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Using the Activity-based Anorexia Rodent Model to Study the Neurobiological Basis of Anorexia Nervosa
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Eating Behavior and the Evolutionary Perspective on Anorexia Nervosa.

P Södersten1, U Brodin1, M Zandian1

  • 1Karolinska Institutet, Mandometer Clinic, Huddinge, Sweden.

Frontiers in Neuroscience
|June 29, 2019
PubMed
Summary
This summary is machine-generated.

Anorexia nervosa treatment focusing on eating behavior, not cognitive processes, shows higher remission rates (75%) and fewer relapses compared to standard cognitive behavioral therapy (CBT). This approach emphasizes behavioral adaptation over mental illness paradigms.

Keywords:
anorexiabrainstemeatingevolutionhypothalamusmathematical modelsprefrontal cortextreatment

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Area of Science:

  • Neuroscience
  • Psychiatry
  • Evolutionary Biology

Background:

  • Standard anorexia nervosa treatment (CBT) has limited success (≤25% remission).
  • Current treatments focus on cognitive processes, not the underlying eating behavior.
  • Anorexia nervosa is viewed as a neurochemical mental illness, lacking effective treatments.

Purpose of the Study:

  • To investigate an evolutionary perspective on eating disorders, focusing on foraging and eating behavior.
  • To evaluate a novel treatment approach centered on practicing eating behavior.
  • To compare remission and relapse rates between behavioral and cognitive treatments.

Main Methods:

  • Utilized a neural network model of feeding behavior.
  • Implemented a clinical treatment involving machine-guided eating behavior feedback.
  • Modeled eating behavior using a two-parameter asymptotic exponential growth curve in healthy and anorexic women.

Main Results:

  • Eating disorder patients recovered through practicing eating showed a 75% remission rate within 1 year.
  • Relapse rates were low (10% over 5 years) with no reported deaths.
  • Anorexic women's eating behavior did not fit the growth curve model, but normalized during remission.

Conclusions:

  • Treatment of eating disorders should prioritize direct intervention in eating behavior.
  • An evolutionary, behavior-focused approach offers superior outcomes to standard CBT.
  • Practicing eating behavior is a safe and effective treatment for anorexia nervosa.