Eating Behaviours Flashcards
Anorexia Nervosa
- inability to eat
- fear of weight gain
- self-starvation
Herman and Mack
restraint theory
- cog exp for overeating
- stress = stripped inhibitions
Enmeshment
Minuchin - over involved families
- no autonomy = anxiety
anorexia = regaining of control
Wegner (1987)
white bear though experiment = told not to imagine - imagined every single time - suppression - more likely
Dual Control Theory
glucose = low liver tells LH to create hunger
glucose = rises - VH creates satiety
Lashley (1938)
neural mechanisms = hunger / satiety
VH/LH
Ghrelin
hunger hormone
- stomach into bloodstream = hunger
- slowly reduces after food
Zhang (1994)
identified leptin
rats given additional leptin
- starved
Leptin
secreted from fat - signals that reserves are full - satiety
Garcia (1975)
radiated rats given water solution - associated illness with water - averse to the water.
OR
wolves - sheep aversion
acculturalisation
different cultures - adopt new foods from a new culture
- NA innate pref for sweet.
Bell (1973)
sweet pref North A environmental niche
Restraint theory
cog - more preoccupied with food = more likely to overeat - 80% fail food targets as targets keep food in mind
Bruch (1971)
anorexia = adolescents crave autonomy - distorted body image = loss of control = cant identify internal states of hunger
- 51 AN girls mothers int = maternal influence PSYCHOPATHOGENIC
Disinhibition
- stress / palatable food - removes restraint / inhibitions = overeating
- less satieted
Minuchin (1978)
anorexic family =
- enmeshment
- rigidity
- overprotective
- no conflict resolution
body dysmorphia
obsessing over body / self-perceived imperfections
Becker (2002)
US tv shows in Fiji =
- old body type = larger
- 74% report they felt too big - want to look like US
Adapted to Flee
hunter gatherer genes = can run and adaptively prevent feelings of hunger for movement - maladaptive in modern day- allows for anorexia
Holland (1986)
56% monozygotic CR - more likely to be AN if mono twin is rather than (7%) dio.
Neophobia
fear / unwillingness to try new foods - bio adaptive in order to avoid ‘bad food’ - mostly when younger
Bailer (2007)
serotonin disturbances in eating disordered ppl - highest = AN - higher serotonin = increased appetite / supressed anxiety
Taste Aversion
innate mechanism - Seligman
- avoid foods that have previously made you ill
- prevents from eating poison
Kaye (2005)
comp 10 AN recovery / 12 control
- PET scan - AN = more activity in Basal Ganglia = dopamine - struggle to interpret pleasure from eating.
