Ninguno
• The main types of motivation are:
• Biological: hunger, thirst, safety, reproduction
• Achievement
• Belonging
I. Biological motivation:
•The activity of biological systems for maintaining survival are explained in terms of homeostasis
• Homeostatic systems are designed to maintain a steady state through feedback regulatorymechanisms (e.g. body temperature)
Hunger:
• Triggered by variations in blood chemistry – low glucose, high insulin
Some sensors in liver and stomach
• Body weight maintained at a set point(see the fat rat)
• Set point maintained by the hypothalamus (also controls thirst and regulates metabolism and hydration)
• Lateral hypothalamic lesions produce aphasia (weight loss)
•Ventramedial hypothalamic lesions produce hyperaphagia (weight gain)
• Damage to hypothalamus can produce adipsia (no drinking) or poly dipsia (excessive drinking)
Dieting – cycles of weightloss and weight gain
Anorexia Nervosa and Bulimia
• Nervosa refers to this being a nervous system disorder
• Anorexia is defined as body weight 15% below the normal
• Conditioncharacterized by emaciated body, depression, negative body image
• 9/10 cases occur in females and surfaces during adolescence
• Bulimia (binging and purging behaviour) is far morecommon that Anorexia (Princes Dianna)
• Half of Anorexics are also Bulimic
• Bulimia is easier to hide than Bulimia
Causal factors
• Anorexic – often families are competition, highachieving, protective
• Bulimia – often families are alcoholic, obese, depressive
• There is a genetic contribution but it is considered small
• Cultural influences areconsiderable
o Fat is ugly (other less affluent cultures often think of fat a s beautiful)
o Stereotypes of beauty - Barbie adjusted to life scale would have dimensions of 32 – 16 – 29...
Regístrate para leer el documento completo.