Anatomy of the Spinal Cord Structure of the

Anatomy of the Spinal Cord Structure of the spinal cord v Tracts of the spinal cord v Spinal cord syndromes Won Taek Lee, M. D. , Ph. D. ﺩکﺘﺮ ﻣﻬﺮﺍﻥ ﻣﺮﺍﺩی ﺭﺯیﺪﻧﺖ ﺟﺮﺍﺣی ﻣﻐﺰ ﻭ ﺍﻋﺼﺎﺏ : ﺗﻨﻈیﻢ ﻭ ﺑﺎﺯﻧگﺮی

Spinal Cord - Comparable to Input-Output (IO) System of the Computer - Spinal Nerve (C 8, T 12, L 5, S 5, Cx 1) - Segmental Structure of Neural Tube Origin

Spinal segment C 8, T 12, L 5, S 5, Cx 1 Anterior (Ventral) Root Posterior (Dorsal) Root Dorsal Root (Spinal) Ganglion Root - Rootlets

Spinal Cord External Figure Conus Medullaris (L 1 -2) Spinomedullary Junction - Foramen Magnum, Pyramidal decussation, C 1 ventral root Enlargements - cervical (C 5 -T 1) & lumbosacral (L 1 -L 4) Longitudinal Fissures - anterior median fissure - anterolateral fissure - posterior median sulcus - posterolateral sulcus

Conus Medullaris (L 1 -2) Cauda Equina Anterior median fissure Anterolateral fissure

Posterior median sulcus Posterolateral sulcus Posterior intermediate sulcus Fasciculus cuneatus Fasciculus gracilis Posterior surface of the spinal cord

Spinal Cord Meninges Periosteum of Vertebra - Epidural Space --------- epidural anesthesia Dura Mater Spinalis Arachnoid Membrane - Subarachnoid Space ---- Lumbar Puncture Spinal Anesthesia Pia Mater Spinalis - Denticulate Ligament ----- Cordotomy - Filum Terminale

Meninges of the spinal cord • Dura mater • Arachnoid membrane • Pia mater Denticulate ligament - specilization of the pia mater - landmark for cordotomy

Meninges of the spinal cord

Meninges of the spinal cord

Lumbar Puncture – lumbar (terminal) cistern

Spinal Cord Vascular Supply Arterial Supply - Spinal Arteries Anterior (1) & Posterior (2) Spinal Artery from Vertebral artery - Radicular Arteries ----- Segmental arteries from Vertebral, Ascending Cervical, Intercostal and Lumbar Artery Venous Drainage - Longitudinal & Radicular Veins to Intervertebral veins ---- to Internal Vertebral Venous Plexus to external vertebral venous plexus ---- to segmental veins

5. Adamkiwicz artery anterior spinal artery segmental arteries