Parkinson's disease is a disorder that occurs gradually in the nervous system and affects the movement. Develops gradually, and sometimes starts a noticeable tremor in one hand. But although Parkinson's is the most common marker of Parkinson's disease, the disorder also usually causes stiffness or slow movement. In the early stages of Parkinson's disease, some expressions may appear on your face, no expressions appear, or your arms may not swing as you walk. Your words may become faint or unclear. Symptoms of Parkinson's disease worsen as your condition develops over time. There is no cure for Parkinson's disease, but in spite of that, drugs can help improve symptoms. Occasionally, your doctor may suggest surgery to stimulate specific areas of the brain, leading to better symptoms.

Muscular atrophy is a group of diseases that cause progressive muscle weakness and loss of mass. In the case of muscular dystrophy, abnormal genes (mutations) disrupt the production of the desired protein for muscle health formation.

There are many types of muscle atrophy. Symptoms of most common types begin in childhood, most of them affecting boys. Other species do not appear until adulthood.