[Parkinson disease : how to improve the voice and the quality of life].
Parkinson disease is a progressive neurodegenerative disease affecting the basal ganglia and causing the degeneration of dopaminergic neurons. It is a chronic affection with a slow evolution characterized by motor dysfunctions. Considering voice and speech, 90 % of patients present problems affecting their communication, social skills and quality of life. Although L-dopa has some effect on motor performance, speech and voice do not improve. So, the applicability and efficacy of non-pharmacological treatment, based on therapy is to be considered for voice impairment. Today, voice therapy is being viewed as a therapeutic option to be prescribed early in the course of Parkinson disease that may potentially contribute to slowing of motor symptom progression.