Copy Right- Hongqi ZHANG-Departi Anatomy University Relationship of SC Segments to Vertebrae At birth The inferior ends is below at the lower border of l 1 in adult at birth at level of l3 usually a little lower in female than in male But each spinal nerve Sc inf. end is have to come out from At the level of their corresponding L 1 at adult intervertebral foramina Sc inf end is highe Than that of canal Copy Right- Hongqi ZHAN After 3rd month Anton At bir niversity
Copy Right‐ Hongqi ZHANG‐Department of Anatomy‐Fudan University Copy Right‐ Hongqi ZHANG‐Department of Anatomy‐Fudan University Relationship of SC Segments to Vertebrae At birth The inferior ends is below at the lower border of L1 in adult;at birth at level of L3, usually a little lower in female than in male. But each spinal nerve have to come out from their corresponding intervertebral foramina. After 3rd month At birth Sc inf. end is higher Than that of canal Sc inf. end is At the level of L 1 at adult L3
Relation of Spinal nerve roots to vertebrae dan University C1- C1 spin al nerve exis above C1 C3 nical Thoracic nerves Lumbar enlargement onus medullaris dte mination of spinal cord) More high leve Cauda·qui More almost horizent Internal terminal filum (pial part More lower leve/ntal More obliquity Extern al teminal filum(dural Pa Termination of dural sac udan University
Copy Right‐ Hongqi ZHANG‐Department of Anatomy‐Fudan University Copy Right‐ Hongqi ZHANG‐Department of Anatomy‐Fudan University More high level More almost horizental. More lower level More obliquity
Relationship of SC Segments to Vertebral Numbers Spinal segments Vertebral levels(spines) Upper cervical region(C1-C4) Lie opposite the corresponding vertebrae Lower cervical and upper One lower in number than corresponding thoracic region(C5-8: T1-4)vertebrae Middle thoracic region(T5-T8) Two lower in number than corresponding vertebrae Lower thoracic region(T9-T12) Three lower in number than corresponding vertebrae Lumber segments T10~T12 Sacral and coccygeal segments L1
Relationship of SC Segments to Vertebral Numbers Spinal segments Vertebral levels (spines) Upper cervical region (C1~C4) Lie opposite the corresponding vertebrae Lower cervical and upper thoracic region (C5~8；T1-4) One lower in number than corresponding vertebrae Middle thoracic region (T5~T8) Two lower in number than corresponding vertebrae Lower thoracic region (T9~T12) Three lower in number than corresponding vertebrae Lumber segments T10~T12 Sacral and coccygeal segments L1
Relationship of SC Segments to Vertebral Numbers Spinal segments Vertebral levels(spines) Upper cervical region(C1-C4) C1~C4 Lower cervical and upper thoracic -1=C4-T3 region(C5-8; T1-4) Middle thoracic region (T5-T8)-2=T3-T6 Lower thoracic region(T9-T12)-3=T6-T9 Lumber segments T10~T12 Sacral and coccygeal segments =L1
Spinal segments Vertebral levels (spines) Upper cervical region (C1~C4) = C1 ~ C4 Lower cervical and upper thoracic region (C5-8；T1~4) －1 = C4 ~ T3 Middle thoracic region (T5~T8) －2 = T3 ~ T6 Lower thoracic region (T9~T12) －3 = T6 ~ T9 Lumber segments = T10 ~ T12 Sacral and coccygeal segments = L1 Relationship of SC Segments to Vertebral Numbers
Internal structure of spinal cord ◆1- Gray matter c◆2- White matter 3- reticular formation C-cervical: T-tharacic: L-lumbar: S-sacral Central canal
Internal structure of spinal cord 1 - Gray matter 2 - White matter 3 – reticular formation 1 2 S 3 L T C C‐cervical;T‐tharacic;L‐lumbar;S‐sacral Central canal