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1. Stress & Physical illness. It can have a direct effect on your health.
It can interact with pre-existing vulnerability.
It can lead to behaviour changes that are not conducive to good health.
3. Stress & Illness cont… Stress can lead to risky behaviours.
Over-Eating
Drinking
Smoking
Therefore source of stress may be indirect.
Jacobs and Charles (1980) found that cancer patients - for example, child cancer patients, often suffered high levels of stress before the diagnosis of their illness.
5. Stress & heart disease Resting
Stress
Pulse increases
Increase blood flow
Blood vessels ‘harden’ & wear out
Heart Strain.
6. SRRS (Social readjustment rating scale) In 1967, Holmes and Rahe came up with the idea of a ‘social readjustment rating scale’ (or SRRS for short). This was an attempt to quantify life change - any change in your life that might cause stress.
Scores are calculated for a person’s experiences over the past year. Studies using the scale have found that high life change scores (300+) are related to relatively high frequency of illness, accidents and athletic injuries.
7. Evaluation of SRRS Does not take into account some people find some things stressful whilst others do not.
9. Evaluation of Type A study..
10. Direct effect on health Cohen et al (1991) 394 healthy participants were asked to complete a questionnaire assessing stress levels and then exposed to 1 of 5 respiratory viruses
Those experiencing most stress were most likely to develop colds.
This was a direct effect because there was no other variable.
11. Stress & the immune system. Leucocytes- White blood cells engulf and kill any pathogens. As well as worn out cells.
Immune system also remembers invaders- these invaders called antigens and maybe attacked directly.
Antibodies which bind to the antigens and mark them out for destruction
12. Stress & the immune system. Inflammation- Helps to repair damaged tissue by sending blood to damaged area ad this in turn allows white blood cells to the area in order to kill the invading pathogen e.g. bacteria.
Stress also corticosteroid helps to suppress IS.
13. Kiecolt-Glaser (1984) Exam stress on students
Blood samples from 75 1st yr med students one month before exam and on first day of term.
Within 1 mth reduced immune system to Epstein barr virus.
Also students with loneliness and no social support.