Which neurotransmitter is primarily associated with mood regulation and arousal?

The neurotransmitter primarily associated with mood regulation and arousal is serotonin. This chemical plays a critical role in regulating mood, anxiety, and overall emotional well-being. High levels of serotonin are often linked to feelings of happiness and well-being, while low levels can contribute to mood disorders such as depression and anxiety.

Serotonin is also involved in various physiological functions, including sleep cycles and appetite regulation. Its impact on mood and emotional states makes it a central focus in treating mood-related disorders, often being targeted by antidepressant medications that aim to increase serotonin levels in the brain.

While norepinephrine does play a role in mood and arousal, it is more primarily associated with the body’s stress response and alertness rather than the regulation of mood itself. Dopamine is also linked to pleasure and reward mechanisms, but it has a different primary function compared to serotonin. Acetylcholine primarily affects memory and learning rather than mood regulation. Understanding these distinctions helps clarify the role of serotonin in mental health and overall emotional well-being.