Motivation and Emotion

Motivation: a need or desire that energized and directs behavior

Instinct Theory: we are motivated by our inborn automated behaviors
-But instincts only explain why we do a small fraction of our behaviors

Drive-Reduction Theory: The idea that a physiological need creates an aroused tension state ( a drive) that motivates an organism to satisfy the need
-The need is usually to maintain homeostasis
-We are not only pushed by our needs but...pulled by our incentives a positive or negative environmental stimulus that motivates behavior

Maslow's Hierarchy of Needs
Abraham MAslow said we are motivated by needs and all needs are not created equal

Hunger: Hunger is both physiologicsl and psychological

                    Biological Basis od Hunger
Hunger does not come from the stomach, it comes from the brain

Which part of the brain?  Hypothalamus

Hypothalamus

Lateral Hypothalamus:

When stimulated it makes you hungry

-When lesioned, no more hunger

Ventromedial Hypothalamus:

When stimulated you feel full

-When lesioned, never feel full again