Motivation & Emotion Part 2 - A couple of motivated...

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A couple of motivated behaviors Hunger cues from the blood •Blood carries information from digestive system to brain –Short Term Hunger Information •Absorbed nutrients •Hormones –Long Term Hunger Information •Stored Fat Short Term Hunger •Glucose –Main form of sugar used by cells –Levels of glucose rise –> pancreas creates insulin –Insulin interacts with CCK to tell the brain you are full –Glucose Eating
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Long Term Hunger • Leptin – Leptin Hunger – Leptin Hunger • Is this finally a cure for obesity?! – Sorry – not likely. • Unless your body is deficient in producing Leptin (rare) The Brain •Hypothalamus –Two important subdivisions of the Hypothalamus •Ventromedial Nucleus •Lateral Hypothalamus Verntromedial Nucleus • Tells us - no need to eat • Stimulated = stop eating • Destroyed = Gorge! Lateral • Stimulated = Gorge! • Destroyed = Stop eating Disorders • Obesity • Anorexia Nervosa • Bulimia Nervosa
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Obesity •World Health Organization: obese if Body Mass Index (BMI) is over 30 –BMI = (Weight in Kg)/(height in meters) ² •Flawed –Obesity is on the rise across the world •Especially in USA! Obesity •Why more frequent? –Not entirely clear but related to overeating and under exercising •How do we fix it? –Bariatric Surgery •Drastic! –Drug treatments Anorexia Nervosa •Weight loss to below 85% of normal •95% are young females –Teens •Extreme Physical Damage –Increases risk of fractures –Heart problems –Between 4-30% die of starvation, biochemical
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Motivation & Emotion Part 2 - A couple of motivated...

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