in order to investigate the mode of action of biogenic amines in rat cerebral cortex , the unitary activity of spontaneously firing neurons and their excitatory response to acetylcholine ( ach ) were examined using microiontophoretic administration of dopamine ( da ) , noradrenaline ( na ) and serotonin ( 5-ht ) .
C0005496
biogenic amines
C0001041
acetylcholine