Class 20 Stress ANS and ENS upload

Class 20 Stress ANS and ENS upload - Stress 1: Autonomic...

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Stress 1: Autonomic Nervous System and the Enteric Nervous System Class #20 November 13, 2008 Readings from “Brain Briefings”: Stress and the Brain, Depression and Stress Hormones See also attached Word document on the Enteric Nervous System
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Outline for Lecture on Stress I General discussion of Stress Overview of the autonomic nervous system Example using neural control of the heart and the pathology of “fainting” The Enteric Nervous System – The “Gut’s Brain”
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Biological Stress A “stressor” is anything in the environment that disturbs the equilibrium of the body. Stress response is the array of physiological adaptations that re- establish the balance. Persistent Stress: raises blood pressure raises blood sugar levels suppresses the immune system
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There is stress that permits a physical response - Biological Stress
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And there is stress that does not permit a physical response - Psychological Stress.
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The problem is that our 50,000 year old physiology, great for hunter/gathers, is not suited to 21 st Century problems and sources of stress in an urban and industrialized world.
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Psychological Stress Life is 10% of what happens to you, and 90% of how you react to it. Stress is a consequence of an emotional response to external stimuli. Persistent Stress: produces anxiety may result in depression can affect all organ systems Responses to Biological and Psychological stressors involve complex interactions among hormones and transmitters in the brain and peripheral organs.
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The Limbic System is linked to: learning, memory and emotion
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Prefrontal cortex involved in emotional response to environment
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Biological basis for outlook on life? Emotional response to events in
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Class 20 Stress ANS and ENS upload - Stress 1: Autonomic...

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