True about spinal cord:
A. in adults spinal cord ends at lower border of L1 vertebraB. in newborn may extend up to L3
C. Cauda equina extends from lumbar vertebra to coccyx
D. In embryonic period cord extends up to coccyx
E. It has same diameter all throughout the length.
Answer. A. In adult
spinal cord ends at lower border of L1; (B) In newborn may extend up to L3; (C)
Cauda equina extends from lumbar vertebra to coccyx; (D) In embryonic period
cord extends up to coccyx.
• Spinal cord extends from the level of
upper border of atlas to the lower border of L1 or upper border of L2
vertebra .it is about 45cm long
• It has 31 pairs
of spinal nerves.
• Below the lower end of spinal cord
the roots form a bundle known as cauda equina
• The spinal cord first extends
throughout the length of vertebral canal. Subsequently, recession of spinal
cord occurs so that at full term lower
end of spinal cord is at level of L3 vertebra.
Adult lower
end of spinal cord is at level of L1 vertebra
