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1. Biological Explanations for Anorexia Nervosa 2. What do you expect to learn about? <ul><li>Neural explanations…
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  • 1. Biological Explanations for Anorexia Nervosa
  • 2. What do you expect to learn about? <ul><li>Neural explanations </li></ul><ul><li>Evolutionary </li></ul><ul><li>explanations </li></ul>
  • 3. Neural Explanations <ul><li>Neurodevelopment: </li></ul><ul><li>1.) Pregnancy and birth complications: </li></ul><ul><li>Research: </li></ul><ul><li>Linderberg & Hjem (2003) </li></ul><ul><li>Premature birth & dev. of AN </li></ul><ul><li>HOW…?? </li></ul><ul><li>1.) Hypoxia </li></ul><ul><li>= brain damage </li></ul><ul><li>OR 2.) if mother has eating disorder </li></ul><ul><li>= insufficient nutrition </li></ul>
  • 4. Neural Explanations <ul><li>Season of birth: </li></ul><ul><li>According to Eagles (2001)…. </li></ul>
  • 5. Neurodevelopment: Evaluation Pregnancy and birth complications <ul><li>++ Favaro et al. (2006): LT study </li></ul><ul><li>Perinatal complications associated with onset of AN (including early eating probs and low birth weight) </li></ul><ul><li>-------------- </li></ul>
  • 6. Neurodevelopment Evaluation: Season of birth <ul><li>WHY? </li></ul><ul><li>Infections during pregnancy or even temperature at birth! </li></ul><ul><li>Critical period for brain development = in 2 nd trimester – if this is in Winter…. </li></ul><ul><li>What happens in winter? </li></ul>
  • 7. Season of birth: Evaluation (extended) <ul><li>Eagles (2005) </li></ul><ul><li>Found that the youngest siblings were more prone to dev. AN… </li></ul><ul><li>WHY?? </li></ul>
  • 8. Evolutionary Explanations <ul><li>The reproductive suppression hypothesis </li></ul><ul><li>Surbey (1987): </li></ul><ul><li>Allows a girl to stop becoming pregnant when not ready to (biopsychosocially). </li></ul><ul><li>- Can control timing of reproduction </li></ul>
  • 9. Evolutionary Explanations: Evaluation <ul><li>The reproductive suppression hypothesis </li></ul><ul><li>++ girls develop amenorrhea </li></ul>
  • 10. Synoptic toolkit and broader AO2 <ul><li>- Biological determinism </li></ul><ul><li>- Treatment Implications </li></ul>
  • 11. Task <ul><li>Pg 89: </li></ul><ul><li>1.) Can you…. Q’s 1 & 2 </li></ul>
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