PSYCH 111 Lecture Notes - Lecture 13: Twin, Hypothalamus, Disclose
Document Summary
Things in the environment are releasers which lead to instinctual pre- programmed responses. Environmental releaser > triggers > xed response patterns: drive (drive reduction) theory. Intrinsic incentives: activities that are an end unto themselves i. e. eating, watching cartoons. The stomach is only part of it : people who have their stomachs removed still get hungry, amnesics will keep eating (forget that they ate, monitoring glucose levels: eating increases glucose levels in bloodstream. The hunger-regulation cycle: when blood glucose is low, people become hungry. Food raises glucose, reduces hunger and eating: hypothalamus, de nition: brain structure that regulates body temperature, release of hormones, and monitors glucose levels. Later hypothalamus (lh): hunger center ; if stimulate these cells, animal eats and eats. Ventromedial hypothalamus (vh): satiation center ; stimulate this and animal will not eat. Destroy vh and animal eats and eats: hunger drive.
