant validity of subjects differentially s caling the sensory and affective dimensions of pain. it sought to determine (1) whether subjects can differentially scale sensory and affective aspect s of phasic laboratory pain in the absence of task demand bias that fosters apparent differential scaling; (2) whether psychophysiologic responses to painful stimuli can predict pain report (PR); and (3) whether such response s contribute more to affective than to sensory judgments. Fifty-six men and 44 women repeatedly experienced varied painful electrical fingertip stimul i at low, medium, and high intensities. On half of the trial blocks, subjec ts made sensory judgments; on the remainder they made affective judgments. Response measures included PR, pupil dilation, heart rate, respiration rate , skin conductance response (SCR), and late near field evoked potentials. S ubjects did not rate the stimuli differently when making sensory versus aff ective judgments. The psychophysiologic variables, principally the SCR, acc ounted for 44% of the variance in the PR. Psychophysiologic response patter ns did not differentiate affective and sensory judgment conditions. Notewor thy sources of individual differences included baseline PR levels and the l inear effects of SCR on PR. (C) 2001 by the American Pain Society.