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Exteroceptive suppression of masseter muscle: assessment of two methods for quantitating suppression periods
Author(s) -
Hansen P. O.,
Svensson P.,
Nielsen J.,
ArendtNielsen L.,
Jensen T. S.
Publication year - 1998
Publication title -
acta neurologica scandinavica
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.967
H-Index - 95
eISSN - 1600-0404
pISSN - 0001-6314
DOI - 10.1111/j.1600-0404.1998.tb00638.x
Subject(s) - masseter muscle , stimulus (psychology) , medicine , nociception , sensory threshold , analysis of variance , threshold of pain , audiology , anesthesia , dentistry , psychology , receptor , psychotherapist , cognitive science
Objectives – The late exteroceptive suppression period (ES2) of the masseter muscle is conventionally quantified by a combination of measures of duration, amplitude, or mean activity. The combination of measures makes it difficult to compare ES2s obtained from different set‐ups. An unbiased method for quantitating ES2 is introduced allowing ranking of ES2s. The introduced method is utilized to evaluate stimulus and recording conditions under which ES2 is maximal. Material and methods – Fifteen male volunteers participated in 3 experiments designed to determine the effect of level of teeth clenching, stimulus intensity, and perceived pain intensity on the ES2. Results – Coefficients of variance (1 h/1 month) were: duration: 11%/43%, latency: 9%/12%, and magnitude of suppression: 11%/12%. A level of teeth clenching of 66% of maximal voluntary bite force, and a stimulus intensity below pain detection threshold was associated with maximal magnitude of suppression of ES2. Conclusion – The introduced method is reproducible and allows ranking and stimulus‐response estimations of ES2. It is suggested that ES2 does not reflect activity along the nociceptive pathways in the trigeminal region.