PSY 395 Ch 8 - Chapter 8 Eating Disorders o Major types of...

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Chapter 8 Eating Disorders o Major types of eating disorders Bulimia nervosa and anorexia nervosa Disruptions in eating behavior Fear of gaining weight Sociocultural origins Westerbuzed views Increasing rates Possibly leveling off Prevalence is increasing in the western world, where problems appear to be culture specific o Obesity 65% of US adults overweight 30% obese rates are increasing BMI vs. weight Health risks o Two different types 1. Anorexia Nervosa Eating is restricted to minimal amounts of food 2. Bulimia Nervosa Out of controlling eating or binging followed by self – induced vomiting, excessive laxative use, or other attempts to purge Bulimia Nervosa Binge Eating Excessive amounts of food Perceived as ‘out of control’ Most prevalent psychological disorder on college campuses Compensatory behaviors Purging Excessive exercise Fasting Belief that popularity and self-esteem are determined by weight and body shape A binge is a larger amount of food than most people would eat and under the circumstances Uncontrollability Compensatory behaviors: people with bulimia attempt to compensate for binge eating and potential weight gain by purging o Clinical Description Subtypes
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1. Purging (most common) Infective method to reduce weight intake 2. Nonpurging (6-8%) Most are within 10% of normal weight Fasting after binge exercise Medical Consequences Electrolyte imbalance – can lead to fatal cardiac arrhythmia and renal failure (death, heart attack) Anorexia Nervosa o Clinical Description “Overly successful” weight loss 15% below expected weight Average is 25-30% below expected weight by the time they seek treatment Intense fears Gaining weight Losing control of eating Relentless pursuit of thinness Often begins with dieting o Subtypes Restricting Individual diet to limit calorie intake via diet and fasting
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