Not paralysis, but dystonia causes stridor in multiple system atrophy.

Abstract:

:Electromyography (EMG) was performed in 10 patients with multiple system atrophy, laryngeal or pharyngeal symptoms, or both. In patients with stridor, EMG during quiet breathing revealed persistent tonic activity in both abductor and adductor vocal cord muscles. In patients with dysphagia, the cricopharyngeal muscle showed persistent EMG activity throughout all phases of swallowing. Botulinum toxin injection into the adductor muscle determined subjective improvement and reduced tonic EMG activity. Therefore, the cause of stridor in multiple system atrophy is dystonia of the vocal cords.

journal_name

Neurology

journal_title

Neurology

authors

Merlo IM,Occhini A,Pacchetti C,Alfonsi E

doi

10.1212/wnl.58.4.649

subject

Has Abstract

pub_date

2002-02-26 00:00:00

pages

649-52

issue

4

eissn

0028-3878

issn

1526-632X

journal_volume

58

pub_type

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