Science of Stress

Science of Stress - To understand the stress response we must process a fundamental knowledge not only of psychology but of physiology as well

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To understand the stress response, we must process a fundamental knowledge not only of psychology but of physiology as well.” —George Everly
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Psychophysiology Psychophysiology is a term to describe the body’s physiological reaction to perceived stressors suggesting that the stress response is a mind-body phenomenon.
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Psychophysiology of Stress The Brain - cerebral cortex & subcortex [cerebellum, medulla oblongata, pons, & diencephalon] -perception & translation = brain instructs body & systems how to adjust - anatomy of the brain - Diencephalon = Thalamus & Hypothalamus = “seat of emotions” Endocrine System - hypothalamus delivers message to ES to initiate stress hormones - epinephrine & norepinephrine, cortisol which carry specific message (fight or flight)
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The Brain Two major components Cerebral cortex (thinking functions) Subcortex (physiological processes)
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The Brain Hippocampus (sounds the stress alarm) Cerebellum (coordinates body movement) Pons (regulates sleep) Medulla oblongata (heart beat, respiration)
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The Nervous System Can Be Divided Into: The central nervous system (CNS) brain spinal cord The peripheral nervous system (PNS) consists of all neural pathways to the extremities (sympathetic and parasympathetic)
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Peripheral Nervous System Consists of the sensory and motor nerves Carry sensations such as smell, touch, heat, and sound from the body to the brain and the spinal cord
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- involuntary actions [digestion, heart rate, blood pressure, body temp] - controlled by hypothalumus (in diencephalon responsible for emotions) - key role = when receives message from higher-order thinking part, like an alarm,
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This note was uploaded on 10/25/2010 for the course PHED 160 at USC.

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Science of Stress - To understand the stress response we must process a fundamental knowledge not only of psychology but of physiology as well

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