An analysis of electromyographic types of 16 cases with hemimasticatory spasm
- VernacularTitle:16例半侧咀嚼肌痉挛肌电图类型分析
- Author:
Zhaohui YANG
;
Yanping ZHAO
;
Qiufei XIE
- Publication Type:Journal Article
- Keywords:
Spasm;
Electromyography;
Motor unit potential
- From:
Journal of Practical Stomatology
2000;0(05):-
- CountryChina
- Language:Chinese
-
Abstract:
Objective:To investigate varied electromyographic types in the patients with hemimasticatory spasm(HMS).Methods:Surface electromyography was recorded to study electromyographic features of 16 cases with HMS.Results:Spasm was found in mandibular rest position in 2 cases and in tooth contact position in 14 cases.During the involuntary spasm of the 14 cases, motor unit potential could be classified into three types:continuous(8 cases), rhythmic(3 cases) and irregular(3 cases).Conclusion:The electromyographic feature of hemimasticatory spasm is characterized by continuous motor unit potential discharge. The spasm is mostly triggered by tooth contact.
