Acetylcholine (ACh)

• Excitatory/Inhibitory
• Function: muscle action (PNS), autonomic regulation, cognition, pleasure
• cholinergic

GABA

• Inhibitory
• inhibitory in CNS (acts as breaks for excitatory neurotransmitter)
• animo acid

Glutamate

• excitatory (ONLY)
• learning and memory
• amino acid

dopamine

• excitatory/inhibitory
• movement, reward/pleasure, goal-directed behavior
• amine

serotonin

• inhibitory
• sleep, appetite, arousal, mood, sensory perception, emesis, appetite
• amine

norepinephrine (NE)

• excitatory/inhibitory
• attention to sensory, mood
• amine

substance p

• excitatory/inhibitory
• mood regulation, respiratory rhythm, transmits pain signals
• peptide

histamine

• inhibitory
• arousal, hormone productions
• amine

opioid peptides

• inhibitory
• inhibit perception of pain
• peptide

INHIBITORY

• G / O / S / H
• Gaba
• Opioid peptides
• Serotonin
• Histamine

INHIBITORY/EXCITATORY

• D / A / N / S
• Dopamine
• Acetylcholine
• Norepinephrine
• Ssubstance S

EXCITATORY (only)

• GLUTES
• Glutamate