Related Experiment Videos
[Electromyographic study of psychogenic dysphonias]
P Canals Ruiz1, C Villoslada Prieto, A Marco Peiró
1Servicio de ORL, Hospital de Sagunto, Valencia.
Acta Otorrinolaringologica Espanola
|August 26, 1998
Summary
Psychogenic dysphonia, a voice disorder, involves muscle coordination issues. Electromyography confirmed no nerve damage, supporting a functional diagnosis for these patients.
Area of Science:
- Laryngology
- Neurology
- Speech-Language Pathology
Context:
- Psychogenic dysphonia is often viewed as a functional voice disorder stemming from laryngeal muscle dyssynchrony.
- Distinguishing functional voice disorders from organic pathologies is crucial for accurate diagnosis and treatment.
- Previous understanding attributed psychogenic dysphonia to impaired synchronization of laryngeal abductor and adductor muscles.
Purpose:
- To investigate the laryngeal muscle function in patients diagnosed with psychogenic dysphonia using telelaryngoscopy and laryngeal electromyography.
- To exclude neuromuscular origins as a cause of the observed vocal disturbances.
- To confirm the diagnosis of psychogenic dysphonia by ruling out organic laryngeal pathology.
Summary:
- Five patients with psychogenic dysphonia underwent telelaryngoscopy and laryngeal electromyography.
- Initial observations showed a glottic gap during phonation, which resolved to complete glottic closure with normal phonation by examination's end.
- Laryngeal electromyography revealed normal motor unit potentials and absence of denervation activity, excluding neuromuscular damage.
Impact:
- The findings support the diagnosis of psychogenic dysphonia by definitively ruling out underlying neuromuscular disease.
- This study reinforces the understanding of psychogenic dysphonia as a functional disorder.
- Provides objective electrophysiological data to aid in the differential diagnosis of voice disorders.