Spinal Cord (CNS)

Description

Spinal Cord Elements
merrittak
Mind Map by merrittak, updated more than 1 year ago
merrittak
Created by merrittak over 8 years ago
131
0

Resource summary

Spinal Cord (CNS)
  1. Blood Supply
    1. Vertebral Arteries
      1. Anterior Spinal Artery (1)
        1. Posterior Spinal Arteries (2)
        2. Segmented Medullary Arteries
          1. Fuses with Spinal Arteries
            1. Artery of Adamkiewicz/ Great Anterior Segmental Artery
              1. Blood Supply to Lower Lumbar and Sacral Region
            2. Radicular Arteries
              1. Doesn't Fuse w/ Spinal Arteries
              2. Internal Vertebral Venous Plexus
                1. Often an avenue of prostate cancer metastisis
                  1. Located in Epidural Fat
                2. Location (2/3 of Vertebral Canal)
                  1. From medulla oblongata
                    1. To Conus Medularis (Tapers Between LV1-LV2)
                  2. Unique traits
                    1. Large Sensory and Motor Inputs= Cervical Enlargement @ C4-T1 Lumbar Enlargement @ T11-L1
                    2. COMPOSTITION
                      1. Gray Matter (nerve cell bodies)- Non-myelinated, inner
                        1. Meninges Covering
                          1. Dura (touch, fibrous connective tissue)
                            1. Arachnoid
                              1. Subdural Space (extends to SV2) on Superior; Subarachnoid Space Inferior (Location of CSF)
                              2. Pia (intimately connected to spinal tissue)
                                1. Denticulate Ligaments (21 Pair)
                                  1. Laterally Anchors Spinal Cord in Subarachnoid Space Transverses Dorsal and Ventral Nerve Roots; Runs From Pia to the Dura
                                  2. Filum Terminale
                                    1. LV2-SV2; inferior prolongation of pia Blends with dura and continues inferiorly to attach to coccyx = coccygeal ligament
                                2. White Matter (Axons)- myelinated, outer
                                3. SPINAL NERVES (31 PAIRS)
                                  1. Union of Doral and Ventral Roots; Located in Intervertebral Foramen
                                    1. 8, 12, 5,5,1
                                      1. Cauda Equina
                                        1. L2-Co1; Dorsal and Ventral Roots of Lumbar and Sacral S.N. In the subarachnoid space/lumbar cystern below the conus Floats freely in CSF, not damaged during LP
                                        2. Dermatome- Area of skin innervated by sensory fibers from a particular spinal nerve
                                          1. Scleratome- area of bone innervated by a single S.N. Segment
                                            1. Myotome- group of muscles innervated by motor fibers derived from a single S.N segment
                                            Show full summary Hide full summary

                                            Similar

                                            The Nervous System and Hormones (Part 1)
                                            Naomi Science
                                            CNS- Spinal Cord - Anatomy PMU Year 1/2nd Semester
                                            Med Student
                                            PMU - 2nd/2t Semester Anatomy - CNS (Spinal Cord)
                                            Sole C
                                            Biopsychology - the Nervous System
                                            Jenny Wright
                                            Spinal Cord Compression
                                            Matthew Coulson
                                            Anatomy of the Back, Spine & Spinal Cord
                                            Matthew Coulson
                                            Spinal Cord and Root Dysfunction
                                            Matthew Coulson
                                            Physiology - Sensory Pathways - CNS
                                            Riki M
                                            14.3 Reflex Arc
                                            Lina Larry
                                            Smegenys
                                            greta.kaluinaite
                                            Physiology - CNS basics
                                            Riki M