AOS 1 - Stress Flashcards
(39 cards)
Stress
A state of physiological and psychological arousal produced by internal or external stressors that are perceived by the individuals as challenging or exceeding their ability or resources to cope
Stressor
A stimulus that causes or produces stress & challenges our ability to cope
- Internal - within individual
- External - outside individual
Eustress
A positive psychological response to a stressor is indicated by the presence of positive psychological states such as feeling enthusiastic and motivated alert and active
- short term, not harmful, provide energy
Distress
A negative psychological response to a stressor as indicated by the presence of negative psychological states such as anger, anxiety, nervousness, irritability to tension
- can be short term, or persist serious consequences
Acute stress
when stress is produced at very high arousal for a relatively short term (homework deadline)
Episodic stress
Is when acute stress occurs over and over again this may be referred to as episodic acute stress ( death of the dog, followed by the deadline, followed by divorce, followed by health problem)
Chronic stress
Involves ongoing demands pressures and worries that are long-lasting. Can seem to go on forever with little hopes of letting up. This type of stress produces an increased arousal level that persists over a relatively long time and is likely to be harmful in some way (poverty)
Daily pressures
Daily pressure is a type of stressor involving a little problem of everyday living that is irritant
- varying effects, not necessarily significant can pile up, upset or angry
Life events
Life events in relation to stress, a type of stressor in everyday life involving change that forces an individual to adapt to circumstances
- positive or negative, immediate consequences, long term adjustments, including choices
Acculturative stress
The stress people experience in trying to adopt to a new culture when living in it for a considerate period of time
- reducing acculturative stress - acceptance, familiarity, attitudes
Major stressors
A type of stressor involving an event that is extraordinarily stressful or disturbing for almost everyone who experiences it
- psychologically traumatic, life-threatening, strong emotional reaction, natural disaster, violence
Catastrophe
An event that causes widespread damage or suffering sometimes a stressor can disrupt and affect an entire community all at once.
- usually sudden, highly related to risks of continuing problems, epidemic, war, natural disasters
Flight fight freeze response
An involuntary physical response to a sudden and immediate threat (or stressor) in readiness to
FIGHT - confronting and fighting off the threat
FLIGHT - escaping by running away to safety
FREEZE - keeping absolutely silent, avoiding detection
Physiological responses to FFF
Activated by sympathetic NS
- increased heart rate & blood pressure
- redistribution of blood supply to muscles
- increased breathing rate
- dilation of pupils
How is FFF activated
- brain-body pathway that activates this is called the sympathetic adieno medullary when threat perceived
- signal sent to the hypothalamus
- hypothalamus activates sympathetic NS
- sympathetic NS stimulates the adrenal medulla which secretes hormones into the bloodstream
- stress hormones activate organs to respond to the threat
- when the stressor is removed parasympathetic NS returns the body to homeostasis
Freeze reaction
SNS always precedes freeze state but when initiated the PNS dominates over SNS = high arousal of both nervous systems leaving the individual in energy conservation mode and a motivated state ready for action
Cortisol
Steroid hormone released by the adrenal glands is often called the stress hormone
- essential for the maintenance of homeostasis
- the body’s not able to maintain the intensity of FF for prolonged periods of time
Effects of cortisol on the body
physical - impaired immune system functioning, high blood pressure
mental - learning problems, impaired memory, depression
How is cortisol released
Cortisol is released through the HPA Axis
H - hypothalamus stimulates
P - pituitary glands secrete hormones (ACTH) into the bloodstream
A - ACTH stimulates the adrenal cortex to secrete hormones ( mainly cortisol)
- takes longer than FFF but lasts longer
- long term stressors - HPA axis remains active and cortisol remains in bloostream
Seyle’s General Adaption Syndrome (GAS)
A three-stage process physiological response to stress that occurs regardless of the stressor that is encountered
Stage 1 - alarm reaction
Occurs when the person first becomes aware of the stressor
Shock - the body’s ability to deal with the stressor falls below the normal level. The body reacts as if it were injured, temp drops people at most vulnerable
Countershock - SNS is activated (FF response) body’s resistance to stressors increases. Adrenaline is released into the bloodstream heart and respiratory rate increases = more energy for muscles
Stage 2 - resistance
body’s resistance to stressor rises above normal
- intense arousal of alarm reaction diminishes, physiological arousal remains above normal, all unnecessary physiological processes are shut down
- cortisol released into bloodstream, more energy, weakens immune system
- the ability to deal with the initial stressor in this stage increases however resistance to other stressors may decline
Stage 3 - exhaustion
some alarm reaction changes can reappear however body is unable to maintain its resistance and effects can no longer be dealt with
- due to prolonged stress, body’s resources have been depleted and it becomes vulnerable to diseases and mental disorders
- extreme fatigue, high level of anxiety
- ‘wear and tear’ due to immune suppression & prolonged levels of cortisol in the bloodstream as cortisol interferes with body’s ability to fight disease
Strengths - GAS model
- developed understanding and awareness of links between stress and disease
- identifies biological processes associated with stress response