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Structure and function of masticatory muscles in a case of muscular dystrophy
Author(s) -
Bakke Merete,
Kirkeby Svend,
Jensen Birgit Leth,
Hansen Hans Jorgen,
Kreiborg Sven,
HjørtingHansen Erik,
Michler Lars,
Møller Eigild
Publication year - 1990
Publication title -
journal of oral pathology and medicine
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.887
H-Index - 83
eISSN - 1600-0714
pISSN - 0904-2512
DOI - 10.1111/j.1600-0714.1990.tb00856.x
Subject(s) - masticatory force , muscular dystrophy , medicine , anatomy , connective tissue , wasting , digastric muscle , electromyography , masseter muscle , tongue , myotonic dystrophy , dystrophy , swallowing , pathology , orthodontics , dentistry , physical medicine and rehabilitation
Histologic examination of muscle biopsies and functional examination comprising electromyography and force measurements in a 19‐yr‐old boy with muscular dystrophy showed different wasting patterns of mandibular elevator and depressor muscles. Pronounced histopathologic changes were present in the masseter muscle, whereas pathologic findings in the anterior digastric muscle were limited to increased number of cells in slightly enlarged interfiber connective tissue. The masticatory pattern was distorted, and strength of mandibular elevator muscles was less than one third of the norm, whereas depressor strength corresponded more to reference values. This difference of muscular wasting might be caused by protective enzymes in the digastric muscle and/or functionally induced damage of the masseter. As affection from muscular dystrophy may vary greatly between the masticatory muscles, structural and functional examination should be used routinely to clarify prognosis before initiation of treatment procedures.