Cognitive dysfunction in idiopathic and vascular parkinsonism.

Aim: To evaluate the characteristics of cognitive disturbances in patients with parkinsonism and to point out the need of following up those changes by highly specific tests.

Methods: The first group consisted of patients with Parkinson's disease, and the second group of patients with vascular parkinsonism. The neuropsychological assessments were performed with mini mental state examination (MMSE) and the Raven progressive matrices.