Columbia subject headings:
Neurophysiology--Congresses.
Parasympathomimetic agents--Congresses.
Sympathomimetic agents--Congresses.
Harvard subject headings:
Acetylcholine--Receptors--Congresses.
Adrenaline--Receptors--Congresses.
Neurotransmitters--Congresses.
Princeton subject headings:
Neurophysiology--Congresses.
Parasympathomimetic agents--Congresses.
Sympathomimetic agents--Congresses.