Home > Neuroanatomy > Blood supply of the spinal cord

Blood supply of the spinal cord


Arterial supply : Supplied by 3 small arteries + feeder arteries

Segmental spinal arteries

ASA and PSA arteries are reinforced by segmental arteries, which enter the vertebral canal through the inter vertebral foramina. These arteries are branches of arteries outside the vertebral column (deep cervical, intercostal and lumbar arteries). Segmental arteries give rise to anterior and posterior radicular arteries.

Feeder arteries

Enter the vertebral arteries and anastomose with the ASA & PSA. The most important feeder artery is the Great anterior medullar artery (GAM) of Adamkiewicz. It arises from the aorta at lower thoracic or upper lumbar vertebral levels. This artery is unilateral. It lies in the left side of most people. It represents the major source of blood to the lower 2/3 of the spinal cord.

Veins of the spinal cord

Drain mainly into the veins of the brain and the venous sinuses via 6 tortuous longitudinal channels. Finally, they drain into the internal vertebral venous plexus.

Advertisements
  1. September 23, 2010 at 16:44

    Interesting, thanks, it helps explain the blood flow in an easy to understand way.

  1. No trackbacks yet.

Leave a Comment

Fill in your details below or click an icon to log in:

WordPress.com Logo

You are commenting using your WordPress.com account. Log Out / Change )

Twitter picture

You are commenting using your Twitter account. Log Out / Change )

Facebook photo

You are commenting using your Facebook account. Log Out / Change )

Google+ photo

You are commenting using your Google+ account. Log Out / Change )

Connecting to %s

%d bloggers like this: