Does Cognitive Impairment Affect Rehabilitation Outcome in Parkinson's Disease?

In order to explore the question how an intensive, goal-based and aerobic rehabilitation treatment, addressed to act on motor and mental aspects, affects motor and functional symptoms in PD patients with normal cognition and with different level of cognitive impairment. Hypothesis is that a specific rehabilitation program based on motor-cognitive training and repetition, can affect positively the rehabilitation outcome regardless of baseline cognitive profile.