Neural Mechanisms in eating satiation

Created by: Leanne O'Donovan
Created on: 17-12-12 12:50

Explain Switch on eating

Lateral Hypothalamus activated when there is a decline in glucose levels, which results in a feeling of hunger. Eats food which increases the level of glucose to rise again.

1 of 12

Explain switch off eating

Rise in glucose levels activates the ventromedial Hypothalamus, which leads to satiation. Stop eating leads to decrease in blood glucose levels.

2 of 12

Damage to the Lateral Hypothalamus

Damage to the LH caused a condition called Aphagia (absence of eating).

3 of 12

Stimulation to the Lateral Hypothalamus

Leads to increased eating which is switched on behaviour eating.

4 of 12

Whats the neurotransmitter which turns on eating behaviour?

Neuropeptide Y

5 of 12

What did Wickens find?

Injections of Neuropeptide Y led to feeding behaviour even when satiated

6 of 12

What did stanley find?

Repeated injections of NPY into the hypothalamus of rats produces obesity in just a few days. That satisfaction of food is controlled by the neuropeptide Y.

7 of 12

Damage to the Ventromedial Hypothalamus

leads to overeating which is called hyperphagia.

8 of 12

Stimulation to the Ventromedial Hypothalamus

leads to inhibited feeding which is stop eating.

9 of 12

What negatives did Gold Find?

Damage to the nerve fibres passing through the VMH tends to damage the paraventricular nerve (PVN) and damage to the PVN infact causes Hyperphagia.

10 of 12

who carried out research into Leptin and Obesity?

Zhang

11 of 12

What did Zhang research and find?

some mice recieved two copies of the gene for obesity. These ob/ob mice tend to overeat, with foods high in fat and sugar. He found that ob/ob mice had a defective genes for the protein leptin. Injecting ob/ob mice with leptin causes loss in weight.

12 of 12

Other cards in this set

Card 2

Front

Explain switch off eating

Back

Rise in glucose levels activates the ventromedial Hypothalamus, which leads to satiation. Stop eating leads to decrease in blood glucose levels.

Card 3

Front

Damage to the Lateral Hypothalamus

Back

Card 4

Front

Stimulation to the Lateral Hypothalamus

Back

Card 5

Front

Whats the neurotransmitter which turns on eating behaviour?

Back

View more cards

Get Revising

Neural Mechanisms in eating satiation