期刊
PHYSIOLOGY & BEHAVIOR
卷 82, 期 1, 页码 89-95出版社
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.physbeh.2004.04.045
关键词
flavor conditioning; sham feeding; nutrient infusions
资金
- NIDDK NIH HHS [DK-31135] Funding Source: Medline
The postingestive satiating action of food is often viewed as producing a positive affective state that rewards eating. However, in an early test of this idea, Van Vort and Smith [Physiol. Behav. 30 (1983) 279] reported that rats did not learn to prefer a food that was real-fed and satiating over a food that was sham-fed and not satialing. Subsequent investigators obtained similar findings with concentrated nutrient sources. With dilute nutrient sources, however, rats learned to prefer the real-fed to the sham-fed food. These and other findings demonstrate that nutrients have rewarding postingestive effects that enhance food preferences via a conditioning process. These reward effects appear separate from the satiating actions of nutrients, which may actually reduce food reward. Food intake and preference are controlled by a complex interaction of positive and negative signals generated by nutrients in the mouth and at postingestive sites. (C) 2004 Elsevier Inc. All rights reserved.
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