1c:I[10327,["/_next/static/chunks/8c5514ae30cab478.js","/_next/static/chunks/fb4837e9c921d51a.js","/_next/static/chunks/0383663887945ae7.js","/_next/static/chunks/0f0179d8d6c03dbe.js","/_next/static/chunks/c14835f6f9fa3d39.js","/_next/static/chunks/70c3a19f1bab6f27.js"],"default"] 1d:T469,Abstract Ventricular dysphonia is a poorly understood disorder involving ventricular fold participation during phonation. A population of ventricular dysphonia patients was evaluated using phonatory function studies such as laryngovideostroboscopy, advanced acoustic analysis, and electroglottography to identify shared epidemiologic characteristics and to discuss possible neuromuscular mechanisms and causes. Forty patients with ventricular dysphonia were studied and epidemiologic, acoustic, and histologic data were analyzed. In almost all cases, the authors found abnormalities affecting the glottis caused by a related medical condition. The abnormalities included true vocal cord (TVC) aperiodicity in 100% of the patients, TVC asymmetry in 65%, a laryngeal mass or foreign body (usually Teflon®) in 35%, TVC erythema or edema in 32.5%, and TVC bowing in 22.5%. Ventricular dysphonia seems to be primarily a compensatory mechanism for glottic dysfunction. Therapy is based on identifying and correcting the underlying abnormalities. Laryngovideostroboscopy is a particularly important tool in examining chronic dysphonia.1e:T42a,

Present Interpretation of Laryngoplegic Findings

Previous papers were devoted to the clarification of certain pathologic concepts dealing with laryngeal paralysis. Until further information will resolve some remaining discrepancies in the analysis of laryngeal neurology, we may follow the detailed presentation by Pressman and Kelemen.⁵³These authors join a large group of investigators in assuming thatmidline positionof the paralyzed vocal cord usually indicates complete paralysis of the inferior laryngeal nerve. Abducted position in theintermediate line, however, is generally interpreted as a sign of combined and complete paralysis of both the inferior and the superior laryngeal nerves. In order to identify the accepted terms for the various vocal cord positions, Figure 1 summarizes the definitions used in this discussion. It was a peculiar coincidence that three independent authors published three extensive reviews of the same problem and came to very similar conclusions: Berendes⁹in May, 1956; Tschiassny

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References