The Effect of Rasagiline on Cognition in Parkinson's Disease

Inclusion Criteria

• •age 40 or older
• •able to speak and read English, at least 6 years of formal education
• •a diagnosis of PD
• •have a family member or caregiver willing to fill out study questionnaires
• •Participants will have been on stable medication regimens (no new PD medications and no changes to existing PD medication dosages) for the 4 weeks prior to study enrollment.
• •If participants are already taking other Parkinson's medications at time of study enrollment, the dosages of these medications must remain stable throughout study participation.
• •Changes to existing Parkinson's disease medications dosages or addition of other medications to treat Parkinson's disease after study enrollment will result in removal from study.
• •Participants are allowed to begin non-PD medications or to have changes to their existing non-PD medications if these additions and changes are deemed medically necessary.