Spinal nerve roots are more susceptible to compression injury than peripheral nerve tissue because of the anatomic variation that spinal nerve roots demonstrate no epineurium or perineurium connective...

Spinal nerve roots are more susceptible to compression injury than peripheral nerve tissue because of the anatomic variation that spinal nerve roots demonstrate no epineurium or perineurium connective tissue.

Anatomically, veins demonstrate more connective tissue than arteries, rendering veins less "elastic" than arteries.