The other half, the entromedian, controls amount of food eaten. When working properly, t will stop the body from working when it is full. If damaged, the animal will eat everything insight, even I it is completely stuffed.
There are multiple motivations to eat. Sight and smell, habits, such as eating everyday it 12:30, eating with friends, and just physical activity are all motivations to eat. Culture has a great influence of what a person will eat and what they wont eat. North Americans would never consider eating a lamb's intestine, but in Ireland it is considered a staple of their meal, known as haggish. This is not just a human trait. Rats in experiments would most of the time chose the food they are most familiar with over something new even if it smelled good.
But cultural influences are not always a normal thing especially when it comes to women. In society, especially in the last twenty years, the ideal woman has been glorified as being tall, blond and extremely thin also known as cocaine models because they looked like addicts in some cases. Of course, in normal human society, only 1 woman in a 100,000 has the "perfect body". Dolls like Barbie don't help any either, with her painfully incorrect proportions.
What all this has led to is an increase in eating disorders. Anorexia Nervosa and bulimia are on one side of the spectrum and obesity is on the other. These are all psychologically motivated, but also there is new evidence that all three may have some genetic influence to it. All them are ways for women to try and make them feel better about themselves.
Anorexia has in the past developed a stigma that it is a girl starving herself to look pretty. It goes much deeper than that. Usually it is a sign of depression and a lack of self esteem a girl who is absolutely beautiful will see herself as fat and ugly and limit her intake of food, even when she gets so underweight it is difficult for her to stand up.
