Stress

Covering the body's biological reaction to stress, key studies and treatments

?

Physical Symptoms of Stress

  • Lack of appetite
  • Craving for food when under pressure
  • Insomnia
  • Headaches
  • Nail biting
  • Nervous twitches
  • Constipation or diarrhoea
  • Frequent heartburn or indigestion
  • Tendency to sweat for no good reason
  • Nausea
  • Breathless with exertion
  • Fainting spells
  • Frequent crying or desire to cry
  • Impotency or frigidity
  • Inability to sit still without fidgeting
  • High blood pressure
1 of 19

Mental Symptoms of Stress

Mental Symptoms:

  • Constant irritability with people
  • Feeling unable to cope
  • Difficulty in making decision
  • Awareness of suppressed anger
  • Lack of interest in life
  • A feeling of being a failure
  • A feeling of being bad or self-hatred
  • A feeling of ugliness
  • Inability to show true feelings
  • Loss of sense of humour
  • Feeling of neglect
  • Dread of the future
  • Difficulty concentrating
  • The inability to finish one task before rushing on to the next
2 of 19

SAM

First response (startle response) is immediate and operates within 30 seconds of a threat. This is the Sympathetic Adrenal Medullary (SAM) response.

Process:

Sympathetic Adrenal Medullary -> Adrenal Medula -> Releases Adrenaline

Effects:

  • Pupils dilate
  • Breathing rate increases
  • Heart pumps harder and faster
  • Blood supply to the legs increase
  • Shuts of your digestive and reproductive systems
  • Adrenaline is released from the adrenal glands on the kidney
3 of 19

HPA

If the stress is prolonged then the "back-up system" responds and this is the Hypothalmic Pituitary Adrenal Access (HPA) response.

Process:

Hypothalmia Pituitary Adrenal Access -> Pituitary gland (releases Cortico Releasing Factor) -> Adreno Cortico Trophic Hormone ->Releases Cortisol

Effects:

  • Pupils contract
  • Slows heart beat
  • Constricts bronchi
  • Builds up energy for future use
  • Stumulates activity in the digestive/reproductive systems
4 of 19

Effects of stress

Seyle's GAS (General Adaptation Syndrome) Model:

5 of 19

Effects of stress

Immune system

Night - body produces TH1 cells
Day - body produces TH2 cells

  • With the stress response, one loses sleep therefore producing less TH1 cells and comprising one's immune system
  • Low TH1 cells mean that abnormal body cells are not recognised and you are more susceptible to cancer
  • TH2 cells link to inflamory responses so with a lack of cells, one will suffer from spots, IBS, constipation and infection cannot be fought as well
6 of 19

Studies

Segerstrom and Miller

  • Meta analysis of 293 studies over 30 years
  • In the short-term your immune system can be benefited
  • Long-term chronic stress leads to the suppression of the immune system, the most chronic stressors associated with the global supression

Cohen and the cold

  • 392 healthy participants
  • Gave participants nasal drops with 5 common cold ciruses
  • After two weeks 1/3 had a cold
  • Those who had contracted a cold scored highest on the physicological stress scoring system
  • Direct correlation between high stress levels and susceptability to a cold
  • Lab setting - high control
  • Took individual differences into account (weight, smoking etc)
  • Unethical giving someone a cold
7 of 19

Further studies

Kiecolt and Glaser

  • Used 75 medical students (notoriously the most hard worked students)
  • Took blood samples from them a month before/during their final exams
  • White blood cells were considerably lower in the sample from during their exams

Carer study

  • Carers (average 8 years care of Alzheimer's patients) scored much higher than controls on a stress questionnaire
  • A small wound was created on the forearm
  • The average time taken for the wound to heal was 48 days - the control group was 39 days
  • Caregivers were on medication and there was a small sample size
  • Unethical? Though the carers would know how to keep said wound clean
8 of 19

Personality type

Type A

  • Impatient
  • Competitive
  • Hostile cynicism
  • Frustration
  • Aggression
  • Cortisol build up from being more stressed than Type B

Type B

  • Patient
  • Cooperative
  • Easygoing
  • Laidback

N.B: Type C is Type A repressed (more likely to get cancer from lack of TH1 cells as explained earlier) and Type D is Distressed.

9 of 19

Type A

A Type A personality is dangerous and can lead to:

  • Hypertension
  • Coronary Heart Disease (narrowing of the Coronary Arteries from high blood pressure from extra Cortisol)
  • Stroke (again, disruption of blood flow to the brain from narrowing blood vessels from Cortisol)
  • Stress from a Type A personality also leads to increased glucose levels leading to clumps blocking the artery
  • Stressed individuals are also more likely to engage in unhealthy behaviours e.g. smoking, drinking, drug taking and binging.
10 of 19

Studies into Type A Personality

Williams

  • 13,000 healthy people completed a 10 question anger scale
  • Six years later 256 had experienced heart attacks
  • Those who had scored highest on the anger scale were over 2.5 x more likely to have a heart attack

Friedman and Roseman:

  • 3524 Calfornian men aged 39 - 59 (all free from CHD)
  • After 8.5 years, 7% had some signs of CHD and 2/3 of those men were Type A and no overly-strong correlation - only 7%

Men and heart attacks

  • 500 men with 13.2% annually at risk of a heart attack
  • Given sounselling designed to reduce Type A behaviour (and hostility)
  • Reduced to 7.2% annually at risk of further heart attacks
11 of 19

Social Readjustment Rating Scale

Holmes and Raye created the Social Readjustment Rating Scale giving each Life Event a "mean value" of Life Change Unit (LCU) showing how stressing it will be on the person experiencing it e.g. Death of a spouse has a LCU of 100.

Kannet et al also created a similar scale of "The Hassles of Middle-aged Adults." It was a simple rating of concerns of adults on a scale of 1 - 10, with the most distressing thought for an adult being number 1 (Concerns about weight.)

Rahe did a quesstionnaire of life events experience over the previous six months with the illness score calculated on the 7 month tour of duty of Navy soliders and found that a LCU of 118 was given. There was no strong correlation but the number was significant.

12 of 19

Job stress

Johansson et al

  • Researcher identified a high-risk group of 14 finishers in a Swedish sawmill
  • The job was machine-paced, isolated, very repetitive yet highly skilly
  • They were compared with a low-risk group of 10 cleaners whose work was more varied
  • The high-risk group secreted more stress hromones on work days than on rest days and higher levels than the control group

Marmot et al

  • Job strain model - 7372 civil servants (from London)
  • High workload creating greater job demands
  • Low job control over deadlines and procedures
  • Higher grade employees would experience a high world load whereas lower grade exployees would experience low job control
  • No link between high workload and stress-related illness in the higher grades
13 of 19

Coping with stress

(If you are too stressed then you cannot solve anything at all)

Problem focussed coping:
N.B:
If the problem cannot be solved then this is a limitation

  • Thoughts or action acting directly on a stressful situation
  • Seeking information
  • Emotional regulation
  • Direct action
  • Planning
  • Decision making

Emotional focused:
N.B: Doesn't solve problem direction but a change of emotion may help solve problem.

  • Talking to a friend
  • Support seeking
  • Distraction
  • Doesn't tackle the problem itself
14 of 19

Hardy personality

Kobasa

  • The Hardy Personality - to see situations as challenges
  • Control - in stresssful situations you need control
  • Commitment - problem focused
  • See stress as a challenge - eustress
  • Social support - women (though a social network can also cause stress)
  • Exercise - gender approach

The Transactional Model of Stress - Cox/EEA - Environmental enolutionary approach

Primary appraisal: Is it a threat? Is it a challenge?
If it is a challenge/threat then move on to the secondary appraisal.
Secondary appraisal: Can I cope? Do I have the resources?
If you do not have the resources then you will feel negative stress
If you do then it becomes eustress (positive stress)

15 of 19

Hardiness

Klag and Bradley

  • Assessed hardiness, neuroticism, stress, symptoms of illness and approach/aviodance coping
  • Male and female staff at an Austrailian University
  • Commitment and control correlate negatively with stress and illness
  • Neuroticism was the most significant thing
  • Neuroticiam may be the cause as commitment, challenge and control were non-significant if neuroticism was controlled
  • Adverse effects of stress on health are significantly less on hardy men and it acts as a buffer
  • Benefits of hardiness are not linked to emotion/problem focussed coping
16 of 19

Stress and drugs

 Beta blockers:

  • Contain Beta Adrenergic blocking drugs
  • Fills the adrenaline receptor so it cannot affect the heart during the stress response
  • Good for people with heart disease
  • Can up the effects of obesity
  • Can cause sleep disturbance and muscle fatigue

Buspirone

  • Treats Generalised Anxiety Disoder
  • Shows no signs of addiction or dependancy
  • Different from Benzodiazipines
  • Acts against seritonin
  • Headaches
  • Better tolerated
17 of 19

Stress and drugs

Barbituates

  • "Sleeping tablets"
  • Easily addictive
  • Serious side effects - cognitive impairment
  • Tolerance can be built up
  • Depresses CNS (physical effects)

Benzodiazipines

  • Minor tranquilisers
  • Increase the action of the neurotrnasmitter
  • Mimcs the body's stress relievers
  • Effective with the greater majority of people
  • Rapid onset of action and can reduce stress quickly and are generally well tolerated for a short period of time
18 of 19

Stress and drugs

SSRI - Selective Seritonon Reuptake Inhibitor

  • Used effectively to treat depression - effective in the exhaustion phase
  • Most common
  • Leaves seritonin in the synaptic gaps
  • 80% effective against depression

SIT - Stress Inoculation therapy

  • Adv:
    Conceptualisation
    Review of past situations, realistic understanding of demands
    Sources stress and works on coping strategies
    Real life application
  • Disadv:
    Requires time and commitment
    Changing behaviour will always be difficult
    Stress and anxiety levels (through personality) are difficult to change
19 of 19

Comments

Philippaaa

Report

Thannnnnk you Catrin!! :D **

Similar Psychology resources:

See all Psychology resources »See all Stress resources »