c l i n i c a l f o l i o s : n a r r a t i v e





A D V E R T I S E M E N T

 

Blood Supply of the Spinal Cord: 4

A D V E R T I S E M E N T

   
 

The most cephalad contributions to the arterial supply of the spinal cord reflect the primitive longitudinal vascular arrangement. Paired branches of the distal vertebral arteries unite in the midline to form the anterior spinal artery. Branches from the more proximal vertebral (occasionally from the posterior inferior cerebellar arteries) continue as the posterior spinal arteries. These vessels are joined by the anterior and posterior radicular vessels along their course.     

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Blood Supply of the Spinal Cord: 5

A D V E R T I S E M E N T

   
 

In the cervical region, persistent intersegmental arterial anastomoses form longitudinal vessels, the vertebral arteries, deep cervical branch of the costocervical trunk, and the ascending cervical branch of the inferior thyroid artery. Each of these contributes to the radicular blood supply of the cervical cord at various levels.      

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Blood Supply of the Spinal Cord: 6

A D V E R T I S E M E N T

   
 

The segmental blood supply to the cord comes from the intercostals in the thoracic region, from the lumbar arteries, and from the lateral sacral arteries. The paired branches course around either side of the vertebral body and continue to the paraspinous muscles of the back. They send a branch through the intervertebral foramina with the spinal nerve. These branches supply the dura within the spinal canal. They send a radicular branch which penetrates the dura around the spinal nerve and reaches the spinal cord.     

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This page was last modified on 7/3/2001.