A02 neural a mechanisms in eating behaviour

Question 1

What are the 4 subtitles for the neural mechanisms

Answer 1

Limitations of a monostatic explanation

Question 2

The role of the lateral hypothalamus

Answer 2

Fo such a mechanism (hinger) to be truly adaptive it must anticipate and prevent energy deficits, not just rest to them

Question 3

Conclusion for limitations of a homeostatic explanation

Answer 3

So the theory that hunger and eating are triggered only when the energy resources fall below their desired level is incompatible in reality.

Question 4

We talk about the lateral hypothalamus

Not brains eating centre according to who

Answer 4

Damage to the lateral hypothalamus doesn’t only effect hunger, by other aspects too

Also it’s been found that eating behaviour is not just controlled by the lateral hypothalamus but also by neural circuits through out the brain

So it’s not the brains eating centre (Sakurai et al)

Question 5

Who doubted that neuropathy y was responsible for influencing eating behaviour

Answer 5

Marie et al

Question 6

What did Marie et al do and find

Answer 6

Influence of npy is overstated

Genetic ally manipulated mice so that they didn’t make npy
Found no decrease in their feeding behaviour

Question 7

Talk about role of ventromedial hypothalamus

Who said it wasn’t that important

Answer 7

Gold
Said pvn more important cz of his findings

But nobody managed to replicate ether most found that lesions in vmh lead to far more eating and gaining Wright in comparison so vmh is the main role

Question 8

What are the 2 sections for neural control of cognitive factors

Answer 8

Kluver bucy syndrome

Research support

Question 9

Talk about liver bucy syndrome

Answer 9

Damage to amygdala and inferior frontal cortex could explain the feeding abnormalities observed in the kluver and bucy syndrome

Patients show increased appetite, indiscriminate eating and eating non food items

Question 10

Talk about research support

Who gave it support?

Answer 10

Zald and pardo

Question 11

What did zald and pardo do and find

To support idea that amygdala Pps in emotional processing of olfactory stimuli

Answer 11

Exposed healthy Pps to aversive olfactory stimuli while measuring blood flow to the amygdala by means of pet scan

Found produced significant blood flow increases to the amygdala but non aversive odours didn’t cause increase blood flow