effects of various ( 20 , 40 or 80 mg/kg ; intragastric instillation ) doses of hydergine ( dihydroergotoxine ) were studied on the self-stimulation ( ss ) behavior ( in young and old rats with electrodes implanted in the a10 area ) and also on spontaneous motor activity ( sma ) and stereotypy ( st ) as well as on the concentrations of norepinephrine ( ne ) , dopamine ( da ) , serotonin ( 5-ht ) and gamma-aminobutyric acid ( gaba ) in discrete brain areas , such as caudate nucleus ( cn ) , pons-medulla ( pm ) and diencephalon-midbrain ( dm ) in adult rats .
C0006104
brain
C0007461
caudate nucleus