Tracheostomy abolishes paradoxical activation of the vocal cord adductor in multiple system atrophy

Auris Nasus Larynx. 2006 Sep;33(3):295-8. doi: 10.1016/j.anl.2005.11.018. Epub 2006 Jan 6.


Objectives: Inspiratory activation of the vocal cord adductor, which causes paradoxical vocal cord motion, develops in patients with multiple system atrophy (MSA). To confirm the hypothesis that airway reflexes trigger such paradoxical activation, we investigated the effects of tracheostomy on the adductor activation in a MSA patient.

Methods: We compared the adductor electromyograms before and after breathing was diverted to a tracheostoma under propofol anesthesia.

Results: The adductor inspiratory activation disappeared during tracheostoma breathing.

Conclusion: Airway reflexes as well as MSA-related damage to the respiratory center contribute to the generation of paradoxical adductor activation in MSA patients.

Publication types

  • Case Reports
  • Comparative Study

MeSH terms

  • Electromyography
  • Humans
  • Inhalation / physiology*
  • Laryngeal Muscles / physiopathology*
  • Laryngoscopy
  • Male
  • Middle Aged
  • Multiple System Atrophy / complications
  • Multiple System Atrophy / physiopathology*
  • Multiple System Atrophy / surgery
  • Respiratory Sounds / etiology
  • Respiratory Sounds / physiopathology*
  • Sound Spectrography
  • Tracheostomy*
  • Vocal Cord Paralysis / etiology
  • Vocal Cord Paralysis / physiopathology
  • Vocal Cord Paralysis / surgery
  • Vocal Cords / pathology
  • Vocal Cords / physiopathology*