Biological Explanations of Eating Behaviour

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  • Created by: tiacoles
  • Created on: 29-03-16 19:57

AO1

Dual Control Theory

  • Lashley identified the hypothalamus as playing a vital role in regulating food intake. 
  • The lateral hypothalamus (LH) was seen as the hunger centre and the ventromedial hypothalamus (VMH) was the satiety centre producing the feeling of fullness and ceasing eating. 
  • The dual control theory is the homeostatic perception of hunger and satiety wheereby when glucose levels drop, the liver send signals to the LH that motivates hunger and search for food. 
  • When the glucose rises the V,MH is actiavted which gives satiety which prevents eating. 
  • The foods chosen depend on usual diet, culture, availability, habits etc. 
  • Theory problems occurred as rats had each hunger centre removed by still felt hungry/full 

AO2

  • Hetherington and Ranson found lesions to the VMH led to hyperphagia (overeating) and weight gain. Anad and Brobeck found that lesions to the LH lead to aphagia (undereating) and weight loss therefore supporting

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