BB Chapter 13 Fall 2019.pptx - COLLEGE PHYSICS ANATOMY PHYSIOLOGY Chapter Chapter Title PowerPoint Image Slideshow CHAPTER 13 ANATOMY OF NERVOUS SYSTEM

BB Chapter 13 Fall 2019.pptx - COLLEGE PHYSICS ANATOMY...

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COLLEGE PHYSICS Chapter # Chapter Title PowerPoint Image Slideshow ANATOMY & PHYSIOLOGY CHAPTER 13 ANATOMY OF NERVOUS SYSTEM
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SECTIONS COVERED 13.2 – The Central Nervous System 13.3 – Circulation in the Central Nervous System (CSF) 13.4 – Peripheral Nervous System Visualizing the Brain Brain Function
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ORGANIZATION OF THE NERVOUS SYSTEM Central Nervous System Autonomic Nervous System (chapter 15) Sympatheti c Parasympathetic Somatic Nervous System (chapter 14) Sensory Motor Brain Spinal Cord Periphera l Nervous System
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PROTECTION FOR THE CNS Cranium and Meninges Cerebrospinal Fluid Blood Brain Barrier
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CRANIUM AND MENINGES Bone and membranes surrounding the brain provide physical protection
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CEREBROSPINAL FLUID Bathes CNS via the ventricles (lateral ventricles, third and fourth ventricle), the subarachnoid space and central canal Secreted by ependymal cells of the choroid plexus Functions o Physical protection – buoyancy within the CSF protects brain from trauma o Chemical protection – CSF composition provides optimum cellular environment Similar to plasma o Circulation – exchange of nutrients, waste products
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BLOOD BRAIN BARRIER CNS protected from toxins, hormones, and some neurotransmitters Substances that can pass include gasses (O 2 and CO 2 ), lipid soluble substances (steroids, alcohol), water Tight junctions between endothelial cells regulate movement of substances from blood to brain Brain capillaries are surrounded by foot processes created by astrocytes; these “feet” are highly selective
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Abbott NJ et al. (2006) Astrocyte–endothelial interactions at the blood–brain barrier Nat. Rev. Neuro. 7: 41–53 doi:10.1038/nrn1824 Figure 3 Pathways across the blood–brain barrier. Blood Brain Barrier
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ORGANIZATION OF THE NERVOUS SYSTEM Diagram from Basicmedical Key , Chapter 11, Nervous System. Web. June 2017. ervous-system-2/
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SPINAL NERVES Diagram from Basicmedical Key , Chapter 11, Nervous System. Web. June 2017. Each region of spinal cord (8 cervical, 12 thoracic, 5 lumbar, 5 sacral, 1 coccygeal) divided into: Segments give rise to pairs of spinal nerves which provide the connections for sensory perception and motor output
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SPINAL CORD – TRANSMITS INFO BETWEEN BODY AND BRAIN Figure 13.14 LM × 40. (Micrograph provided by the Regents of University of Michigan Medical School © 2012)
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  • Fall '16
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