Parkinson's Disease: Diagnosis and Clinical Management - Hardcoverby Aubrey Walsh (Editor) Parkinson's disease (PD) is a neurodegenerative condition characterized by bradykinesia, rigidity and resting tremor. This disease has motor and non motor symptoms. Some of the common symptoms of this disease are trembling of hands, inadequate balance and coordination, and low movement. Individuals with Parkinson's disease may experience melancholy, sleep issues, or difficulty in chewing, etc. In early stages, symptoms appear