D2 receptors are maximally seen in:-
The impoant pathways in the brain that release dopamine as transmitter: Nigrostriatal pathway in basal ganglia - The fibers convey from substantia nigra of the midbrain to the corpus striatum in basal ganglia. It is an impoant pathway in the control of voluntary movements. Mesolimbic system - From the midbrain to the limbic system. The pathway is impoant in the control of emotions and emotion-related movements.
Frontal lobe
Nucleus accumbens
Cerebellum
Corpus striatum
Introduction to Central Nervous System