Chapter 8a Outline

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Abnormal Psychology 30

3/18/09 Chapter 8 - Eating and Sleep Disorders

Eating Disorders: An Overview



Central characteristic is an overwhelming, all-encompassing drive to be thin.



Marked by severe disruptions in eating behavior



Strong sociocultural origins - Westernized views 



Two Major Types of DSM-IV-TR Eating Disorders 



Anorexia nervosa and Bulimia nervosa

Other Subtypes of DSM-IV-TR Eating Disorders 



Although rates are increasing in parts of Asia

Binge eating disorder

A Growing Epidemic 

Obesity

Bulimia Nervosa: Defining Features



DSM-IV-TR Subtypes of Bulimia 



Purging subtype – Most common subtype

Non-purging subtype – Rare; 6-8% of bulimics



No differences between subtypes in severity of psychopathology, frequency of binge episodes, or prevalence of

major depression and panic disorder.





Binge Eating is the Hallmark of Bulimia 

Binge - Eating excess amounts of food



Eating is perceived as uncontrollable

Compensatory Behaviors 

Purging - Self-induced vomiting, diuretics, laxatives



Some exercise excessively, whereas others fast 

Is actually not a good way to lose weight

Bulimia Nervosa: Associated Features 

Most are within 10% of target body weight



Associated Medical Problems 

Erosion of dental enamel, electrolyte imbalance



Kidney failure, cardiac arrhythmia, seizures, intestinal problems, permanent colon damage

Bulimia Nervosa: Associated Features

Maduramente

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Abnormal Psychology 30  Associated Psychological Features





Most are over concerned with body shape



Fear of gaining weight

3/18/09

Comorbid psychological disorders 

Anxiety, mood disorders, and substance abuse.

Anorexia Nervosa: Defining Features



DSM-IV-TR Subtypes of Anorexia 

Restricting subtype – Limit caloric intake via diet and fasting



Binge-eating-purging subtype – About 50% of anorexics 





Unlike bulimics, binges involve small amounts of food and the purges occur more consistently

Few differences exist on severity of symptoms or personality

Successful Weight Loss is the Hallmark of Anorexia 

Defined as 15% below expected weight, typically 25-30%



Intense fear of obesity and losing control over eating



Anorexics show a relentless pursuit of thinness



Often begins with dieting, especially adolescents who are actually overweight or otherwise perceive themselves

to be overweight Anorexia Nervosa: Associated Features





Associated Medical Features 

Marked disturbances in body image



Rarely seek treatment on their own



Medical consequences 

Amenorrhea, Lanugo



Dry skin, brittle hair or nails, sensitivity and intolerance for cold temperatures.

Comorbid psychological disorders 

Anxiety and mood disorders, particularly obsessive-compulsive disorder.

Binge-Eating Disorder: Overview



Binge-Eating Disorder – Appendix of DSM-IV-TR 

Experimental diagnostic category



Engage in food binges without compensatory behaviors

Binge-Eating Disorder: Associated Features



Many are obese

 Concerns about shape and weight Maduramente

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Abnormal Psychology 30  Often older than bulimics and anorexics 

3/18/09

More psychopathology vs. non-binging obese people

Bulimia and Anorexia: Facts and Statistics



Both Bulimia and Anorexia Are Found in Westernized Cultures



Most cases of severe eating disorders are found in young, affluent, white females in competitive environments

Bulimia and Anorexia: Facts and Statistics





Bulimia 

Onset around 16 to 19 years of age



Lifetime prevalence is about 1.1% for females, 0.1% for males



6-8% of college women suffer from bulimia



Chronic if left untreated

Anorexia 

Majority are white in middle-to-upper middle class



Usually develops around age 13 or early adolescence



More chronic and resistant to treatment than bulimia

Causes of Bulimia and Anorexia: Toward an Integrative Model Media and Cultural Considerations 

Being thin = Success, happiness....really?



Cultural imperative for thinness 

Translates into dieting



Standards of ideal body size changes like fashion



Media standards of the ideal are difficult to achieve

Causes of Bulimia and Anorexia: Toward an Integrative Model







Familial Considerations 

Successful, hard driving, concerned with external appearances, and eager to maintain harmony.



Often deny or ignore conflicts and have communication problems.

Biological Considerations 

Low 5HT in hypothalamus



Inherited emotional instability and poor impulse control

Psychological and Behavioral Considerations

Maduramente

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Abnormal Psychology 30 

Low sense of personal control and self-confidence



Perfectionistic attitudes



Distorted body image



Preoccupation with food



Mood intolerance

3/18/09

Medical and Psychological Treatment of Bulimia Nervosa



Medical and Drug Treatments 

Antidepressants 



Can help reduce binging and purging behavior but not long-term

Psychosocial Treatments 

Cognitive - behavior therapy (CBT) 



Treatment of choice

Interpersonal psychotherapy 

Long-term gains similar to CBT

Goals of Psychological Treatment of Anorexia Nervosa



General Goals and Strategies 

Weight restoration 

First and easiest goal to achieve



Psychoeducation



Behavioral and cognitive interventions 

Target food, weight, body image, thought and emotion



Treatment often involves the family



Anorexia has poorer prognosis than for bulimia

Medical and Psychological Treatment of Binge Eating Disorder



Medical Treatment 



Sibutramine (Meridia)

Psychological Treatment 

CBT 

Similar to that used for bulimia



Interpersonal psychotherapy



Self-help techniques

Maduramente

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Abnormal Psychology 30

3/18/09

Obesity: Overview



Not a formal DSM disorder



Statistics 

In 2000, 20% of adults in the United States were obese



Mortality rates are close to those associated with smoking



Increasing more rapidly in teens and young children



Growing rapidly in developing nations

Obesity and Disordered Eating Patterns







Obesity and Night Eating Syndrome 

Occurs in 7-15% of treatment seekers



Occurs in 27% of individuals seeking bariatric surgery



Patients are wide awake and do not binge eat

Causes 

Obesity is related to technological advancement



Genetics account for about 30% of obesity cases



Biological and psychosocial factors

Treatment 

Greater success with children and adolescents

Obesity Treatment Progression: From least to most intrusive options



1st step - Self-directed weight loss programs



2nd step - Commercial self-help programs



3rd step - Behavior modification programs



Last step - Bariatric surgery

Review of Eating Disorders



Two Major Types of DSM-IV-TR Eating Disorders 

Anorexia nervosa and Bulimia nervosa 



Other Subtypes of DSM-IV-TR Eating Disorders 



Major difference is whether weight loss is successful

Binge eating disorder

All Eating Disorders Share 

Gross deviations in eating behavior



Fear or concern about weight, body size, appearance



Heavily influenced by social, cultural, and psychological factors

Maduramente

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