Unit 15- Stress and Abnormal Behaviour Flashcards
Four components of stress
Physiological
Behavioural
Emotional
Cognitive
Stressors
Any stimuli that cause stress. Changes in the environment brought about by cultural changes have helped to make stress commonplace, however stress is a product of natural selection, which helps us confront or escape threatening situations.
What is stress (maybe more biological)
is a biological response that is experiences as an emotion, although the form it takes varies depending on the nature of the stressors. In some situations we may feel frightened and in others we may feel inspired or exhilarated
Our physical response to stress is governed by
the automatic nervous system which is controlled by the hypothalamus.
when an individual senses a stressor
the hypothalamus sends signals to the autonomic nervous system and to the pituitary gland both of which respond by stimulating body organs to change their normal activities.
Biological steps to stress/ These physiological responses are adaptive which prepares us to either confront a stressor or run from it.
- Heart rate increases, blood pressure rises, blood vessels constrict, blood sugar levels rise and blood flow is directed away from extremities and towards major organs.
- Breathing becomes deeper and faster and air passage dilate, which permit more air to enter the lungs.
3.Digestion stops and perspiration increases. - The edrenal glands secrete adrenaline (epinephrine) which stimulates the heart and organs
There are two instances in which such responses are maladaptive
First stress can produce anxiety which may impair one’s ability to perform a task. Secondly the effects of prolonged and severe stress place people at increased risk of illness.
Selye found that chronic exposure to stressors produces a sequence of three physiological stages collectively
- Alarm
- Resistance
- Exhaustion known as General Adaptation Syndrome (GAS
Much of what we know about stress is attributed to
Canadian endocrinologist Hans Selye (1907- 1982).
The responses in the alarm stage involve arousal of the autonomic nervous system and occur when the organism is first confronted with a stressor.
During this stage the organism’s resistance to the stressor temporarily drops below normal and the organism may experience shock. With continued exposure to the stressor, the organism enters the stage of resistance, during which the autonomic nervous system returns to normal functioning. Resistance to the stressor increases and eventually levels at about normal levels. The stage of resistance then reflects the organism’s adaptation to environmental stressors, however with continued exposure to the stressor, the organism enters the stage of exhaustion. During this stage the organism loses its ability to adapt and resistance drops to below normal levels, leaving the organism susceptible to illness and even death.
Why then can they harm our health/ fight or flight response
our emotional responses are designed primarily to cope with short-term events. The physiological responses that accompany the negative emotions prepare us to confront or run away from threatening situations
some diseases that attributed to stress
coronary heart disease, hypertension, skin cancer and many psychophysiological illnesses, as well as autoimmuniological diseases
Post traumatic stress disorder
The aftermath of tragic and traumatic events such as wars and natural disasters often include psychological symptoms that persist long after the event occurred. is an anxiety disorder in which the individual has feelings of social withdrawal accompanied by untypically low levels of emotion
The symptoms produced by PTSD
recurrent dreams, or recollections of the event (flashback episodes) lead the person to avoid thinking about the traumatic event which often results in diminished social activities, feeling of detachment from others, suppressed emotional feelings and a sense that the future is black or empty. Particular psychological symptoms include difficulty falling or staying asleep, irritability, outbursts of anger, difficulty in concentrating and heightened reactions to sudden noises or movements. Children may show particular symptoms not usually seen in adults, including loss of recently acquired language skills or toilet training, stomach aches and headaches.
Coping
means dealing with a situation, for the psychologist is the process by which a person takes some action to manage environmental and internal demands that cause or might cause stress.
Coping involves five important components
1.It is constantly evaluated; and is therefore a strategy or process
2. It involves managing a situation, not bringing it under complete control
3. It requires effort, it does not happen automatically
4. It aims to manage behavioural as well as cognitive events
5. It is a learned process
Vulnerability
is the extent to which people are easily impaired by an event and thus respond maladaptively. Whether a person is vulnerable or not depends on his coping skills. In some cases people develop a sense of learned helplessness which results from learning that rewards and punishment are not contingent on behaviour. A person’s vulnerability is affected by the extent to which he or she has social support. Group therapy can be especially effective in alleviating anxiety.
According to psychologist Richard Lazarus (1982) People faced with constant stress have two coping strategies
1) defense or (2) task oriented coping strategies
Defense oriented coping strategies/ emotion focused strategy
distortion of reality in order to defend themselves against life’s pressures and to tolerate and deal with psychological disturbances. Freud and other personality theorists call these strategy defense mechanisms.
Task- oriented/ problem focused coping strategies:
: use of therapists, stress management seminars, peer counselling, psychiatrist etc. The general intention is to source the help from external sources. Most psychologists especially behavioural psychologists recommend task oriented coping strategy.
on coping with stress and reducing physical symptoms
Applied psychologists such as Schier and Carver (1985) claim that simply maintaining a positive attitude can have beneficial effects
How people develop learned helplessness
showed that people who engaged in small self deception however may be healthier than those who focus on their anxiety. People who emphasize the negative aspect of their existence may develop learned helplessness, they may chose inaction because they feel helpless or powerless in controlling events
Resistance to stress stages
1.Alarm stages-stressor disrupts body’s stability, temporarily lowering resistance.
2.Resistance stages- Adaptation resources are mobilised to combat stressor, and body maintains a higher level of resistance
3. Exhaustion stages- Body runs out of adaptation energy stores for adjusting for stressor, and resistance drops below normal.
General Adaptation Stress
the first stage he describes as the Alarm stage. This is the individual’s first encounter with the stressful situation arousing the autonomic nervous system. The individual’s resistance to stress dips below their normal level resulting in a state of shock e.g. at the first instance of physical abuse, the person might experience a state of shock.
The second stage of the prolonged stress is known as the Resistance stage. This is where the individual begins to adapt to the situation and the resistance levels goes back to being normal e.g. after being abused for several times, a person may get accustomed to the situation and its triggers.
The last stage of Seyle’s discovery is the Exhaustion stage. At this stage the individual loses all control and is unable in any way to adapt to the overwhelming stressful situation, leading to a complete break-down or even death e.g. after increasing physical abuse the situation will more than likely end in some kind of violent outburst or even turn into a deadly event.