Anatomy of the Spinal Cord

Structure of the spinal cord

Tracts of the spinal cord

Spinal cord syndromes

Anatomy of the Spinal Cord

Structure of the spinal cord

Tracts of the spinal cord

Spinal cord syndromes

Won Taek Lee, M.D., Ph.D.

تنظیم و بازنگری :دکتر مهران مرادی رزیدنت جراحی مغز و اعصاب

- Comparable to Input-Output (IO) System of the Computer

- Spinal Nerve (C8, T12, L5, S5, Cx1)

- Segmental Structure of Neural Tube Origin

- Comparable to Input-Output (IO) System of the Computer

- Spinal Nerve (C8, T12, L5, S5, Cx1)

- Segmental Structure of Neural Tube Origin

Spinal CordSpinal Cord

Spinal segment

C8, T12, L5, S5, Cx1

Anterior (Ventral) RootPosterior (Dorsal) Root Dorsal Root (Spinal) Ganglion

Root - Rootlets

Conus Medullaris (L1-2)

Spinomedullary Junction - Foramen Magnum, Pyramidal decussation, C1 ventral root

Enlargements - cervical (C5-T1) & lumbosacral (L1-L4)

Longitudinal Fissures - anterior median fissure - anterolateral fissure - posterior median sulcus - posterolateral sulcus

Conus Medullaris (L1-2)

Spinomedullary Junction - Foramen Magnum, Pyramidal decussation, C1 ventral root

Enlargements - cervical (C5-T1) & lumbosacral (L1-L4)

Longitudinal Fissures - anterior median fissure - anterolateral fissure - posterior median sulcus - posterolateral sulcus

Spinal Cord External Figure Spinal Cord External Figure

Conus Medullaris (L1-2)

Cauda Equina

Anterior median fissureAnterolateral fissure

Posterior median sulcus

Posterolateral sulcus

Posterior intermediate sulcus

Fasciculus cuneatus

Fasciculus gracilis

Posterior surface of the spinal cord

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

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

Spinal Cord Meninges Spinal Cord Meninges

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

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

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

Spinal Cord Vascular Supply Spinal Cord Vascular Supply

anterior spinal artery segmental arteries

5. Adamkiwicz artery