EMG provides diagnostic and therapeutic guidance for patients with cervical dystonia.
This systematic review assessed the clinical value and advances of electromyography (EMG) in patients with cervical dystonia. The review did not report the specific number of studies included, the publication types, or the sample size of the underlying data. The setting of the original studies was not reported.
The main findings indicate that EMG provides crucial electrophysiological evidence for diagnosis and differential diagnosis. It enables precise targeting of affected muscles for botulinum toxin injections and offers objective references for deep brain stimulation. Additionally, EMG captures abnormalities in central pattern generators and serves as a reliable tool for quantifying therapeutic effects. The review noted that long-term follow-ups were part of the evidence base.
Regarding safety and tolerability, the review reported that reducing adverse reactions was a noted benefit, while serious adverse events, discontinuations, and general tolerability were not reported. The primary limitation identified was operator dependence. Funding sources and potential conflicts of interest were not reported.
The authors concluded that EMG is indispensable in the clinical management of cervical dystonia. However, given the limitation of operator dependence, clinicians should interpret these findings conservatively. The review did not establish causality, and the certainty of the evidence was not explicitly graded beyond the noted limitations.
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