Please use this identifier to cite or link to this item: https://doi.org/10.1016/j.oooo.2011.11.010
Title: Clinical characteristics of lateral pterygoid myospasm: A retrospective study of 18 patients
Authors: Cao, Y.
Zhang, W.
Yap, A.U.J. 
Xie, Q.F.
Fu, K.-Y.
Issue Date: 2012
Source: Cao, Y., Zhang, W., Yap, A.U.J., Xie, Q.F., Fu, K.-Y. (2012). Clinical characteristics of lateral pterygoid myospasm: A retrospective study of 18 patients. Oral Surgery, Oral Medicine, Oral Pathology and Oral Radiology 113 (6) : 762-765. ScholarBank@NUS Repository. https://doi.org/10.1016/j.oooo.2011.11.010
Abstract: The available scientific literature on masticatory myospasm-induced oromandibular dystonia is limited. The objective of this study was to determine the clinical characteristics of lateral pterygoid myosapsm in a series of 18 patients. Clinical and electromyographic (EMG) data of 36 patients diagnosed with masticatory muscle myospasm were reviewed, and data from 18 patients with needle EMG-confirmed lateral pterygoid myospasm were extracted for retrospective study. The study population included 6 men and 12 women with a mean age of 53.2 ± 15.3 years. Patients' chief complaints, severity and frequency of myospasm, clinical observations, video recordings, and surface/needle EMG recordings were analyzed. Despite the variety of manifestations, 3 characteristic signs and symptoms of lateral pterygoid myospasm were observed. These were: 1) jaw function disabilities; 2) difficulty in jaw closing after wide opening; and 3) involuntary jaw movements. A differential diagnosis of lateral pterygoid myospasm should be included when oromandibular dystonia is accompanied by the fore mentioned. © 2012 Elsevier Inc. All rights reserved.
Source Title: Oral Surgery, Oral Medicine, Oral Pathology and Oral Radiology
URI: http://scholarbank.nus.edu.sg/handle/10635/46818
ISSN: 22124403
DOI: 10.1016/j.oooo.2011.11.010
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