Wednesday, November 11, 2015

motivation and emotion

  • emotion: combo of arousal, physical sensations, & subjective feelings, occurs spontaneously/automatically in response to envir. stimuli
  • motivation: arouses, maintains, & guides behav. toward a goal
relationship btwn them: tightly related, both subjective, similar processes & structures in brain, overlapping characteristics
  • mood is more general than emotion. can feel different emotions while in a certain mood
  • homeostasis: steady internal balance/equilibrium
  • set point: value that is defended to maintain homeostasis
  • motivation begins w stimulus (external or internal)
  • drive: state of tension & arousal triggered by cues important for survival --> action --> drive reduction: state of relief & reward by removing tension & arousal from state of drive
  • incentive: reward, pulls behaviors in particular direction
  • drive = push, incentive = pull
  • intrinsic rewards: reward arises from w/in, ex. goal is met/feeling of accomplishment
  • extrinsic: reward from outside, ex. money/praise
Hunger
  • internal cues: body needs nutrients
  • external cues: smell of food, time of day
  • glucose: type of sugar, plays role in hunger levels
  • glucose levels positive relationship w insulin <-- released by pancreas
  • insulin moves glucose from blood into cells
  • low levels of stored fat = hungry
  • body monitors fat stores by leptin: hormone secreted by fat cells, help body maintain appropriate level of stored fat 
  • fat stores & leptin = positively correlated
  • low fat stores --> activate parasympathetic (autonomic nervous sys.) --> metabolism slows
  • feeding stimulated by ghrelin & orexins
  • satiety: feeling full

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