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An electromyographic study of aspects of ‘deprogramming’ of human jaw muscles
Author(s) -
DONEGAN S. J.,
CARR A. B.,
CHRISTENSEN L. V.,
ZIEBERT G. J.
Publication year - 1990
Publication title -
journal of oral rehabilitation
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.991
H-Index - 93
eISSN - 1365-2842
pISSN - 0305-182X
DOI - 10.1111/j.1365-2842.1990.tb01422.x
Subject(s) - isometric exercise , posterior teeth , medicine , anterior teeth , electromyography , anatomy , orthodontics , physical medicine and rehabilitation , physical therapy
Summary Surface electromyograms from the right and left masseter and anterior temporalis muscles were used to detect peripheral correlates of deprogramming, also known as programming and reprogramming, of jaw elevator muscles. Putative deprogramming was attempted through the clinically recommended use of a leaf gauge, placed for 15 min between the maxillary and mandibular anterior teeth and disoccluding the posterior teeth by about 2 mm. Studied contractile activities were those of postural activity (subconscious, semi‐isometric, minimal activity) and intercuspal teeth clenching (conscious, isometric, maximal activity). Use of the leaf gauge did not affect normalized postural activity (about 4%), the duration (about 900 ms) and static work efforts of clenching (about 1200 μV.s), the time to peak mean voltage of clenching (about 400 ms), and the peak mean voltage of clenching (about 300 μV). Activity and asymmetry indices showed that the studied motor innervation patterns were not changed by the leaf gauge.