stress Flashcards
who described
fight or flight response
Walter B Cannon
who discovered general adaptation sydrome
Hans Seyle
What’s the General Adaptation Syndrome
Enlargement of adrenal gland
Decreased lymphocyte levels
Development of bleeding ulcers
Concluded that physiological stress impairs ability to resist future stressors
3 stages of the GAS
- alarm
- adaptation
- exhaustion (allostatic overload)
Alarm stage
stressor triggers HPA response, SNS
arousal body’s defence
Resistance/Adaptation stage
Adrenal Hormones
Fight or flight
Exhaustion stage (allostatic overload)
when stress continues and adaptation is unsuccessful
stress-related disorders
Allostasis
“Stability through change”
adaptation stage
____ secretes CRH
Hypothalamus
____ release ACTH
Pituitary
______secrete cortisol and catecholamine
Adrenals
catecholamine is secreted by which part of adrenals
adrenal medulla
catecholamine includes
epinephrine and norepinephrine
Stress–age syndrome
- Excitability changes in the limbic system and hypothalamus
- Increased catecholamines, ADH, ACTH, and cortisol
- Decreased testosterone, thyroxine, and other hormones
- Immunosuppression and pattern of chronic inflammation
- Alterations in lipoproteins
- Hypercoagulation of the blood
- Free radical damage of cells
What’s PTSD
A pathologic stress response to a memory
Considered a mental illness
Causes intrusive symptoms such as re-experiencing the traumatic event
Many people have vivid nightmares, flashbacks and intrusive thoughts
Includes physical brain changes