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Acetylcholine
neuromuscular junctions, synapse at vagus nerve/cardiac muscle fibers, ganglia of visceral motor system, and sites in CNS
muscarinic AChR
corpus striatum and hippocampus
Glutamate
half of all brain synapses
GABA
1/3 of synapses in the brain
Glycine
½ of synapses in spinal cord
Dopamine
corpus striatum and substantia nigra
Dopamine receptors
medulla
norepinephrine
locus coeruleus and projects diffusely to a variety of forebrain targets
epinephrine
medulla and lateral tagmentum where it projects in thalamus and hypothalamus
Histamine
hypothalamus that sends out projections to almost all regions of the brain and spinal cord
Serotonin
groups of neurons in the raphe regions of the pons and upper brainstem and has projections into the forebrain
ATP/Adenosine
motor neurons on spinal cord and ganglia of sensory and autonomic system. Also some parts of brain