“In terms of the hypothalamic concentration of dopamine, noradrenaline, adrenaline … h on pro-oestrus, the only common effect of diethyldithiocarbamate and SKF 64139, given in a …, was a severe depletion of adrenaline ; alpha-methyl-p-tyrosine failed to produce this effect … of dopamine and a moderate loss of noradrenaline.”