Linked Life Data

1887724

Source:http://linkedlifedata.com/resource/pubmed/id/1887724

Statements in which the resource exists as a subject.
PredicateObject
rdf:type
lifeskim:mentions
pubmed:issue
2
pubmed:dateCreated
1991-10-7
pubmed:abstractText
Mechanical probes of various sizes and shapes were used to determine thresholds for the perception of pressure, sharpness, and pain on the human finger. As force increased, perception changed from dull pressure to sharp pressure to sharp pain. With the smallest probe (0.01 mm2), sharpness threshold was very close to pressure threshold. As probe size increased, sharpness and pain threshold expressed in terms of force) increased in proportion to probe circumference (not probe area), whereas pressure threshold increased relatively little. Pain and sharpness thresholds also increased as probe angle became obtuse. There was a statistically significant increase in both thresholds with a probe angle change of 15 degrees. Thus, both size and shape are necessary to describe a mechanical stimulus adequately, and pressure (force/area) is not a sufficient metric for pain studies. Thresholds varied at different skin sites on the finger. The dorsal surface had lower thresholds than the volar surface, but the difference between the two areas was not always statistically significant. The compliance of the skin (e.g., the amount of indentation produced by a given force) exhibited no relation to sharpness or pain threshold, whether considered within subjects at various skin sites, or across subjects at the same skin site. Comparison of the perceptual thresholds with the thresholds for nociceptors determined in electrophysiological studies indicates that the sensation of nonpainful sharpness is likely to be mediated by nociceptors. Furthermore, considerably more than threshold activation of nociceptors is necessary for normal pain perception.
pubmed:language
eng
pubmed:journal
pubmed:citationSubset
IM
pubmed:status
MEDLINE
pubmed:issn
0899-0220
pubmed:author
pubmed:issnType
Print
pubmed:volume
8
pubmed:owner
NLM
pubmed:authorsComplete
Y
pubmed:pagination
137-47
pubmed:dateRevised
2006-11-15
pubmed:meshHeading
pubmed:year
1991
pubmed:articleTitle
Stimulus features relevant to the perception of sharpness and mechanically evoked cutaneous pain.
pubmed:affiliation
Department of Neurosurgery, SUNY Health Science Center, Syracuse 13210.
pubmed:publicationType
Journal Article, Research Support, U.S. Gov't, Non-P.H.S.