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377628
Biological Explanations for Bulimia Nervosa
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Mapa Mental sobre Biological Explanations for Bulimia Nervosa, criado por henryocallaghan em 21-11-2013.
Mapa Mental por
henryocallaghan
, atualizado more than 1 year ago
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Biological Explanations for Bulimia Nervosa
Serotonin
Depression and BM occur together
Suggests that they have a common cause
Both linked to imbalances in neurotransmittter serotonin
Kaye et al (2001)
Compared levels of neurotransmitters serotonin, dopamineand noradrenaline in recoverd bulimics and a control group of people who'd never had it
Dopamine and Noradrenaline levels were the same in both partys but serotonin levels were abnormal in recovered bulimics
Neural Explantions
Nitric Oxide
Neurotransmitter involved in regulation of food intake
Transmit information to other neurons
Vannacci et al (2006)
Assessed effects of Nitric Oxide in Bulimia
Studied 62 female patients who'd been refered to outpatients for eating disorders
Of these, 50% were diagnosed as suffering from Bulimia
Measured plasma nitrate and cGMP levels
Plasma nitrate and cGMP levels were a lot higher in Bulimia patients than healthy patients
Among Bulimia patients there was a positive correlation between nitrate levels and frequency of binge eating episodes
Gender Biased- only looked at females
Neural Explanations
Evoloutionary Explanations
Sexual Competition hypothesis
Abed (1998)
Suggests Bulimia is a direct consequence of the evolved need to compete with other females to attract men
Evoloution of nubility
Research shows that in women waist to hip ratio (WHR) determines how attractive males find them
Most attractive is between 0.7 & 0.8 (Singh 1994)
To avoid cuckoldry males have developed an aversion to even slightly larger waists as it is an indication of pregnancy
Sexual Competition
Helps women compete with other nubile (sexually mature and attractive) females for the best long-term mate
Culture Biased- only looks at western cultures
Longitudional study in Minnesota found Bulimia is 33 times greater in females than males
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