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George E. Carvell, PhD, PT   University of Pittsburgh
 
SPINAL CORD: ARTERIAL BLOOD SUPPLY I
The ASA is fed by the vertebral arteries in the upper cervical cord and then by 6-8 medullary arteries that are branches segmental arteries of the aorta for the rest of the cord. The PSAs are fed by the vertebral arteries in the upper cervical cord and caudally by the posterior medullary arteries at irregular intervals. The arterial vasacorona is fed by the anterior & posterior radicular & spinal arteries at each level. The spinal roots are fed by the radicullar arteries. Remember these relationships between the arterial blood supply & gray/white
Haines Fig 2-3 p 11
matter structures.