PSY 150A1 Lecture Notes - Lecture 10: Body Mass Index, Anorexia Nervosa, Ventromedial Nucleus Of The Hypothalamus

• School: University of Arizona
• Department: Psychology Main
• Course: PSY 150A1
• Professor: Adam Lazarewicz

Document Summary

What is motivation? motivation: need or desire that energizes and directs behavior. What about learned motives: instincts: biologically-determined behaviors essential to survival, early explanation for human motivation, but . Hierarchy of needs: fundamental needs (bottom of pyramid) need to be met before moving up self-actualization: realizing one(cid:495)s potential physiological influences on hunger: Types of motivation: hunger feedback from stomach, intestines, liver. Brain monitors glucose levels (hypothalamus) filling rat(cid:495)s stomach with saltwater reduces hunger less than milk the hypothalamus & hunger: lateral hypothalamus: initiates hunger. Stimulation hunger lesioned no interest in food ventromedial hypothalamus: suppresses hunger. Stimulation stop eating lesioned continuous eating set point theory: hypothalamus strives to maintain optimum body weight (set point) leptin: eating produces leptin (hormone released by fat cells) leptin level and hunger are negatively correlated psychological influences on hunger. Memory of last meal: amnesiacs sometimes repeat meals jealousy?? obesity: body mass index (bmi) score greater than 30.