Document Detail

Thermal perception thresholds recorded using method of limits change over brief time intervals.
MedLine Citation:
PMID:  16503585     Owner:  NLM     Status:  MEDLINE    
Quantitative Sensory Testing (QST) of thermal perception thresholds assesses small afferent nerve function. QST has also been widely used to investigate the effects of interventions on the perception of activity within these nerve fibres, often over brief time periods. The natural variation in perception thresholds over brief time periods has not been determined, however, complicating accurate identification of induced changes. The present study therefore investigated changes in thermal perception threshold values within a 1-h period. Twenty-four healthy women volunteers aged 18-28 years (mean 20.6, SD 2.8) undertook cold sensation (CS), warm sensation (WS), cold pain (CP), and hot pain (HP) perception threshold measurements on the thenar eminence of the dominant hand during six 8-min experimental cycles. The order of stimulus presentation was randomized within pre-selected criteria. An adaptation temperature of 32 degrees C, a rate of temperature change of 0.5 degrees C/s, a 3 cm x 3 cm thermode, and a method of limits algorithm were used. Separate two-way ANOVAs with repeated measures showed statistically significant changes over time for WS, CS, and HP (p < 0.05), but not for CP (p = 0.232). The results indicate that WS, CS, and HP perception thresholds change significantly with repeated testing over a 1-h period. These results should be carefully considered when assessing the importance of observed changes in thermal perception thresholds. In research trials exclusion of a control group would be a fundamental flaw.
Shea T Palmer; Denis J Martin
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Publication Detail:
Type:  Journal Article; Research Support, Non-U.S. Gov't    
Journal Detail:
Title:  Somatosensory & motor research     Volume:  22     ISSN:  0899-0220     ISO Abbreviation:  Somatosens Mot Res     Publication Date:  2005 Dec 
Date Detail:
Created Date:  2006-02-28     Completed Date:  2006-05-24     Revised Date:  2006-11-15    
Medline Journal Info:
Nlm Unique ID:  8904127     Medline TA:  Somatosens Mot Res     Country:  England    
Other Details:
Languages:  eng     Pagination:  327-34     Citation Subset:  IM    
Faculty of Health & Social Care, University of the West of England, Bristol, UK.
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MeSH Terms
Differential Threshold
Reference Values
Reproducibility of Results
Sensory Thresholds*
Temperature Sense*
Time Factors

From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine

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