Knight's Anatomical Atlas of Spinal Cord and Spinal Nerves

 

The spinal cord extends caudally through the foramen magnum and connects to the medulla oblongata .
Neck enlargement and lumbosacral enlargement reflect the innervation of the limbs .
The medullary cone is located below L1 .
In the process of growth and development, the spine grows faster than the spinal cord, resulting in the adult's spinal cord ending position higher than that of the infant, and the related nerve roots have to travel a longer distance in the spinal canal to reach the corresponding vertebral foramen .
Nerve roots gather in the lumbar cistern to form a cauda equina, and the lumbar cistern can reabsorb the cerebrospinal fluid .
The filament ends at the tailbone on the caudal side of the spinal cord .

General anatomy of the spinal cord (in-situ image)

 

The pia mater is close to the surface of the spinal cord, and the arachnoid membrane covers the outside of the spinal cord and is attached to the dura mater.

It is a relatively hard fibrous protective film

The pia mater is close to the surface of the spinal cord, and the arachnoid membrane covers the outside of the spinal cord and is attached to the dura mater.
It is a relatively hard fibrous protective film

Back view 

Front view

 

 

 

Correspondence between spinal nerve roots and vertebrae 

A herniated lumbar intervertebral disc usually does not compress the spinal nerves that leave the spinal canal through the upper part
.

The intervertebral disc between the 4th and 5th lumbar vertebrae protrudes backward and outward, compressing the 5th lumbar nerve instead of the 4th lumbar nerve

The intervertebral disc between the 4th and 5th lumbar vertebrae protrudes backwards, which rarely compresses the 4th lumbar nerve, mainly the 5th lumbar nerve, and sometimes can simultaneously compress the 1st to 4th sacral nerves

 

 

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