Chapter 5- Stress Disorders - CHAPTER5:STRESSDISORDERS

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CHAPTER 5: STRESS DISORDERS Stress has 2 components: stressor and stress response Stress reactions r a big part of psychological disorders Stress has been linked to: depress, schizo, sexual dysfunction, anxiety Physchophysiological disorders- physical stress disorders Hypothalamus- the area of brain where the features of arousal and fear are set in  motion, activates 2 systems: autonomic nervous system and  endocrine system Autonomic Nervous System (ANS) - connects CNS to all other organs of the body,  controls involuntary movements (heartbeat,  breathing, etc); builds body up Endocrine System- network of gland throughout body Sympathetic Nervous System- group of ANS fibers that work to quicken our heartbeat  and produce other changes we experience  Adrenal glands- located on top of the kidney Adrenal medulla- area on top of adrenal glands, releases epinephrine (adrenaline) and  norepinephrine (nordrenaline) Parasympathetic Nervous System (PNS) – helps body return to normal 2 ways our body can create a fear reactions
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1. 2. Hypothalamic-pituitary-adrenal (HPA) pathway HPA Pathway-  1. Hypothalamus signals pituitary gland to release adrenocorticotropic  hormone (ACTH)-  a. ACTH- major stress hormone 2.   ACTH stimulates part of adrenal glands called adrenal cortex 3. Adrenal cortex releases corticosteroids – cortisol  Trait Anxiety- a person’s general level of arousal and anxiety  The event in question usually involves actual or threatened serious injury  to self, family member or friend The situations that cause acute or PTSD are events that would cause the  same reactions in anyone Most cases of acute turn into PTSD Acute Stress Disorder- symptoms being within 4 weeks of event and last for less than a  month PTSD- symptoms continue longer than a month, symptoms may show immediately or  take years Similar symptoms of both acute and PTSD
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o Reexperiencing the traumatic event o Avoidance o Reduced Responsiveness Dissociation- psychological separation o Increased arousal, anxiety and guilt WHAT TRIGGERS A PSYCHOLOGICAL STRESS DISORDER? 3.5% = Americans experience stress disorders in a given year 7% = Americans suffer from it at least once in their lifetime 66.6% = Americans who seek treatment Women r 2x more than men 20% = gain stress disorder when in serious situation - women 8% = gain stress disorder when in serious situation – men C COMBAT STRESS DISORDERS 29% = all vets of Vietnam suffered acute or PTSD
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This note was uploaded on 03/04/2010 for the course PSYCHOLOGY 031 taught by Professor Summons during the Fall '08 term at Kirkwood Community College.

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Chapter 5- Stress Disorders - CHAPTER5:STRESSDISORDERS

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