Physiology / Western blotting / Alpha Synuclein / Cerebrospinal Fluid / Humans / Medical Physiology / Neurons / Western blot / Diagnostic Test / Culture Media / Extracellular Space / Parkinson Disease / Biochemistry and cell biology / Blood Plasma / Medical Physiology / Neurons / Western blot / Diagnostic Test / Culture Media / Extracellular Space / Parkinson Disease / Biochemistry and cell biology / Blood Plasma