Is a bundle of nerves that is centrally involved in the central nervous system.

The nervous system is an important aspect of human function and movement.

The spinal cord is protected by bone of the vertebral column.

The function of spinal cord is the conduction of impulses from the brain to the peripheral nervous system to extremities and back again.

There are 31 segments of the spinal cord.

Every segment has several nerves that branch out on the left and right sides of the vertebral column.

Nerve types of the spinal cord are divided into 3 categories:

1.) Motor - Ventral
2.) Sensory – Dorsal
3.) Mixed

Cervical Segments
   -   8 segments that for 8 pairs
   -   C1-C8
   -   From distal portion of skull
   -   Forms the neck region

Thoracic Segments
   -   12 segments
   -   T1-T12
   -   From below neck region to mid back

Lumbar Segments
   -   5 Segments
   -   L1-L5
   -   Mid back towards lower back

Sacral Segments
   -   5 Segments
   -   S1-S5
   -   Lower back

Coccygeal Segment
   -   1 Segment