Answer:
Substantia nigra
Explanation:
The substantia nigra is the part of the mid-brain. It is also considered the part of the basal ganglia. It is dark and unstained tissue of the brain. It is also called a black substance because of its dark color. Dopamine that plays a great role in Parkinsonism founded in the substantia nigra. This procedure of neuro-chemical leads to the symptoms of Parkinson's disease that related to the death of dopamine cells in the brain.
It is being the part of play role in Parkinson disease, it also plays a part in motor control. Thus if some disturbance occurs in substantia nigra it caused Parkinson's disease in a person.
