[Disfluency disorders other than stuttering].

Fluency disorders other than stuttering, which is the major and above all most known form, can be observed and require rehabilitation. Fluency is the quality which enables speech to flow effortlessly with a comfortable delivery, pace and simple transitions. Acquired over a period of several years during childhood, fluency can be altered by numerous neurological syndromes, such as Parkinson's disease, spasmodic dysphonia, or substitution phonations such as the esophageal or tracheoesophageal voice. Their severity is variable and judged above all by the efficacy of communication. Management of the duration and spacing of language segments and their homogeneity with respect to meaning are just as important as the stability of the phonatory organs.