Dissociation between pain and the nociceptive blink reflex during psychological arousal
Koh, C. and Drummond, P.D. (2006) Dissociation between pain and the nociceptive blink reflex during psychological arousal. Clinical Neurophysiology, 117 (4). pp. 851-854.
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To investigate the effect of psychological arousal on pain ratings and the R2 component of the electrically evoked blink reflex to a ‘pure’ noiciceptive stimulus. Pain ratings and R2 to a noiciceptive stimulus (pulse width 0.3 ms, 2 mA, delivered from a concentric electrode attached to the supraorbital region of the forehead) were investigated in 16 healthy participants before and during a serial subtraction task, and in 16 control participants who sat quietly during nociceptive stimulation. Pain ratings decreased whereas R2 amplitude increased during the serial subtraction task. Supra-spinal rather than spinal mechanisms inhibited pain perception during psychological arousal. Moreover, psychological arousal facilitated the R2 component of the blink reflex to a nociception-specific stimulus. Supra-spinal influences need to be considered during clinical evaluation of the trigeminal nociceptive blink reflex.
|Publication Type:||Journal Article|
|Murdoch Affiliation:||School of Psychology|
|Copyright:||2006 International Federation of Clinical Neurophysiology.|
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