Which neurotransmitter is primarily related to mood regulation?

Serotonin is primarily related to mood regulation due to its significant role in influencing emotional well-being, anxiety levels, and overall mood balance. It is often referred to as a "feel-good" neurotransmitter because its levels can greatly affect feelings of happiness and contentment. An imbalance in serotonin levels is commonly associated with mood disorders such as depression and anxiety.

In the context of other neurotransmitters, while dopamine is involved in pleasure and reward systems and norepinephrine plays a role in arousal and attention, it is serotonin that is more directly linked to mood stabilization. Acetylcholine, on the other hand, is largely associated with memory and learning rather than mood regulation. Thus, serotonin’s specific role in mood makes it the most relevant neurotransmitter in this context.