Disorders due to Neurologic Disease A. Generally related to insult to parts of the nervous system that are part of phonatory mechanism. These can be vascular, infectious, traumatic, neoplastic, or degenerative in origin. B. Technically these are dysarthrias. This worsens as the voice is fatigued. The basis is flaccid vocal folds producing turbulence and increased volume in the glottis along with failure to develop complete closure of glottis during the cycle.
Phonation is hoarse or harsh, pitch is low and monotonous, loudness is reduced.
Inappropriate crying or laughter may be present. Voice quality produced by hyperadduction of the vocal folds with resultant glottic constriction. Components of both flaccid and spastic dysarthria are noted. Phonation has a wet or gurgly quality. Flutter or voice tremor is noted.