At which level of the spinal column is damage to the spinal cord no longer a concern in regards to a spinal cord injury?

After spinal cord injury, complete anesthesia occurs when more than two spinal levels are damaged.

A fatty substance that covers only the axons is known as:

The structure that is made up of the nerve roots from L2 through S5 is called the:

The spinal cord extends to about what vertebral level?

The two hemispheres of the brain are separated (divided) by what structure?

This structure transmits impulses away from the cell body.  

Which of the following diagnoses is not associated with a lower motor neuron lesion? 

Areas that contain mostly myelinated fibers are called:

The spinal cord runs within the vertebral canal and terminates at this location at approximately the level of the second lumbar vertebra in an adult.