The Rome Of Neural Mechanisms In Controlling Eating

Question 0

CONTRADICTING NPY RATS

Answer 0

However genetically manipulated mice that did not produce NPY showed no subsequent decrease in feeding behavior

Question 1

RATS NPY

Answer 1

Rats that had NPY injected into their brains continued eating large amounts of food even when full leading to obesity.

Question 2

Cummings

Answer 2

Ghrelin : monitored participants ghrelin levels every 5 mins and Ps assessed hunger levels every 30 mins. In 5 out of 6 found a positive correlation.

• small sample hard to generalize
• likely that ps subjective judgements of hunger were influenced by meal times (more cultural than biological factors)

Question 3

CCK RATS

Answer 3

When CCK was injected into rats their meal size decreased

Question 4

Hetherington’s Rats (VMH)

Answer 4

VMH :
stimulated VMH > starvation
Damaged VMH > hyperphagia

Question 5

Hetherington’s Rats (LH)

Answer 5

LH :
Stimulated LH > excessive feeding
Damaged LH > starvation (aphagia)

Question 6

Washburn

Answer 6

Supports Cannons Theory : swallowed a balloon and inflated it > no longer felt hungry

-Reductionist: huge oversimplification. Later found that when patients had stomachs surgically removed and still felt hungry.