Answer :

Final answer:

Parkinson's disease is a neurodegenerative disorder which occurs due to loss of dopaminergic neurons in the substantia nigra of the basal ganglia. This area plays a crucial role in producing dopamine, which controls body movements. The loss of these neurons leads to Parkinson's disease symptoms.

Explanation:

Parkinson's disease is a degenerative illness of the nervous system which happens due to loss of dopaminergic neurons in the substantia nigra part of the basal ganglia in the brain. Dopaminergic neurons produce a chemical called dopamine, which is critical for controlling body movements. When these cells start to deteriorate and die, it leads to a decrease in dopamine levels thereby causing irregular movements, a hallmark symptom of Parkinson’s Disease.

The basal ganglia is a group of structures found in the brain which, among other functions, help with body movement coordination. Its specific section, substantia nigra, produces dopamine. Therefore degeneration here causes significant issues with motor control often seen in Parkinson’s patients.

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