the relationship between the adrenergic system and the lateral hypothalamic self-stimulation ( ss ) behavior was investigated by intraventricular injection ( by the use of the modelled hypodermic needle ) of catecholamines . l-epinephrine ( ep ) , l-norepinephrine ( ne ) facilitated the ss behavior dose-dependently .
C0014563
epinephrine
C0028351
l-norepinephrine