Hemimasticatory muscle spasm: an electromyogram analysis.
- Author:
Yu-wei WANG
1
;
Xu-chen MA
;
Zhen-kang ZHANG
;
Ding-guo SHEN
;
Feng-xia SU
;
Kai-yuan FU
Author Information
- Publication Type:Journal Article
- MeSH: Adult; Diagnosis, Differential; Electromyography; Female; Humans; Male; Masticatory Muscles; physiopathology; Middle Aged; Spasm; diagnosis; etiology; physiopathology
- From: Chinese Journal of Stomatology 2004;39(2):155-157
- CountryChina
- Language:Chinese
-
Abstract:
OBJECTIVETo investigate the usefulness of electromyogram (EMG) in the diagnosis of the patients with hemimasticatory spasm (HMS).
METHODSFour cases with HMS were reported. All the 4 patients were undertaken needle and surface electrode EMG examination.
RESULTSNeedle electrode EMG of the 4 patients with HMS showed grouped potentials synchronously with the onset of the spasm, which indicated abnormal excitatory electrical activities of the trigeminal nerve resulting in involuntary masticatory muscle movements.
CONCLUSIONIt is very important to use EMG for the diagnosis of HMS.
