The limbic system

Question 1

We do not start/stop eating only because we are hungry/full. What are two other reasons?
1. S____ or r____ of appetite through l____ a____
2. S____ of appetite through t____ and s____ even when s____/f____

Answer 1

1. Stimulation or reduction of appetite through learned associations
2. Stimulation of appetite through taste and smell even when satiated/full

Question 2

What is meant by anticipatory eating in babies?

Answer 2

At around 3-6 months they switch to a large feed last thing at night
This large meal anticipates the relative difficulty of obtaining night-feeds. So this is not to relieve hunger, but in anticipation of possible hunger

Question 3

What is meant by cue potentiated feeding in humans?

Answer 3

Food specific visual and auditory cues enhance feeding in children

Question 4

What is one main motivator why we eat?

Answer 4

Pleasure

Question 5

What were three results found from selective lesions of dopamine neurons?
1. Animal became a____ and a____ (didn’t e____/d____)
2. If f____ to eat/drink, rats showed p____ responses and drank s____ but not b____ solutions
3. Depleting d____ in the n____ a____ makes rats a____ but does not change taste pleasure

Answer 5

1. Animal became aphagic and adipsic (didn’t eat/drink)
2. If forced to eat/drink, rats showed pleasure responses and drank sweet but not bitter solutions.
3. Depleting dopamine in the nucleus accumbens makes rats aphagic but does not change taste pleasure

Question 6

Limbic brain areas alter hypothalamic processes to influence what?

Answer 6

Motivation and emotion

Question 7

Which areas are critical in homeostatic regulation?

Answer 7

Hypothalamic areas