PS102 Lecture Notes - Lecture 19: Prefrontal Cortex, Emotion Classification, Bulimia Nervosa
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(cid:894)lateral& (cid:448)e(cid:374)tro(cid:373)edial areas= the (cid:271)rai(cid:374)"s o(cid:374)-off centers for eating) Receptors for glucose in liver and hypothalamus (aka glucostatic receptors) The larger rat had its ventromedial hypothalamus destroyed. When fat stores are low, leptin levels are low, and ghrelin and orexins are active: Result: stored fat levels increase and feeding stops. When fat stores are high and leptin levels are high: Lots of glucose -> stori(cid:374)g glu(cid:272)ose= do(cid:374)"t eat. People who live closer to fast food restaurants than to supermarkets are also more likely to be obese. Bod(cid:455) mass i(cid:374)de(cid:454) (cid:894)bmi(cid:895): i(cid:374)di(cid:448)idual"s (cid:449)eight (cid:894)i(cid:374) kg(cid:895) di(cid:448)ided (cid:271)(cid:455) height (cid:894)i(cid:374) (cid:373)eters(cid:895) squared. Ge(cid:374)eti(cid:272) (cid:373)utatio(cid:374) i(cid:374) a protei(cid:374) (cid:272)alled (cid:862)tri(cid:373) 28(cid:863) Our natural preferences for sweet, fatty foods. Human ancestors evolved a strong preference for rare high-fat and high-sugar kinds of foods. Normal levels of body fat are between 22-26% Body weight set point- a weight that individuals typically return to even after dieting or overeating.
