Chapter 5: Nervous System
Chapter 5: Nervous System PSY 462
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This 2 page Class Notes was uploaded by Bailee Zemlock on Friday September 11, 2015. The Class Notes belongs to PSY 462 at Arizona State University taught by Dr. Luecken in Summer 2015. Since its upload, it has received 64 views. For similar materials see Health Psychology in Psychlogy at Arizona State University.
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Date Created: 09/11/15
Chapter 5 Nervous System September 8 2015 Nervous System takes the information from the environment processes it and tells the body how to react Includes cells chemicals the central nervous system and the peripheral nervous system 0 Central Nervous System 9 brain and spinal cord 0 Peripheral Nervous System 9 somatic nervous system skin and muscles and autonomic nervous system organs temperature sympathetic nervous system parasympathetic nervous system Sympathetic activation Fight or Flight Immediate response Mobilize body for ACTION Raise blood pressure and heart rate 0 Increase breathing o Dilate pupils Constrict peripheral blood vessels good so you don t bleed a lot if attacked Suppress immune system if you have a u your body doesn t need to be fighting the u virus it needs to be fighting the person Decrease salivary secretion yay who wants to drool during an attack anyways Reduced digestive activity Parasympathetic Nervous System Relaxation sleep sexual arousal Dominates under normal conditions Opposing effects of sympathetic nervous system Faster response than sympathetic nervous system Functions like a quotbrakequot for the body Neuroendocrine System produces hormones Brain and endocrine system work together to regulate stress response Sympathetic Adrenal Medullary SAM System s pathway Brain Cerebral cortex 9 hypothalamus 9 amygdala Neurotransmitters produce Epinephrine and Norepinephrine Body Adrenal cortex 9 adrenal Medulla Hormones produce Epinephrine and Norepinephrine Hypothalamic Pituitary Adrenal HPA System Cerebral Cortex and amygdala 9 Hypothalamus 9 Pituitary gland 9 Adrenal cortex 9 adrenal medulla Also makes epinephrine and norepinephrine Slower 10 minutes and longer 45 minutes response Mobilizes glucose sugar your body needs for energy in your muscles Increase cholesterol Move stored energy towards muscles Chapter 5 Nervous System September 8 2015 Continue elevating BP and HR Suppress nonessential at the moment functions 0 Suppress gonadal function 0 Suppress digestion o Suppress secretion of growth hormones Cortisol sends signals back to brain to stop producing Cortisol for the time being Evolution of the stress response Primitive Humans Stress for current threats related to survival Had to defend territory more than today s civilized society Humans with better stress responses survived to reproduce If you did not have a great response you did not survive an attack Modern Humans Stress is chronic psychological and for long periods of time Slowly accumulates stress damage Long term risks 0 Allostatic Load dysregulated stress responses Decreasing psychological health cognitive decline Unhealthy behaviors Infertility Physical health risks 9 heart disease u diabetes Higher risk of early mortality 00000 How do we measure stress physically Take blood pressure Measure heart rate Galvanic skin responses Respiration rate Cortisol levels Norepinephrine and epinephrine Blood samples hair samples Advantage It s objective Can t hide the stress Disadvantage You might not feel stressed but your cortisol went up on the test Hard to compare between two people because everyone s blood pressure hair samples etc are different It s costly We can also have people selfreport measures of stress from 1 Life Events see scale in book a Scale is not accurate because people respond differently to all events 2 Daily Hassles see scale in book 3 Perceived Stress see scale in book a Does not ask specifically about stress but other relative questions that add up to a stress numberquot