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Stress & Health The interplay between mind, body and disease
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Stress Process by which we perceive and respond to events appraised as threats or challenges –Ongoing process –Subjective & depends on appraisals ‘Good’ events appraised as threats ‘Bad’ events appraised as challenges
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Stress
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Stress can lead to (associated with): – Psychological effects such as anxiety and fear – Physiological effects such as activation of ANS & impairment of immune system – Behavioral effects such as coping Appraisals key for these effects – Interpretation of event w/ respect to goals & well being
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Stress Appraisals
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Stressors Stressors are environmental or psychological events that can produce stress – No objective stressors – All depends on how event is appraised –Different appraisals of same event lead to different responses (stress levels)
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Stress Appraisals
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CNS, Endocrine System & Stress
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Stress Appraisals Arousal level depends on appraisals
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General Adaptation Syndrome Selye - bodies pass through three stages dealing with stress 1.) Initial alarm stage: metabolism speeds up as the body mobilizes to fight stress 2.) Resistance stage: arousal becomes more moderate but is sustained 3.) Exhaustion stage: prolonged stress leads to exhaustion of bodily resources
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GAS
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Sources of Stress Life Events – Catastrophes: Earthquake – Life changes: Marriage or job change – Daily hassles: Traffic jams, exams, taxes, busy Optimism-Pessimism – Impacts appraisals & stress related illness
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Optimism & Health
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Sources of Stress Control – Low appraised control can be stressful – Perception key (The Brain Module 22 video)
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Stress & Heart Disease Type A v Type B –As - competitive, hard driving, impatient, angry –Bs - easygoing, relaxed Anger & hostility is core –Differ on: Life style (smoking, sleep, caffeine) Physiologically reactivity under stress Heart disease
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CNS, Stress & Immune Function Functional & structural association between CNS & Immune System –CNS hormones impact immune organs –Immune cells have receptors for adrenaline Stress occurs in CNS –Impacts immune functioning
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Stress & Immune System Divorce/depression/test anxiety decreases circulating antibodies –Slows macrophages and NK cells Stress increases circulating cortisol Cortisol prevents immune cell reproduction Stress impairs immune function
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Stress & Immune System Common Cold
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Stress & Disease AIDS –Stress speeds progression of AIDS Cancer –Stress (probably) speeds tumor growth and death
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Promoting Health Coping –Emotion-Focused: Reduce emotional effects of stressors Escape-Avoidance: Avoid dealing with stressor –Problem-Focused: Attempts to terminate or attenuate stressor Studying –Best used in combination
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Promoting Health Coping –Aerobic exercise reduces stress & depression Increases overall health (heart, blood pressure) Increases lifespan (~ 2 years) Quality of life better –Biofeedback & relaxation techniques (see text)
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Promoting Health Social Support –Family ties & close interpersonal relationships Marriage Friends –Decreased risk for morbidity and mortality Risk level comparable to smoking cigarettes Need to belong
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Promoting Health Why does social support promote health? –Life style & medical care –Positive appraisals and coping of stressors –Enhance immune function, reduce CVR –Emotional disclosure Confiding past traumas improves health –Satisfies need to belong Control for above and relationship remains
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Promoting Health Spirituality & faith communities associated with lower mortality risk –Reduces mortality risk comparable to NOT smoking (women) and exercising
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Promoting Health
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Why does spirituality & faith communities promote health?
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Reaction Paper IV: Stress Summarize how stress is linked to disease and illness. List at least 2 ways you can reduce the stress in your life PLEASE TURN THESE IN AFTER CLASS!
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Summary: Stress and Illness Appraisals Stressors & GAS Vs Impacting on stress Stress & disease Promoting health
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