What Are the Stages of Parkinson's Disease?

Parkinson's disease, also known as tremor palsy, is a chronic disease of the central nervous system that affects the ability of patients to move, and it mostly occurs in people older than middle-aged. The early manifestations of this disease include resting tremor, muscle rigidity, slow movement, difficulty in initiating movement, and abnormal posture. Resting tremor is an uncontrolled tremor of the patient's hand or arm, which appears at rest or exacerbates emotional stress.