Sympatho-adrenal system activation by administration of corticoliberin in the dog caudate nucleus.

Corticotrophin releasing factor injection into the head of the caudate nucleus of dogs was followed by a more than threefold increase of blood plasma adrenaline and noradrenaline levels as soon as in 30 min and by their reduction by the 60th min after the injection though not to the initial values. These changes are compatible to stressor reaction and are associated with an increased orientation research reaction in animals. Injections of 6-hydroxydopamine into caudate nucleus drastically exhausted dopamine content in this structure. Subsequent injections of corticotrophin releasing factor into caudate nucleus virtually did not change blood plasma catecholamine content, this indicating the participation of the strionigral complex dopaminergic structures in realization of corticotrophin releasing factor effect on the sympathoadrenal system.