eating and appetite Flashcards
what is the set point theory of hunger
hunger consequence of energy deficit - we have an optimal level of energy resources which is a set point, and we need to return back to that point
problems with set point theory
evolutionary unlikely
not supported by evidence
ignorance of environmental factores
what is the positive incentive theory
anticipation - animals driven to eat by the expected pleasure of eating
eating is initiated by craving
other multiple factors - flavour of the food etc
what is the function of the ventralmedial hypothalamus
a satiety centre
what does a lesion to the ventralmedial cause
hyperphagia - overeating and obesity
what is VMH syndrome
ventralmedial hypothalamus syndrome - obesity
dynamic phase - overeating and weight gain
static phase - body weight maintained
what is the lateral part of the hypothalamus
a feeding centre
what is a lesion to the lateral hypothalamus called
aphagia - cessation of eating
what is LH syndrome
aphagia and adipsia - cessation of drinking
what does the hypothalamus regulated
the metabolism NOT eating
what do lesions to the VMH cause
increases in blood insulin
what is lipogenesis
production of fat
what is lipolysis
breakdown of body fat
other things caused by LH disturbances
motor disturbances, lack of responsiveness
evidence for stomach not being necessary for hunger
patients without stomachs still get hungry
