Voice spectrography in the evaluation of myasthenia gravis of the larynx.
Myasthenia gravis is a neuromuscular disorder that affects striated muscles especially those innervated by the cranial nerves. The standard diagnostic regimen is to find a reversal of symptoms by acetylcholine esterase administration. The permanent and objective recording of this effect is the key to an accurate assessment of this test. The voice spectrograph is a noninvasive means of evaluating the voice. It has been used successfully to make a clear and specific diagnosis of myasthenia gravis as it affects the larynx. The test can be used to distinguish myasthenia gravis from other functional, anatomical and neuromuscular laryngeal disorders.
D000328:Adult; D000368:Aged; D004491:Edrophonium; D005260:Female; D006801:Humans; D007818:Laryngeal Diseases / Q000175:diagnosis* / Q000503:physiopathology; D008297:Male; D008875:Middle Aged; D009157:Myasthenia Gravis / Q000175:diagnosis* / Q000503:physiopathology; D014827:Vocal Cords / Q000503:physiopathology*; D014831:Voice; D014833:Voice Quality
D004491:Edrophonium