Noradrenaline

Ranicide in rats was found to be reduced by injection of noradrenaline into the hypothalamus, as was muricide behaviour (Bandler, 1970).[…]Other sites in the unspecified ‘ventral midbrain’ were also found (Bandler, 1971) at which noradrenaline administration in crystalline form served to facilitate predatory aggression (ranicide and muricide).