[Impairment of speech and communication skills in dementia].

Dementia results not only in the impairment of cognitive-mnestic skills, but also of communication skills. Symptoms include difficulties in finding words and limited expression. The diagnosis of speech and language pathologies in dementia is problematic because there are no standard examination methods. Furthermore, it is difficult to distinguish dementia from semantic dementia, Broca's aphasia and chronic progressive aphasia.