TY - JOUR T1 - Dementia and cognitive impairment in Parkinson's disease. JF - Journal of Neurology, Neurosurgery & Psychiatry JO - J Neurol Neurosurg Psychiatry SP - 1498 LP - 1502 DO - 10.1136/jnnp.51.12.1498 VL - 51 IS - 12 AU - F Girotti AU - P Soliveri AU - F Carella AU - I Piccolo AU - P Caffarra AU - M Musicco AU - T Caraceni Y1 - 1988/12/01 UR - http://jnnp.bmj.com/content/51/12/1498.abstract N2 - The frequency of dementia, the clinical characteristics and the pattern of cognitive impairment were studied in 147 unselected Parkinsonian patients. Twenty-one patients (14.28%) were judged to be demented. They had a more severe and widespread cognitive deficit although they were affected particularly in those tests that already discriminated Parkinsonian patients from controls. A direct comparison of Parkinsonian dementia with other types of dementia is needed to validate the concept of subcortical dementia. ER -