Acetylcholine
Involved in: Muscle action, memory
Potential Effect on Behavior: Increased arousal, enhanced cognition
Beta-endorphine
Involved in: Pain, pleasure
Potential Effect on Behavior: Decreased anxiety, decreased tension
Dopamine
Involved in: Mood, sleep, learning
Potential Effect on Behavior: Increased pleasure, suppressed appetite
Gamma-aminobutyric acid (GABA)
Involved in: Brain function, sleep
Potential Effect on Behavior: Decreased anxiety, decreased tension
Glutamate
Involved in: Memory, learning
Potential Effect on Behavior: Increased learning, enhanced memory
Norepinephrine
Involved in: Heart, intestines, alertness
Potential Effect on Behavior: Increased arousal, suppressed appetite
Serotonin
Involved in: Mood, sleep
Potential Effect on Behavior: Modulated mood, suppressed appetite