local infusion of diazepam ( 15 micrograms ) of flurazepam ( 1.5 micrograms ) into the hippocampus of conscious rats ( via indwelling cannulae ) markedly reduced 5-ht synthesis in this brain area whereas infusion of these drugs into the raphe medianus ( origin of the serotonergic afferents to the hippocampus ) failed to affect hippocampal 5-ht synthesis .
C0234421
conscious
C0006104
brain