[A probe into the relationship between spasmodic dysphonia and laryngeal paralysis].
OBJECTIVE
To investigate into the relationship between spasmodic dysphonia and laryngeal paralysis.


METHODS
The intrinsic laryngeal muscle potential was recorded with electromyography. Vocal cord movements were observed with a videostroboscope. Laryngeal paralysis was divided into mild, moderate, and severe degrees based on the potentials of intrinsic laryngeal muscles and on the status of vocal cord movements.


RESULTS
In the past 12 years (from 1983 to 1994) 1300 cases were diagnosed as having mild, moderate, and severe laryngeal paralysis. Among them, there were 5 cases with laryngospasm including 3 mild, 1 moderate, and 1 severe case.


CONCLUSIONS
The findings obtained from careful observation on these 5 cases of spasmodic dysphonia demonstrated that there existed certain relationships between laryngeal paralysis and spasmodic dysphonia. During the course of exacerbation or restoration of paralysis, spasmodic dysphonia might occur.
Yang
S
S
Second Clinical College, Chinese Medical University, Shenyang 110003.
He
P
P
Lu
S
S
D000328:Adult; D004576:Electromyography; D005260:Female; D006801:Humans; D007821:Laryngeal Muscles / Q000503:physiopathology*; D008297:Male; D014826:Vocal Cord Paralysis / Q000150:complications* / Q000503:physiopathology; D014832:Voice Disorders / Q000150:complications* / Q000503:physiopathology