motivation Flashcards
what is the hedonic principle?
-all people are motivated to experience pleasure and avoid pain
We’re trying to keep the needle on our “emotional gauge” to “good”
what are theoretical approaches to motivation
-instinct
what is instinct?
a complex behaviour that is automatic and unlearned, and occurs in all members of a species, such as maternal behaviour.
what is the issue with instincts an an explaination
there would be too many
what do behaviourists believe about motivation
behaviours are evoked by EXTERNAL stimuli, not hypothetical internal states
behaviours are LEARNED not INHERITED
what is drive theory?
Drive theory: The body maintains homeostasis—equilibrium—in its systems.
Departure from homeostasis produces an aroused condition, or drive, impelling the individual to engage in appropriate action.
define homeostasis
the tendency for a system to take action to keep itself in a particular state
define drive
an internal state driven by departures from physiological optimality
list maslows heirarchy of needs
top of triangle
1) self actualization
2) esteem
3) love/ belonging
4) saftey
5) physiological
what is self actualization?
a person’s motivation to reach their full potential
what does maslow’s heirarchy of needs suggest about self actualization
those needs below it must be met for it to be achieved
what lesion made rats skinny?
lesions of the lateral hypothalamus
what lesion made rats overweight?
lesions of the ventromedial hypothalamus
what is lateral hypothalamic syndrome?
rats get too thin
what is ventromedial hypothalamic syndrome?
rats get too fat
what is grehlin?
a peptide produced by the stomach as it empties
This is an orexigenic signal — it makes us feel hungry
what does grehlin signal?
the lateral hypothalamus
which initiates eating
chewing, swallowing, salivation, insulin production
how does locomotion in regard to eating occur and why?
cortical arousal from lateral hypothalamus
movement to find food
what experiment showed the effects of ghrelin?
rats eat 4x as much compared to when injected with saline
what does leptin cause?
when injected into the ventromedial hypothalamus it produces satisfaction
what is the most common eating disorder?
obesity
what BMI defines obese
30+
why is BMI not a perfect measure?
for example, it doesn’t differentiate between muscle, bone and fat.
which are top 3 nations for obeisity?
USA Mexico UK
if we consider all people overweight what countries are highest
US, NZ, AUZ, UK, Canada, Ireland
what BMI is morbidly obese?
40+
what BMI is overweight?
25-29
what does obesity cause?
- pulmonary disease
- nonalcoholic fatty liver disease
- gall bladder disease
- gynecologic abnormalities
- arthiritis
- skin
- gout
- phlebitis
- cancer
- severe pancreatitis
- coronary heart disease
- cataracts
- stroke
- idiopathic intracranial hypertension
what does obesity also cause regarding cell loss
temporal lobe cell loss–> + dementia risk
is obesity heredity?
yes identical twins= 70%
identical twins apart= 60%
fraternal= 30%
what is Basal metabolic rate BMR?
the energy required to fuel the brain and body and maintain temperature;
accounts for 75% of energy expenditure in the average sedentary person.
what effect can BMR have on weight and what supports this?
lower BMR= harder to loose weight
In a study of women on a restricted diet, the 1/3 who failed to lose weight had lower BMRs.
what % heredity accounts for a person’s BMR?
40%
who does leptin treatment work for in terms of weightloss?
leptin defficient individuals
how is ghrelin production reduced?
decreased stomach stimulation