The primary function of neurotransmitters in the brain is to facilitate communication between neurons and other cells. These chemical messengers transmit signals across synapses, allowing for the transmission of information throughout the nervous system. Neurotransmitters play vital roles in regulating various functions, including mood, cognition, and motor skills. Different neurotransmitters, such as dopamine, serotonin, and acetylcholine, have distinct effects on behavior and physiological processes. Proper neurotransmitter balance is essential for mental health and overall brain function, and imbalances can lead to various neurological disorders.