Temperature perception and nociception.
Identifieur interne : 000567 ( Ncbi/Curation ); précédent : 000566; suivant : 000568Temperature perception and nociception.
Auteurs : Barry G. Green [États-Unis]Source :
- Journal of neurobiology [ 0022-3034 ] ; 2004.
English descriptors
- KwdEn :
- MESH :
- metabolism : Nociceptors, Pain, Thermoreceptors.
- methods : Pain Measurement.
- physiology : Sensory Thresholds, Thermosensing.
- Animals, Humans, Temperature.
Abstract
The specificity theory of somesthesis holds that perceptions of warmth, cold, and pain are served by separate senses. Although no longer accepted in all its details, the theory's basic assumptions of anatomical and functional specificity have remained guiding principles in research on temperature perception and its relationship to pain. This article reviews the response characteristics of thermoreceptors, temperature-sensitive nociceptors, and their associated pathways in the context of old and new perceptual phenomena, most of which cannot be satisfactorily explained by the specificity theory. The evidence indicates that throughout most of the perceptual range, temperature sensitivity depends upon coactivation of, and interactions among, thermal and nociceptive pathways that are composed of both specific "labeled lines" and nonspecific, multimodal fibers. Adding to this complexity is evidence that tactile stimulation can influence the way in which thermal stimulation is perceived. It is argued that thermoreception is best defined as a functional subsystem of somesthesis that serves the very different and sometimes conflicting demands of thermoregulation, protection from thermal injury, and haptic perception.
DOI: 10.1002/neu.20081
PubMed: 15362150
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