Incentive relativity effects reduced by exogenous insulin.
In two experiments rats shifted from 32% to 4% sucrose consumed less of the 4% than rats maintained on the 4% solution. This negative contrast effect was eliminated if the rats were injected with insulin (5.4 U/kg) on the shift day. This insulin dose reduced blood glucose levels to less than 50% of control levels, but the brief access period to 4% sucrose just before blood sampling reliably increased blood glucose levels. The results were discussed in terms of the effects of deprivation conditions on incentive relativity.
D000818:Animals; D001786:Blood Glucose / Q000032:analysis; D005247:Feeding Behavior / Q000187:drug effects*; D005508:Food Deprivation; D006815:Hunger / Q000187:drug effects*; D007328:Insulin / Q000494:pharmacology*; D008297:Male; D051381:Rats; D011919:Rats, Inbred Strains; D013395:Sucrose
D001786:Blood Glucose; D007328:Insulin; D013395:Sucrose