PSY100H1 Lecture Notes - Lecture 13: Walter Bradford Cannon, Lateral Hypothalamus, Leptin
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PSY100H1 Full Course Notes
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Document Summary
Both share ability to arouse an organism and stimulate behavior. E. g. when you are hungry you seek food; but when you are afraid, you might do any number of things. To achieve homeostasis, organisms actively defend certain values known as set points (e. g. body temperature, fluid levels and weight regulated around set points) Drives: psychological state (e. g. hunger) encouraging behaviours (e. g. Drives: psychological state (e. g. hunger) encouraging behaviours (e. g. eating) that satisfy needs (e. g. food) Once equilibrium is reached, we experience drive reduction: state of relief and reward produced by removing tension and arousal of drive sate. Incentives: external stimuli (as opposed to internal drives) that motivate behaviors. E. g. the food tastes good, so we eat though we are not hungry. Intrinsic reward: reward that arises internally (feeling of accomplishment) Extrinsic reward: reward from an outside source (money or praise) Caused by hunger contractions (proven by walter cannon) By low level of circulating sugars (particularly glucose)
