Brainstem conduction abnormalities in spasmodic dysphonia.
Twelve spasmodic dysphonia patients were evaluated by three different auditory brainstem response parameters; 75% were abnormal. Three of the 12 had prolonged wave I-V interpeak latency. Seven had pathologic wave V latency shifts at a high stimulus rate. Amplitude ratios were normal for all subjects. The authors hypothesize that spasmodic dysphonia is a disorder of variable cranial nerve symptom presentations, and offer several possible models to account for its sporadic representation in the nervous system.
D000328:Adult; D001933:Brain Stem / Q000503:physiopathology*; D003389:Cranial Nerve Diseases / Q000150:complications; D005072:Evoked Potentials, Auditory; D005260:Female; D006316:Hearing Loss, High-Frequency / Q000150:complications; D006801:Humans; D008297:Male; D008875:Middle Aged; D009431:Neural Conduction; D011930:Reaction Time; D014832:Voice Disorders / Q000150:complications / Q000209:etiology / Q000503:physiopathology*