Mood Regulation and Neurotransmitters

Neurotransmitters are essential chemical messengers that facilitate communication between neurons in the brain and throughout the body. One of the most well-known neurotransmitters is dopamine, which plays a critical role in movement, emotion, and reward mechanisms. Understanding the effects of various neurotransmitters is fundamental to the study of psychology. Which neurotransmitter is primarily associated with mood regulation and has been linked to depression when levels are low?