The three neurotransmitters that play a major role in the development of the brain are glutamate, dopamine and serotonin. The hormone glutamate is an excitatory neurotransmitter and is associated with the functions in the synaptic cleft. This neurotransmitter helps in bringing synaptic balance in the brain of the individual. The hormone dopamine is associated with pleasure. It also helps in influencing the decision making ability of the individual. The levels of dopamine also increase in the limbic system. Serotonin is responsible for the regulation of the behaviour and mood of the individual. The changes in levels of dopamine and serotonin are responsible for making the emotional quotient of the individual.