Psychology 2310A/B Lecture Notes - Dieting

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Eating Disorders: Bulimia Nervosa
Bulimia Nervosa (DSM-IV)
Recurrent episodes of binge eating
oIn a discrete period of time, eating an amount of food that is definitely
greater than most people would eat during a similar time period
oA sense of lack of control over eating during the episode
Recurrent inappropriate compensatory behaviour to prevent weight gain (eg,
vomiting, laxatives, fasting, excessive exercise)
oKey word is inappropriate because there is a natural behaviour to prevent
weight gain that everyone has, not extreme
Binge eating and compensatory behavior occur, on average, at least twice a week
for 3 months
Self-esteem unduly influenced by body shape and weight
Subtypes: (a) Purging; (b) Non-purging
Triggers of Binges
Stress and Emotional Distress
Dieting
Forbidden Foods all or nothing thinking
Alcohol
Social Isolation
Associated Features
Typically within normal weight range
Depression, anxiety symptoms
Low self-esteem
Substance abuse – alcohol, stimulants
Personality disorders (esp. Borderline)
Medical problems
oFluid and electrolyte abnormalities
oDental problems, enlarged salivary glands
oCardiac arrhythmia
oStomach pain
Age, Gender, Culture
Much more common in industrialized countries
90% female
Usually begins in late adolescence, early adulthood
Prevalence
1-3 % of adolescent, young adult women
Up to 20% of university women have some degree of eating disturbance
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