PERSISTENCE OF SHAM FEEDING AFTER INTRAGASTRIC MEALS IN THE RAT - CONCENTRATION-INTAKE RELATIONS

In rats sham fed through esophageal fistulas, responsiveness to sucros e over a range of concentrations was assessed under two conditions: im mediately following a large intragastric (IG) preload of liquid diet, and after 10 h of deprivation with no preload. The preload had no reli able effect on sucrose sham feeding at any sucrose concentration. Ther efore, the insensitivity of sham feeding to IG loads is not confined t o intense or highly palatable oral stimuli, but extends even to minima lly effective ones.