Brain dopamine and noradrenaline levels in rats submitted to four different aversive behavioral tests.

摘要: Rats were trained to perform shuttle responses a buzzer in four different situations: Pseudoconditioning (buzzers and footshocks presented at random), classical conditioning footulus paired on every trial), avoidance without stimulus pairing (buzzer-shock intervals varied random, shocks contingent upon the nonemission of response preceding buzzer), standard two-way shocks, but latter omitted time there was buzzer). Animals killed immediately after last trials noradrenaline dopamine content their hypothalamus, amygdala, caudate nucleus, nucleus accumbens determined. There falls levels all structures except pseudoconditioning test. Noradrenaline normal, partially recovered, animals submitted other training situations. Thus learning factors (stimulus and/or contingency) offset depleting influence per se both catecholamines least studied.