Key Findings:  PET scan of participating Parkinson's patients showed decreased CB1 receptor sites in portions of the brain strongly correlated with ill-effects in executive functioning, episodic memory, and visuospatial functioning.
Type of Study:  Meta-analysis
Study Sample Size:  38
Study Result:  Inconclusive
Cannabinoids Studied:  Not Applicable
Phytocannabinoid Source:  Not Applicable