Parkinson's disease is a long suffering movement disorder /degenerative disorder of the central nervous system.Nerve cells use a chemical called dopamine(neurotransmitter) which helps to control the movement and coordination of the muscles.When this disease occurs the amount of dopamine decreases and the nerve cells in the brain are slowly destroyed which leads to the loss of muscle function and makes the person unable to control the movement. It affects both men and women,most often affects after age 50.

Symptoms:
-Shaking of the hands, arms, legs, jaw and face.
-Problems with balance and walking.
-Rigid and stiff body.
-Difficult in Writing,Reading and Eating.
These symptoms continue and worsen over time..

Treatment:
This disease is arising from an unknown causes, and presently there is no known cure.There are treatment options
such as medication and surgery to control and relieve its symptoms.In some cases surgery is performed to improve
the health.The prognosis is according to the patients age and symptoms.

It is not only from inherited cases, but also those with no familial link. ... People who possess the mutation have a 50 percent chance
of passing it on to next. if a male carriers are not affected by the disorder, but they can pass on the defective to next generation.
Each cell in the body contains two copies of each gene: one that originally came from the egg of the mother and one from the sperm of the father.
A gene with a defect that causes a particular disease may be passed through generations of a family without causing illness.
However, if a child inherits two genes with the defect, the child will develop the illness.