 All subjects, control,early PD diagnosis and atypical or late Parkinsonian Syndromes, will have 1 a medical and neuro history and physical including videotaping of movements, 2 neuropsychological testing, 3 a sleep study, 4 olfactory sense of smell testing, 5blood draw and LP for serum and CSF testing, 6 functional MRI. All of these procedures are often done in the diagnosis of PD. Any test performed prior to enrollment as part of the clinical evaluation may be used in place of repeating the procedure. Subjects will have 1 set of study visits up to 3 visits in order to accomplish a complete set of data. 