Dopamine
Dopamine (DA) creates both excitatory and inhibitory post synaptic potential depending upon the post synaptic receptor. The neuron’s cell bodies of nigrostratial system are located in the substrantia nigra and then project their axon to the neostraitum: the caudate nucleus and putamen, which comprises of an important part of the basal ganglia, it is involved in the movement control. The cell body of the neuron of the mesolimbic system are located in the ventral tegmental area and project their axons to several parts of limbic system: Nucleus accumbens, hippocampus and amygdala. Nucleus acuumben plays important role in reinforcement effects. Dopamine has been largely termed as happy hormones because of this effect. The cell bodies of the neurons of mesocortical system are located in the ventral tegmental area. Their axons project to the prefrontal cortex, affects function such as formation of short term memory, planning strategy, preparation, concept utilization and problem solving.