Appetite Week 12

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Questions and Answers

Which eating disorder is characterized by repeated overeating without compensation?

Night eating disorder

Bulimia nervosa

Binge eating disorder (correct)

Anorexia nervosa

Which eating disorder is linked to abnormal circadian rhythm and leptin dysfunction?

Anorexia nervosa

Night eating disorder (correct)

Binge eating disorder

Bulimia nervosa

Which eating disorder involves repeated regurgitation and re-chewing of food, more commonly observed in children?

Avoidant/Restrictive food intake disorder

Pica

Binge eating disorder

Rumination disorder (correct)

Which eating disorder is characterized by avoidance or restriction of food intake, similar to anorexia but without fear of weight gain or body distortions?

Avoidant/Restrictive food intake disorder Signup and view all the answers

What is the lifetime prevalence of Anorexia Nervosa (AN)?

0.5-2% Signup and view all the answers

What are the medical consequences of AN?

Overactivity, endocrine abnormalities, and high mortality Signup and view all the answers

Which factor plays a significant role in AN, with a higher concordance in MZ twins?

Genetic factors Signup and view all the answers

What is the lifetime mortality rate of AN?

5-10% Signup and view all the answers

What is a documented consequence of AN?

Osteoporosis, anxiety, and depression Signup and view all the answers

What is the cause of AN?

Multifactorial, involving genetic, biological, psychological, social, and cultural factors Signup and view all the answers

What is AN associated with in terms of heritable traits?

Abnormal serotonin metabolism, perfectionism, and chronic anxiety Signup and view all the answers

What may contribute to the onset of AN?

Developmental factors, such as obstetric difficulty and parental anxiety Signup and view all the answers

What did doctors find in a man's stomach, related to AN?

A mass of coins worth $650 Signup and view all the answers

When did AN start being documented?

15th century Signup and view all the answers

What is the weight of the mass of coins found in the man's stomach?

More than 5 Kg Signup and view all the answers

What is the gender primarily affected by AN?

Women Signup and view all the answers

What is the role of the HPA axis in Anorexia Nervosa (AN)?

Regulation of stress response Signup and view all the answers

What is a significant consequence of stress activation in AN?

Raised blood glucose Signup and view all the answers

What is the first goal of treatment for AN?

Refeeding Signup and view all the answers

What is the role of the hypothalamus in AN?

Involvement in central appetite regulation Signup and view all the answers

What are predisposing individual factors for AN?

Abnormal HPA axis Signup and view all the answers

What are factors that maintain AN?

Complex rituals around body weight measures Signup and view all the answers

What is a consequence of AN development?

Complex rituals around body weight measures Signup and view all the answers

What is the outcome of AN?

5-10% lifetime mortality rate Signup and view all the answers

What is the role of CRH from the PVN in AN?

Significantly affects appetite regulation Signup and view all the answers

What are the biological factors that maintain AN?

Physical addiction to weight loss process Signup and view all the answers

What is the average daily calorie intake during refeeding for AN?

2000-4000Kcal/day Signup and view all the answers

What is the incidence of abnormal attachment styles in parents of children with AN?

Higher Signup and view all the answers

What is the lifetime prevalence of BN in women?

1-3% Signup and view all the answers

At what age does BN typically develop?

Late adolescence or early adulthood Signup and view all the answers

What are some medical consequences of BN?

Dental erosion, swelling of parotid glands, electrolyte abnormalities Signup and view all the answers

What are some predisposing factors for BN?

History of anorexia nervosa, childhood obesity, parental obesity Signup and view all the answers

What may instigate the development of BN?

Dieting, preoccupation with weight, discovery of quick weight loss methods Signup and view all the answers

What physiological changes are related to abnormal satiety in BN?

Enlarged gastric capacity, delayed gastric emptying, reduced gastric elasticity Signup and view all the answers

What is the prognosis of BN?

50% make a full recovery, 30% experience occasional relapse, 20% exhibit chronic BN Signup and view all the answers

What is the usual treatment for BN?

Combination of cognitive-behavioral therapy (CBT) and antidepressants Signup and view all the answers

Which eating disorder is more amenable to treatment than anorexia nervosa?

BN Signup and view all the answers

What are some additional treatments for BN?

On-going psychotherapy and the use of certain anti-depressants after refeeding Signup and view all the answers

How is BN characterized?

A sense of lack of control during binge eating episodes, and inappropriate compensatory behaviors occur at least once per week for 3 months Signup and view all the answers

Study Notes

Understanding Bulimia Nervosa

Bulimia nervosa (BN) involves recurrent binge eating and inappropriate compensatory behaviors to avoid weight gain.
Lifetime prevalence of BN is 1-3% in women, with a 1:10 male to female ratio. It typically develops in late adolescence or early adulthood.
Medical consequences of BN include dental erosion, swelling of parotid glands, electrolyte abnormalities, and rare complications like esophageal tear or gastric rupture.
Predisposing factors for BN include a history of anorexia nervosa, childhood obesity, parental obesity, history of dieting, critical comments about weight, sexual abuse, anxiety, depression, personality disorders, and impulsivity.
BN may be instigated by dieting, preoccupation with weight, discovery of quick weight loss methods, and the discovery that palatable food may be eaten without consequences.
The development of BN is accompanied by physiological changes related to abnormal satiety, such as enlarged gastric capacity, delayed gastric emptying, reduced gastric elasticity, impaired CCK release, and abnormal serotonergic function.
Prognosis of BN indicates that 50% make a full recovery, 30% experience occasional relapse, and 20% exhibit chronic BN.
Treatment for BN usually involves a combination of cognitive-behavioral therapy (CBT) and antidepressants, which have shown success.
BN is more amenable to treatment than anorexia nervosa, which has one of the highest mortality rates of any psychiatric condition.
BN and anorexia nervosa are the most commonly encountered eating disorders, with complex causation that is not fully understood.
Additional treatments for BN include on-going psychotherapy and the use of certain anti-depressants after refeeding to prevent relapse.
BN is characterized by a sense of lack of control during binge eating episodes, and inappropriate compensatory behaviors occur at least once per week for 3 months.

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Test your knowledge of bulimia nervosa with this quiz. Explore the key features, medical consequences, predisposing factors, physiological changes, prognosis, and treatment options for this eating disorder.