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Laryngeal electromyography in movement disorders: preliminary data.
Paulo A T Kimaid1, Elizabeth M A B Quagliato, Agrício N Crespo
1Servicio de Neurologia, Faculdade de Ciências Medicas, Universidade de Estadual de Campinas (UNICAMP), Campinas, SP, Brazil.
Arquivos De Neuro-Psiquiatria
|August 31, 2004
Summary
Laryngeal electromyography (LEMG) aids in diagnosing voice disorders like spasmodic dysphonia. Botulinum toxin treatment shows significant improvement for patients with movement-related dysphonia, making LEMG a routine diagnostic tool.
Area of Science:
- Neurology
- Otolaryngology
- Speech-Language Pathology
Background:
- Dysphonia resulting from movement disorders presents diagnostic challenges.
- Botulinum toxin is a therapeutic option for specific types of dysphonia.
Purpose of the Study:
- To present preliminary laryngeal electromyography (LEMG) data in patients with movement disorder-related dysphonia.
- To evaluate the efficacy of botulinum toxin treatment in this patient cohort.
Main Methods:
- Twenty-five patients with suspected laryngeal dystonia, spasmodic dysphonia (SD), vocal tremor, or Gilles de la Tourette syndrome (GTS) were included.
- Laryngeal electromyography (LEMG) was performed using monopolar electrodes prior to botulinum toxin administration.
Main Results:
- LEMG findings were consistent with dystonia in 14 patients, essential tremor in 3, and Parkinson tremors in 2.
- Five patients showed normal LEMG results.
- Significant improvement was observed following botulinum toxin therapy across patient groups.
Conclusions:
- LEMG provides valuable diagnostic information for movement disorder-related dysphonia.
- Botulinum toxin therapy is effective in improving dysphonia in these patients.
- Laryngeal electromyography is now a routine procedure in the UNICAMP movement disorders clinic.