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chemical messengers of neurons; ex: actylcholine, dopamine, serotonin, norepinephrine, GABA, endorphins
neurotransmitter associated with learning, memory, and muscle contractions; associated disorders: alzheimer's
neurotransmitter associated with movement, thought processes, and rewarding sensations; associated disorders: parkinson's disease, schizophrenia, drug addiction
neurotransmitter associated with emotional states, sleep, and sensory perception; associated disorders: depression
neurotransmitter associated with physical arousal, learning, memory, and regulation of sleep; associated disorders: depression, stress
gamma-aminobutyric acid; neurotransmitter associated with the inhibition of brain activity; associated disorders: anxiety disorders
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