Acetylcholine: Motor control over muscles, attentions, memory, learning, and sleeping. Epinephrine: Energy, formerly called adrenaline. Norepinephrine: Arousal and alertness. Serotonin: Emotional states, impulse control, and dreaming. Dopamine: Reward and motivation, motor control over voluntary movement. GABA (Gamma Amino Butyric Acid): Anxiety issues. Inhibition of Action Potentials: Anxiety reduction, intoxication (through alcohol). Glutamate: Enhancement of action potentials, learning, memory. Endorphins: Pain reduction, and reward.