A) midbrain
B) thalamus
C) hypbthalamus
D) cerebrum
Correct Answer: A
Solution :
Parkinsons disease also known as paralysis agitans results from widespread destruction of that portion of the substantia nigra (Pars compacta) of mesencephalon (midbrain) that sends dopamine secreting nerve fibres to the caudate nucleus and putamen. The disease is characterised by (i) Rigidity of much of the musculature of body (ii) Involuntary tremor of the involved area (iii) Serious difficulty in initiating movement called akinesia. Brocas aphasia and Wernickes aphasia are due to injury in frontal lobe and temporal lobe of the cerebrum of brain.
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