Speech and language disorders in Parkinson's disease (habilitation project)

1966-1970

Studies of the language of German pre- and post-surgery patients suffering from Parkinson's disease. Paper-and-pencil as well as spectographic analyses revealed that the patients suffered from loss of motor control of the articulatory mechanisms. The glottal and superglottal mechanisms can be affected independent of each other. This yields three types of patients: one type suffering only from glottal defects, another type suffering from superglottal defects, and a third type suffering only from both.