Spinal cord

Dr Henry Knipe et al.

The spinal cord is the part of the central nervous system that is found within the central canal of the vertebral column. 

Gross anatomy

It measures approximately 42-45 cm in length, ~1 cm in diameter and 35 g in weight. 

It is divided into cervical, thoracic and lumbar parts and terminates at the conus medullaris at approximately the T12/L1 vertebral body level. 

The spinal cord is segmented by the nerve roots that emerge from it. There are 31 segments in total:

  • 8 cervical
  • 12 thoracic
  • 5 lumbar
  • 5 sacral
  • 1 coccygeal 
Spinal anatomy
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Article Information

rID: 25075
Section: Anatomy
Tag: refs
Synonyms or Alternate Spellings:
  • Spinal cord anatomy

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