The peculiarities of optic nerve

The peculiarities of optic nerve

1.      It is not a peripheral nerve but a prolongation of white matter of the brain

2.      Peripheral neuropathies like Guillain–Barré syndrome do not affect the optic nerve.

3.      the epineurium, perineurium, and endoneurium found in peripheral nerves but not is optic nerve

4.      optic nerve are incapable of regeneration, and, hence, optic nerve damage produces irreversible blindness..

5.      It is  covered by three meninges of brain with subdural and subarchnoid spaces

6.      Myelination of the optic nerve is derived from the oligodendrocyte and not from the Schwann cells

7.      Plial sheath projects into the substances of the nerve as numerous septa.

8.      The subject of the blood supply of the optic nerve. The circulation of the posterior ciliary artery is the main source of blood supply to the optic nerve, except for the surface nerve fiber layer which is supplied by the retinal circulation.