PSY100H1 Chapter Notes - Chapter 15: Binge Eating Disorder, Binge Eating, Bulimia Nervosa

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9 Feb 2013
Chapter 15
Eating disorders: traditionally more prevalent in women though recent emphasis
on men having a superfit look; driving force to be more attractive, increase self-
esteem, lose weight; almost half of grade 10 girls indicating they were on a diet or
needed to lose weight; problems can start in elementary school; men more likely
to have histories of being overweight or bingeing before disorders develop
Anorexia nervosa: pursuit of thinness that leads people to starve themselves; can
develop elaborate rituals around food
oRestricting type: people simply refuse to eat as a way of preventing
weight gain; attempt to go for days without eating anything; eat very small
amounts of food each day; more likely to mistrust others and deny they
have a problem
oBinge/purge type: people periodically engage in bingeing or purging
behaviours; do not eat large amounts of food in binge; different from
bulimia in that people with AN continue to be at least 15% below a
healthy body weight and develop amenorrhea; more likely to have
problems with unstable moods, impulse control, self-mutilation, alcohol
Diagnosis: person refuses to maintain a body weight that is healthy and normal
for their age/height; weight must be 15% below minimum healthy weight; intense
fears of becoming fat; distorted images of their bodies; self-evaluations hinge on
weight and control over eating; causes chronic fatigue but are still driven to
exercise excessively
oAmenorrhea: weight loss in women and girls that causes them to stop
having menstrual periods; absence of three consecutive menstrual cycles
required for diagnosis
Prevalence: 1% of people will develop anorexia at sometime in their lives;
between 90-95% of people diagnosed are female; white women more likely;
usually begins in adolescence; half the women who develop this recover fully 10
years after treatment but remainder continue to suffer for eating related or other
Prognosis: physiologically deadly; death rate between 5-8%; high suicide rates;
cardiovascular complications (brachycardia, arrhythmia and heart failure); bone
strength (low estrogen levels); kidney damage and impaired immune functioning
Bulimia nervosa: cycle of bingeing (uncontrolled eating) follow by extreme
behaviours to prevent weight gain; sense of lack of control over eating during
binge; binge eating and purging occur on average at least twice a week for three
months; self-evaluation unduly influence by body shape and size; do not show
gross distortions in body images like people with AN; no weight criteria for BN
oBinge: occurring in a discrete period of time (ex: hour or two) and
involving eating an amount of food that is definitely larger than most
people would eat during a similar period of time in similar circumstances;
tremendous variation
oPurges: inappropriate behaviours to prevent weight gain, like self-induced
vomiting, misuse of laxatives, diuretics, enemas or other meds, fasting or
excessive exercise
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