PSYC 1010 Lecture 12: HH:PSYC 1010 - Lecture 12 - Motivation and Emotion (Part 2)
15 Jan 2019
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Walter cannon: stomach contractions cause hunger this idea is now discredited. Brain regulation (now look at neural circuits not anatomical centers) Hypothalamus: seemed to contain the brain"s on and off switch. Ventromedial nucleus hypothalamus (vmh) (lesions = didn"t stop eating) not that simple paraventricular nucleus (pvn) modulation arcuate nucleus (sensitive to incoming signals and satiety signals. ) Glucose and digestive regulation glucostatic theory fluctuations in blood glucose levels are monitored in the brain by glucostats = neurons sensitive to glucose in the surrounding fluid stomach via vagus nerve indicates fullness/stretching & richness of nutrients. Biopsychosocial approach (like sex) hunger depends on complex interactions between neural circuits, neurotransmitter system, digestive processes, and hormonal fluctuations. Ex. biological factors as well as psychological and social factors. Will you have fries with that burger? or would you like to supersize" that order? . Stanley schachter (1971) external cues affect hunger (remember the subliminal popcorn study ).
