ED lecture march 5th

Overview of Anorexia Nervosa

  • Definition: Anorexia nervosa is characterized by restriction of energy intake, leading to significantly low body weight relative to age, sex, and growth trajectory.

    • DSM-5 Update: Transition from DSM-IV's focus on food to energy intake, acknowledging behaviors like juicing, shakes, and protein supplements.

Diagnostic Criteria for Anorexia Nervosa

  • Criterion A: Restriction of energy intake resulting in a significantly low body weight.

  • Criterion B: Intense fear of gaining weight or becoming fat, evidenced by behaviors interfering with weight maintenance.

  • Criterion C: Disturbance in self-perception of body weight or shape, leading to undue influence of weight on self-evaluation, or persistent denial of the low weight condition.

Subtypes of Anorexia Nervosa

  • Restricting subtype: Weight loss achieved primarily through caloric restriction, dieting, fasting, or excessive exercise.

  • Binge-eating/purging subtype: Involves episodes of binge eating followed by purging methods such as vomiting, laxatives, or diuretics.

    • Common misconception of being confused with bulimia nervosa.

    • Typical binge calorie content is around 1,900 calories.

Differences Between Anorexia and Bulimia

  • Individuals with bulimia usually maintain a normal weight, while those with anorexia are significantly underweight.

  • Anorexia's binge-eating/purging subtype engages in purging more than binging.

Models of Anorexia

  • Diathesis-Stress Model: Risk factors that may elevate susceptibility to anorexia include:

    • High levels of anxiety and obsessive traits, possibly leading to restrictive eating behaviors.

    • Body image disturbances, related to both psychological and sociocultural factors.

Pathways to Anorexia

  • Cultural Factors: Influence of media, fashion industry, and social expectations regarding body image.

    • Increased emphasis on thinness in both women and men, as illustrated by male modeling standards. E.g., male model's height of 6'3" and weight under 130 lbs.

  • Perfectionism: Internal standards for weight loss and eating can lead to compensatory behaviors when perceived goals are not met.

Sports and Eating Disorders

  • Certain sports have a higher prevalence of eating disorders due to various factors:

    • Sports involving tight clothing (e.g., gymnastics, wrestling, boxing).

    • The pressure of performance and weight standards leads to prevalence in athletes.

Long-Term Outcomes of Anorexia

  • Recovery statistics indicate that about 50% of individuals may fully recover after 10 years; however:

    • 10% of individuals will continue to meet criteria for anorexia after a decade.

    • Dangers include heart failure due to malnourishment impacting cardiovascular health.

Treatment Challenges

  • Treatment Resistance: Anorexia is often harder to treat than other mental health disorders due to:

    • Lack of FDA-approved medications specific for anorexia.

    • Individuals commonly reject treatment options that involve medication due to calorie content concerns.

  • Crisis Management: Hospitalization may be required under severe conditions, such as:

    • Heart rate below 50 bpm, severe hypotension, failure to respond to outpatient treatment.

Understanding Bulimia Nervosa

  • Diagnostic Criteria:

    • Recurrent episodes of binge eating accompanied by compensatory behaviors (vomiting, misuse of laxatives).

    • Occurs at least once a week for three months. Individuals typically have a normal weight range.

Cycle of Bulimia

  • Begins with strict dieting, leading to hunger and tension, resulting in binging, then purging, followed by shame, reverting back to stricter dieting.

Overview of Binge Eating Disorder

  • Introduction in DSM-5: Characterized by frequent binge eating without compensatory behaviors, leading to obesity.

    • Typical binge size remains consistent with bulimia at around 1,900 calories.

Prevalence of Eating Disorders

  • Binge Eating Disorder: 6-8% among those who are obese.

  • Bulimia: Affects approximately 1.5% of women, 0.5% of men.

  • Anorexia: Affects 0.9% of women, 0.3% of men.

Societal Trends and Influences

  • Anorexia and bulimia are more prevalent among women compared to men due to societal pressures on body image.

    • Shift in masculinity and pressure for men to conform to body ideals as observed in male modeling trends.

  • Eating disorders are now recognized as a global issue, with rising numbers in various demographics and cultures.

Biological and Psychological Factors

  • Biological: Low serotonin levels observed in eating disorders; co-occurring depression is more common in bulimia than anorexia.

  • Cognitive: Focus on body image distortion and disinhibition related to impulsivity.

  • Social influences: Family reinforcement for weight loss can lead to sustained disordered eating patterns.

Treatment Options

  • Treatment approaches vary between disorders:

    • Anorexia: Family therapy, cognitive behavioral therapy to address rigid dichotomies.

    • Bulimia: Focus on addressing binge-purge cycles and impulsivity through behavioral therapies.

    • FDA-approved medications for binge eating disorder include appetite suppressants like Vyvanse.

Ethical Dilemmas in Treatment

  • Discussion of pro-ana movements on social media raises concerns about promoting harmful behavior versus freedom of speech.

    • This creates a complicated landscape for treatment advocacy and societal responsibility.

Conclusion

  • Ongoing need for awareness and sensitive treatment strategies for individuals affected by eating disorders to address their complex needs and the societal pressures that contribute to these disorders.