Neuron

1. Norepinephrine (NE)

1.1. Involved in emotion and behavior

1.2. Involved in the regulation of sleep-wake cycles, sustained attention, alertness and biological responses to new stimuli

1.3. Mediates anxiety, fear, and stress responses

1.4. Wakefulness and alertness are the two major functions

2. Serotonin (5-HT)

2.1. Involved in the inhibitions of activity and behavior

2.2. Plays a huge role in mood, anxiety, arousal, irritability, tranquility, pain regulation, cognition, appetite, sleep-wake cycles, and obsessions

2.3. Temperature regulation

3. GABA

3.1. Inhibitory nature

3.2. Helps control muscle activity

3.3. Makes the brain more stable by decreasing the neural transmission that prevents overexcitation

4. Dopamine (DA)

4.1. Involved in emotion and behavior

4.2. Has excitatory and inhibitory effects in the brain

4.3. Involved in behavioral regulation, movement, learning, mood, and attention

5. Acetylcholine (ACh)

5.1. Excitatory nature

5.2. Governs muscle contractions

5.3. Plays a role in memory, learning, behavioral arousal, attention, mood, and rapid eye movement during sleep

5.4. Causes glands to secrete hormones