8. ► Does not correspond to the vertebral
level
► Cervical….1 segment
► Upper thoracic….2 seg
► Lower thoracic….3 seg
► Lumbar ….T11 &T12
► Sacral & Coccygeal….L1
21. ► Main source of blood is the Vertebral
arteries……cervical
► Radicular arteries…….spinal br. of
vertebral, asc cervical, deep cervical,
intercostal, lumbar and sacral art
► Arteria radicularis magna
22. DISTRIBUTION OF BLOOD SUPPLY
► Radicular art : grey & white matter
► Anterior spinal : ant two-third
ventral grey matter,part of dorsal grey
matter,ant and lat funiculi
► Posterior spinal : post one-third
posterior horn and posterior funiculus