Biological motivation
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Biological Motivation. Chapter 6 Key Terms: Motivation, Homeostasis, Drive Reduction Theory, Hypothalamus. Motivation. Define the following: Motivation Biological What might biological motivation mean? Examples?. Homeostasis.

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Biological Motivation

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Biological motivation

Biological Motivation

Chapter 6

Key Terms: Motivation, Homeostasis, Drive Reduction Theory, Hypothalamus


Motivation

Motivation

  • Define the following:

    • Motivation

    • Biological

  • What might biological motivation mean?

  • Examples?


Homeostasis

Homeostasis

  • Tendency of all organisms to correct imbalances and deviation from their normal state

  • Example:

    • Fever/sweating


Hunger

Hunger

  • Lateral Hypothalamus: makes us eat

    • More active when cold

  • Ventromedial Hypothalamus: makes us stop eating

    • More active when hot


Glucostatic theory

Glucostatic Theory

  • Hypothalamus monitors blood glucose

  • BG drops, LH stimulated

  • Insulin released

  • After meal: liver secretes glucagon


Set point theory

Set-Point Theory

  • Set-Point: weight around which day-to-day weight fluctuates

  • If VMH is destroyed, you will not eat until you explode


Obesity

Obesity

  • Dr. Stanley Schachter

  • Obese people respond to external cues for eating

    • Cracker & Almond experiments


Drive reduction theory

Drive Reduction Theory

  • Clark Hull (1943)

  • All motivation comes from physiological needs


Pulling it apart

Pulling it Apart

  • Not all drives have physiological origins

  • Harry Harlow monkey study

  • Pleasure centers in the brain are drives for stimulation


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