Neurotransmitters and Psychological Disorders

Neurotransmitters are chemical substances that relay signals between nerve cells across synapses. Neurotransmitters are secreted by presynaptic nerve fibers into synaptic cleft and adhere to specific receptors in the postsynaptic nerve fibers. Neurotransmitters are also found at axonal ends of motor neurons.  They are involved in body communication and control various body functions such as mood, sleep, concentration, and others.