nerve root of the spinal cord.

The spinal cord can be divided into segments according to the nerve roots that branch off of it. Nerves along the cord consists of 8 cervical, 12 thoracic, 5 lumbar, 5 sacral, and 1 coccygeal nerves. The nerve roots run through the bony canal, and at each level a pair of nerve roots exits from the spine.

Cervical spine nerve roots. In the cervical spine (neck), the nerve root is named for the lower segment that it runs between (e.g. C6 nerve root at C5-C6 segment).

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