Spinal cord

Spinal cordIn the spinal cord, the nerve fibres and the perikarya of the afferent and efferent nerve cells of the CNS are located. It is formed in segments. From cranially to caudally, it is divided into:

Cervical cord (Pars cervicalis medullae spinalis): segments C1 to C8

Thoracic cord (Pars thoracalis medullae spinalis): segments Th1 to Th12

Lumbar cord (Pars lumbalis medullae spinalis): segments L1 to L5

Sacral cord (Pars sacralis medullae spinalis): segmente S1 to S5

The coccygeal cord (Pars coccygis medullae spinalis) of the human is formed just rudimentally. It is represented with one segment (Co1).In one section of the cervical and lumbar cord, the spinal cord shows a macroscopically visible increased thickness that is caused by the higher density of nerve cells in this area. The two sections are called Intumescentia cervicalis and Intumescentia lumbosacralis.