Dopamine gift inside the caudate nucleus of mind is answerable for maintaining posture while that present within the nucleus accumbens is related to animal's speed. Two kinds of number one dopamine receptors are recognized namely D (stimulatory) and D (inhibitory). Both those receptors require G-protein for their hobby. D receptors are located at the dopaminergic neurons and bring bad remarks. They are also referred to as auto-receptors as they can inhibit the discharge and synthesis of dopamine. The binding of dopamine to the D receptors stimulates the activity of Adenylyl cyclase (AC) which converts ATP into cyclic AMP (nd messenger). The cyclic AMP (cAMP) then binds with the protein kinase .