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KMID : 0363120080210020126
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Korean Journal of Pain
2008 Volume.21 No. 2 p.126 ~ p.130
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Gender Differences in Heat Pain and Temporal Summation Threshold in Normal Volunteers
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Lee Joon-Ho
Cho Sung-Hwan
Kim Yong-Ik
Yoo Jae-Hwa
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Abstract
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Background: Females generally have a lower pain and temporal summation threshold than men. However, the results of studies designed to evaluate gender differences in the thresholds of heat pain and the temporal summation have been inconsistent. Newly developed device, CHEPS (Contact Heat Evoked Potential Stimulation) model of PATHWAY, have superiority on its fast rise and return time in temperature. Therefore we investigated gender differences in heat pain and temporal summation threshold.
Methods: Forty healthy volunteers (20 males and 20 females) were enrolled in this study. A thermode was
applied to the volar side of each volunteer’s left forearm and heat pain and the temporal summation thresholdbwas then measured. The heat pain threshold was estimated using the staircase method by starting from 36oCband then increasing the temperature in 0.5oC increments. The temporal summation threshold was estimated bybapplying five successive stimulation of the same temperature starting at 2oC lower than the heat pain thresholdband then increasing the temperature in 0.5oC increments.
Results: The mean heat pain thresholds was found to be 41.63 ± 1.63oC for males and 41.60 ± 1.84oC for females and the temporal summation thresholds were found to be 40.83 ± 1.64oC for males and 40.77 ± 1.93oC for females. The differences between males and females were not statistically significant.
Conclusions: The result of this study suggested that there are no gender differences in heat pain and temporal
summation threshold.
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KEYWORD
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gender difference, heat pain threshold, quantitative sensory testing, temporal summation
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