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: 7

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

   
 

Around the vertebrae, limited longitudinal anastomoses are found anterolaterally, posterolaterally and posteriorly.       

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Blood Supply of the Spinal Cord: 8

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

   
 

Radiculopial arteries join the posterior spinal arteries and the pial plexus, but do not provide major penetrating branches into the spinal cord substance. Radiculomedullary arteries join the anterior spinal artery and send branches into the ventral sulcus and into the cord substance. A large radiculomedullary artery (of Adamkiewicz) is usually found at the lumbar enlargement (T9-T12).      

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Blood Supply of the Spinal Cord: 9

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

   
 

The longitudinal anterior spinal artery and its transverse radiculomedullary feeders are the dominant blood supply to the cord. The anterior spinal artery may be discontinuous, particularly in the thoracic area. Sulcal branches of the anterior spinal artery penetrate the cord in the depth of the sulcus and each artery goes to one side only. At the spinal enlargements, the sulcal arteries supply as much as the anterior 50% of the cord section, while in the thoracic region, they supply only 15-20%. Ascending branches of the sulcal arteries form intrinsic anastomoses. The pial network surrounds the cord, and sends fine radial branches into the white matter of the spinal cord tracts. Some branches penetrate along the dorsal nerve roots and enter the posterior gray horns to anastomosis with transverse branches of the sulcal arteries.    

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