parkinsonism

1. (neurology, pathology) A neurological syndrome characterized by tremor, bradykinesia, rigidity, and postural instability; a condition with the symptoms of Parkinson's disease, regardless of its cause.Examples: "In 1982, a number of young California drug addicts developed acute and severe parkinsonism after intravenous injection of a synthetic heroin contaminated by MPTP."; "However, it is important for the clinician to consider alternative diagnoses, particularly treatable, potentially reversible syndromes such as drug-induced parkinsonism, hydrocephalus and other structural abnormalities, Wilson's disease, and some forms of toxic, metabolic, and infectious parkinsonism."; "Can risperidone cause parkinsonism? What evidence suggests that J.R. has antipsychotic-induced parkinsonism?"Synonyms: Parkinson's syndromecountableuncountable