A non-reinforced taste stimulus with aversive properties was found to increase the level of excretion of adrenaline, noradrenaline and dopamine, thus reflecting occurring anxiety. The dopamine increase seems to be due to unspecific reasons of the experimental procedure. Catecholamines increase more in males rather than in females. The conditioned taste aversion seems to be preserved for a longer period of time in activating of the sympathetic-adrenal system.
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