Abductor neurological disfunction (palsy) is the inability of the vocal fold to move away form midline. In bilateral involvement, this causes narrowing of the glottic opening with the potential of airway obstruction and stridor. The paralysed vocal folds in paramedian positions are shown in this short clip. There is paradoxical vocal folds mucosal indrawing on inspiration (because of Bernoulli's effect which causes stridor). Another voice defect is hoarseness.
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