PSY100H1 Chapter Notes - Chapter 11: Eating Disorder, Sports Drink, Bulimia Nervosa
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PSY100H1 Full Course Notes
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Hunger is a biological drive that influences what we pay attention to and interacts with past experience/current mental states (like excitement or anxiety) = a physiological behavior. Motivation concerns the physiological and psychological processes underlying the initiation of behaviours that direct organisms towards specific goals. Allostasis motivation is not only influenced by current needs but also by the anticipation of future needs. On/off switch for hunger is in the hypothalamus: on lateral side, off dorsal/medial side drive= thirsty behavior= drink fluids to reduce drive incentive= sweetened sports drink behavior= drink fluids to experience incentive. But after they were given a few pieces of it the activity in the reward systems decreased and was replaced by activity in other areas in the frontal lobes. Ghrelin hormone secreted in the stomach that stimulates stomach contractions and appetite. Obesity disorder of positive energy balance, in which energy intake exceeds energy expenditure.
