AI Article Synopsis
- The study aimed to evaluate the effectiveness of electromyogram (EMG) for diagnosing hemimasticatory spasm (HMS) in patients.
- Four patients diagnosed with HMS underwent both needle and surface electrode EMG testing.
- The results showed abnormal electrical activities in the trigeminal nerve during spasms, indicating that EMG is crucial for diagnosing HMS.
Article Abstract
Objective: To investigate the usefulness of electromyogram (EMG) in the diagnosis of the patients with hemimasticatory spasm (HMS).
Methods: Four cases with HMS were reported. All the 4 patients were undertaken needle and surface electrode EMG examination.
Results: Needle 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.
Conclusion: It is very important to use EMG for the diagnosis of HMS.
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