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Main structure of brain associated with eating behavior
- Lateral Hypothalamus
- Ventromedial Hypothalamus
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Lateral Hypothalamus
- stimulation leads to hunger
- lesioning leads to self starvation
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Ventromedial Hypothalamus
- lesioning leads to hunger
- stimulation causes animal to stop eating
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How is weight currently measured
Body Mass Index: dividing body weight by the square of a person's height
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How does setpoint model explain obesity
weight is regulated around a 'setpoint' (internal thermostat)
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How does positive incentive model explain obesity
- positive reinforcement of eating has important consequences for weight maintenance
- people have several types of motivation to eat, including personal pleasure and social context
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Biological factors on people diagnosed with anorexia, bulimia, and/or binge eating disorders
- Hypothalamic pituitary adrenal Axis (HPA): HPA abnormalities that may promote depression are linked with both anorexia and bulimia
- Abnormal endorphin levels: opiate antagonists used to reduce binge-purge episodes
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Psychological factors that influence families with anorexics
- high achieving
- competitive
- overprotective
- intense interactions
- poor conflict resolution
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Psychological factors that influence families of bulimia
- above average incidence of alcoholism, substance abuse, obesity, and depression
- less accepted by their parents who are seen as critical and neglectful
- childhood experience with sexual/physical abuse and post-traumatic stres
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Social factors on people diagnosed with anorexia, bulimia, and/or binge eating disorders
dieting/disorder eating viewed as responses to social roles/cultural ideals
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Anorexia health consequences
- slowed thyroid function
- heart arrhythmias
- low blood pressure
- dry/yellowed skin
- anemia
- fragile bones
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Bulimia health consequences
- hypoglycemia
- poor nutrition
- periodontal issues
- damage to mouth
- anemia
- electrolyte imbalance
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