EN
The effect of cholecystokinine terminal octapeptide’s sulphuric salt (CCK-8S) on the action potentials of forestomachs and abomasum in sheep was investigated in the present study. Intraventricular cannula and electrodes on forestomachs and abomasum were implanted under general anaesthesia. Animals underwent 12 h fasts prior to the experiment. CCK-8S was administered into the lateral cerebral ventricle. Action potentials of forestomachs and food intake were significantly inhibited after a 1 min infusion of 1.64 and 2.05 µg CCK-8S. The inhibition was dose - dependent and lasted for 3-5 h after CCK-8S administration. The inhibitory effect of CCK-8S on action potentials of forestomachs and food intake was abolished by prior administration (10 min) of L-364,718 (devazepide, CCK-A specific receptor antagonist). The action of CCK-8S is the effect of the specific stimulation of peripheral CCK-A receptors present in cerebral structures. These receptors are responsible for the sensation of hunger and satiety and the integration of activity of gastric centres in the brain influencing functional electrical activity of forestomachs and abomasum in sheep.