PSY100H1 Lecture Notes - Walter Mischel, Motivation, Polyphagia
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PSY100H1 Full Course Notes
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Document Summary
Drives (e. g. , hunger) are psychological states that encourage behaviours (e. g. , eating) that satisfy needs (e. g. , food: encourage behaviour by increasing arousal. It is not only our internal drives that guide our behaviour. Incentives: external stimuli (as opposed to internal drives) that motivate behaviours: e. g. , the food tastes good, so we eat it though we are not hungry. What: determined by cultural beliefs, personal experience, and religion. When: when it"s mealtime, when you"re hungry, when there"s food. Why: feeding centre eat, you"re hungry , satiety centre stop, you"re full , hypothalmus. Damage to the ventromedial causes hyperphagia (getting fat) Damage to the lateral region causes aphagia (getting too thin: there are numerous theories regarding the internal signals responsible for hunger satiation. Leptin is a hormone released from fat which travels to the hypothalamus and inhibits eating behaviour. Grelin is a hormone from the stomach that surges before eating and decreases after eating. Glucostatic theory glucose levels in the bloodstream.
