Vascular Diseases Of The Spinal Cord

Posterior spinal

artery

Posterior radicular artery

Anterior spinal artery

Segmental artery

Rich anastomotic network occurs between each segmental artery through the vertebral body and across the extradural space

Posterior spinal artery territory

- Posterior one-third of spinal cord.

- Dorsal column.

♦---Virtually no anastomotic communication.

- Anterior spinal artery territory

Penetrating branches - anterior and part of posterior grey matter.

Circumferential branches - anterior white matter. - Anterior two-thirds of spinal cord.

Most radicular vessels only supply the /root. On average 12 posterior radicular branches and 8 anterior radicular branches supply the spinal cord.

Atherosclerosis of spinal arteries is rare. When infarction occurs in the anterior spinal artery territory it is often a consequence of disease in the vessels of origin of the segmental arteries, i.e. atheroma or dissection of the aorta.

Anterior radicular artery artery

Posterior radicular artery

Anterior spinal artery

Segmental artery

Rich anastomotic network occurs between each segmental artery through the vertebral body and across the extradural space

Section through spinal cord in thoracic region.

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