MOTIVATION EMOTION AND STRESS
MOTIVATION AND EMOTION
Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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ventromedial hypothalamus
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lateral hypothalamus
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Either A or B
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None of the above
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Detailed explanation-1: -Ventromedial nucleus of hypothalamus (VMH) has been designated as the satiety center [1]. Its stimulation causes cessation of eating in the animals, whereas bilateral lesions results in hyperphagia, polydypsia, increase in body weight and finickiness [2, 3].
Detailed explanation-2: -VMH is the important center for satiety and adiposity and could be the ultimate pathway for control of food intake and obesity. The mechanism of hyperphagia as a cause of increased body weight after VMH lesion could be the possible mechanism for obesity.
Detailed explanation-3: -When the ventromedial hypothalamus is damaged, an individual cannot feel sated after eating. This lack of satiety causes excessive hunger, overeating and weight gain, leading to obesity.
Detailed explanation-4: -Within the hypothalamus are nerve cells that, when activated, produce the sensation of hunger. They do so by producing two proteins that cause hunger: neuropeptide Y (NPY) and agouti-related peptide (AGRP). Quite close to these nerve cells is another set of nerves that powerfully inhibit hunger.