MICROANATOMY

Detailed explanation-1: -Parkinson’s disease is a progressive disorder that is caused by degeneration of nerve cells in the part of the brain called the substantia nigra, which controls movement. These nerve cells die or become impaired, losing the ability to produce an important chemical called dopamine.

Detailed explanation-2: -Parkinson’s disease is marked by the death of dopamine-producing neurons in the brain-specifically in the substantia nigra, a structure deep within a region of the brain called the midbrain.