Chemicals that change behavior or mood by directly affecting activity of the postsynaptic cell are referred to as neurotransmitter
In a chemical synapse the postsynaptic membrane is the membrane that receives a signal from the presynaptic cell and respond via depolarization or hyperpolarization and neurotransmitter play an important role in neural communication and they are chemical messengers that carry massages between nerve cell and other cell in your body and influencing everything from mood to involuntary movements and monoamine neurotransmitter such as dopamine are the most important neurotransmitter in the pathophysiology of mood disorders
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