Which neurotransmitter is associated with movement and attention?

• A. Acetylcholine
• B. Dopamine
• C. Serotonin
• D. Norepinephrine

Answer: (B)

Movement and attention are both guided by dopamine, a chemical that modulates signaling in brain networks for action and focus. In movement, dopamine supports the smooth operation of motor circuits in the basal ganglia, helping coordinate actions; when dopamine signaling is reduced, movement can become slow or rigid. In attention, dopamine enhances signaling in the prefrontal cortex, aiding focus, working memory, and the ability to filter distractions. Other neurotransmitters play roles in related functions—acetylcholine is crucial for muscle contraction and also has learning roles, norepinephrine boosts alertness but isn’t the primary driver of movement control, and serotonin affects mood and other processes—yet dopamine best fits both movement and attention in one messenger.