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
Neurologyjournal_title
Neurologyauthors
Merlo IM,Occhini A,Pacchetti C,Alfonsi Edoi
10.1212/wnl.58.4.649subject
Has Abstractpub_date
2002-02-26 00:00:00pages
649-52issue
4eissn
0028-3878issn
1526-632Xjournal_volume
58pub_type
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