Hunger motivation
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Hunger Motivation. Jorge Duc. Presenting… . Everyone’s favorite…. FOOD!. Why do we become hungry?. Factors for hunger. Biological Factors: Hypothalamus Glucose Levels Appetite hormones. Psychological Factors: Sight and smell of food Mood Internal and External cues

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Factors for hunger
Factors for hunger

  • Biological Factors:

    • Hypothalamus

    • Glucose Levels

    • Appetite hormones

  • Psychological Factors:

    • Sight and smell of food

    • Mood

    • Internal and External cues

    • Culture and Background


Biological factors
Biological Factors

  • 2 Parts of the Hypothalamus

    • Lateral Hypothalamus-When stimulated, causes you to feel hungry.

    • Ventromedial Hypothalamus-When stimulated, causes you to feel full.

    • Example of a rat with no ventromedial hypothalamus.

  • Set point theory.

  • Glucose levels.


Appetite hormones
Appetite Hormones

  • Insulin: Controls blood glucose, secreted by the pancreas.

  • Leptin: When abundant it causes the brain to increase metabolism and decrease hunger. Protein secreted by fat cells.

  • Orexin: Hormone that is secreted by the hypothalamus that triggers hunger.

  • Ghrelin: Secreted when your stomach is empty sending hunger signals to the brain.

  • PYY: Digestive tract hormone that sends “I’m not hungry” signals to the brain.


Psychological factors
Psychological Factors

  • External: Sight, smell, thought of food, and mood.

  • Internal: No presentation of food. Internal hunger cues.

  • Time since our last meal.

  • Food aversion(Garcia effect)

  • Culture

    • Hunger goes beyond the body and gets influenced a lot by your heritage and what your parents feed you(nurture)


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