Letter: Significance of plasma copper and caeruloplasmin concentrations in rheumatoid arthritis

Experiments were conducted on rats. It was shown that sodium oxybutyrate depressed the escape response to punishment of the partner and motivated aggression in much lower doses than the defence conditioned reflex and unmotivated aggression, prevented negative consequences of fear and rage reactions; it also normalized conditioned reflexes in neurotic rats, this pointing to its marked tranquillizing action.