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Lecture

Chapter 9.docx


Department
Psychology
Course Code
PSYCH 2030A/B
Professor
David Vollick

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Chapter 9: physical disorders and health psychology
Physical disorders and health: an overview
- Psychologist behavioural and social factors (biopsychosocial model)
- Psychological approaches to health and disease
o Behavioural medicine: prevenon, diagnosis, treatment of medical illness
o Health psychology: psychological factors in promoon of health change life styles
o Psychosomac: problem: suggests no biological component (its in your mind)
- DSM-IV and physical disorders:
o Coded on axis III (physical disorder)
o Recognize that psychological factors can aect medical condions
Overview of stress and the stress response
- Nature of stress
o Stress: physiological response of an individual to a stressor: varies from person to
person
- Stress response and the general adaptaon syndrome (Hans Selye)
o Put rat in stressful situaon and look at the biological response (the rat died at the
end)
o Phase 1: alarm response (sympathec nervous system arousal)
o Phase 2: state of resistance (mobilized coping and acon)
o Phase 3: state of exhauson (chronic stress, permanent damage)
Biology of stress
- The funcon of the hippocampus in HYPAC-stress response cycle
o Stress acvates the sympathec branch of the ANS (automac nervous system)
o Hypothalamus secretes corcotropin releasing factor, which acvates the pituitary
gland, which secretes corsol: HPA axis acvaon
- The hippocampus is very sensive to corsol, and if smulated, helps turn o the stress
response
- Chronic stress may damage cells in hippocampus => interfering with stopping the HPA loop
Psychological and social factors: their relaon to stress physiology
- Primate research: high and low social status
o High corsol is associated with low social status
Fewer lymphocytes (go aer genes and destroy them) and immune
suppression
Less sensive to corsol= less eciency in turning o the stress response
o Dominant males: benet from stability, predictability and controllability
The immune system: overview and its funcons
- Funcon of the immune system
o Idenfy and eliminate angans (foreign materials) from the body
o Leukocytes (WBC= white blood cells) are primary agents
- Leukocytes: subtypes and funcons
o Killer T: viruses & cancer
o Helper T: tell killer T to destroy and B cells to make anbodies
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