Abstract In neuropsychological studies of Parkinson's disease, cognitive deficits are frequently reported, but the nature of these deficits is not clear. As fas as cognitive deficits are manifest in parkinsonian patients at an early stage of the disease, many studies tend to describe them as fitting a frontal syndrome. The present studies provide evidence that the congnitive deficits of parkinsonian patients display a certain similarity with those of patients with frontal dysfunction at the level of the ultimate performance, but that the underlying processes have a dinstinct character.
Parkinsonian patients exhibit a decrease in selfgenerated problem-solving.
This deficit is manifest at a level of congnitive function, which goes beyond task or domain. All Rights Reserved.