They are, in order of distance from Neptune: Naiad (48,227 km), Thalassa (50,074 km), Despina (52,526 km), Galatea (61,953 km), Larissa (73,548 km), S/2004 N 1 (105,300 Â± 50 km), and Proteus (117,646 km).
In this article. Font Size. A. A. A. Parkinson's disease is caused by the progressive impairment or deterioration of neurons (nerve cells) in an area of the brain known as the substantia nigra. When functioning normally, these neurons produce a vital brain chemical known as dopamine.here is considerable controversy surrounding the possibility of a genetic cause of Parkinson's disease. In a small number of families, specific genetic abnormalities leading to the illness have been identified.
Parkinson's disease is a neurodegenerative disorder, which leads to progressive deterioration of motor function due to loss of dopamine-producing brain cells. The cause of Parkinsonâs Disease is unknown, but researchers speculate that both genetic and environmental factors are involved. Some genes have been linked to the disease.