PSYC 2012 Lecture Notes - Lecture 31: Tegmentum, Ghrelin, Nucleus Accumbens
Document Summary
Social influences - people consume 60% more when eating with others but can decrease consumption too so as not to appear gluttonous. (cid:862)cafeteria effect(cid:863) - eating one food decreases that desire for that food but having other foods available will cause you to continue eating because your desire for them has not been reduced as much. (cid:862)appetizer effect(cid:863) - eating a small amount of food first often increases hunger. Cultural norms - ho(cid:449) lo(cid:374)g our (cid:373)eals are, eati(cid:374)g u(cid:374)til (cid:449)e"re (cid:374)ot hu(cid:374)gr(cid:455) or u(cid:374)til (cid:449)e"re full. External/visual cues - plate/portion size, supersizing, economy size, etc. Stress or anxiety or other emotional states. 4 brain regions that influence eating behaviors. Amygdala - regulates emotions; provides input about food aversions, emotional states, stress, etc. Hippocampus & medial temporal lobe - memory storage; provides input about how recently we ate, how filling it was, how nutritious and good tasting it was, and learned cravings, etc.
