Outline 15 Stress and Post Traumatic Stress Disorder

Outline 15 Stress and Post Traumatic Stress Disorder -...

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Outline 15 Stress and Post Traumatic Stress Disorder (PTSD) Book Chapter Readings for this Outline: Chapter 17, Sections 17.3-17.5 I. Stress is both good and bad Good o Increased energy and attention in response to emergencies or urgent situations e.g., enhanced performance during tests Bad o Effects of severe and/or chronic stressors And onslaught of several stressors at once e.g., war, famine, death, abuse, lack of control in high pressure situations II. Seyle’s General Adaptation Syndrome: Alarm o Heightened activation of sympathetic nervous system--> Increased epinephrine (adrenalin) and norepinephrine o Hypothalamus releases corticotropin releasing hormone (CRH) --> Pituitary releases adrenocorticotropic hormone (ACTH) --> Adrenal glands secrete glucocorticoids --> widespread effects in brain and body o Glucocorticoid receptors are found in the brain and are particularly abundant in the hippocampus Resistance o Body resources are mobilized to deal with and terminate the stressor i.e., flight or fight response o In a normal stress response, the individual returns to normal after the resistance stage. With unrelieved stress, the body enters stage 3. Exhaustion o anxiety, major disruption of bodily and brain systems, possible death Chronic stress is related to several health problems: Heart disease, Diabetes, Ulcers, Growth problems, Compromised immune system Stress and the cardiovascular system o During stress there is: Increased heart rate (blood moves faster and with more force) Constriction of major arteries (like a garden hose) increased blood pressure o Short-term consequences Facilitates fight-or-flight response Adaptive for the survival of the species o Long-term consequences- heart disease How does chronic stress heart disease? Blood vessels more to prone to damage due to increased blood pressure
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This note was uploaded on 05/05/2008 for the course PSY 43950 taught by Professor Jones during the Spring '08 term at University of Texas.

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Outline 15 Stress and Post Traumatic Stress Disorder -...

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