Disruption of serotonin levels leads to increased anxiety = trigger AN
Bailer - high levels of serotonin in women with AN.
highest levels in those with the most anxiety.
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AO1 2 - Dopamine
increased dopamine in the basal ganglia alters the way people interpret rewards.
individuals with AN find it difficult to associate good feelings with things that are usually pleasurable.
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AO1 3 - Pregnancy and birth complications
Inadequate nutrition during pregnancy among mothers with an eating disorder may act as a diathesis for the development of AN in the child.
Lindberg and Hjern - significant association between birth complications and the development of AN.
Birth complications such as lack of oxygen may cause brain damage = impair neurodevelopment
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AO1 4 - Adapted to flee
symptoms of AN reflect evolved adaption in response to local famine conditions.
Increasing desire for food must be 'turned off' to increase their chances of survival by moving to a more favourable environment.
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AO2 1 - SSRIs
ineffective when used with AN patients
However, some studies report that SSRIs may help to elevate mood and reduce some of the obsessive symptoms of anorexia.
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AO2 2 - dopamine support
Castro Fornieles - adolescent girls with AN had higher levels of HVA.
However, Wang found that obese individuals had lower than normal levels of dopamine - suggesting an inverse relationship between levels of dopamine and body weight.
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AO2 3 - Complications support
Favaro - the perinatal complications associated with risk of developing AN were: obstructed blood supply in the placenta, early eating difficulties and low birth weight.
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AO2 4 - Parental feelings of guilt
biological explanations reduce parental feelings of guilt.
People realise they are dealing with treatable dysfuntional biology, rather than a dysfunctional family.
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AO2 5 - IDA
Biological explanations offer the possibility for treatments involving bringing neurotransmitter levels into balance.
Bilogical causes can help with insurance payouts
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AO2 6 - Evolutionary limitations
AN decreases fertility and makes reproduction more difficult
Evolutionary explanations do not fully explain how AN would have been passed down through natural selection.
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