Activation level and the production of gastric ulceration in the rat.
D000818:Animals; D002540:Cerebral Cortex / Q000502:physiology*; D007103:Immobilization; D008027:Light; D008297:Male; D009043:Motor Activity; D010437:Peptic Ulcer / Q000209:etiology*; D011603:Psychophysiology; D051381:Rats; D012154:Reticular Formation / Q000502:physiology*