The posterior spinal arteries arise from either the posterior inferior cerebellar or vertebral arteries (V3 or V4 segments) and runs the entire posterolateral aspect of the spinal cord. Its origin may be intra-dural or extra-dural 1,2.
Where do the anterior and posterior spinal arteries originate?
The anterior and posterior radicular arteries arise from spinal branches of the vertebral, ascending cervical, deep cervical, intercostal, lumbar and sacral arteries.
What is the origin of radicular artery?
The radicular arteries arise from the division of the radiculomedullary arteries along the anterior and posterior nerve roots. The anterior radicular artery extends along the anterior surface of the spinal cord, while the posterior radicular artery likewise extends along the posterior cord surface.
What is the source of the spinal cord blood supply?
Blood Supply and Lymphatics
The main blood supply to the spinal cord is via the single anterior spinal artery (ASA) and the two posterior spinal arteries (PSA). The anterior spinal artery is formed by the vertebral arteries which originate from the first part of the subclavian artery.
What is a spinal artery?
The anterior spinal artery is the artery that supplies the anterior portion of the spinal cord. It arises from branches of the vertebral arteries and courses along the anterior aspect of the spinal cord. It is reinforced by several contributory arteries, especially the artery of Adamkiewicz.
Where do segmental arteries come from?
The anterior and posterior segmental medullary arteries are derived from the spinal branches of the ascending cervical, deep cervical, posterior intercostal, and lumbar arteries.
Why is the artery of Adamkiewicz important?
The artery of Adamkiewicz is significant in that it is the only major arterial supply supplying the anterior spinal artery along the lower thoracic, lumbar, and sacral segments of the spinal cord.
Can you live without a spinal cord?
The spinal cord is a column of nerves that connects your brain with the rest of your body, allowing you to control your movements. Without a spinal cord, you could not move any part of your body, and your organs could not function. This is why keeping your spine healthy is vital if you want to live an active life.
How many vertebral arteries do you have?
Here’s the vertebral artery. The two vertebral arteries pass through these openings in each vertebra. After passing through the transverse process of the atlas, the artery turns backwards, and then medially, to pass through the atlanto-occipital membrane and the dura, just below the foramen magnum, which is here.