Parkinsonism is a chronic neurological disorder characterized primarily by muscle stiffness. Parkinsonism is sometimes referred to as Parkinson's disease. Parkinsonism includes rigidity, tremor, slowness of movement, and impaired balance in posture. The name comes from Parkinson's disease, which is characterized by these symptoms. Parkinsonism can also be found in conditions other than Parkinson's disease, such as Lewy body dementia and Parkinson's disease dementia. Parkinsonism is a clinical syndrome characterized in Parkinson's disease by four motor symptoms: tremor, slowness of movement, contracture, and postural instability. Parkinsonian gait problems can lead to falls, and serious physical injuries are other common symptoms: