MCQ – 86911

The optic nerve is a tract of the diencephalon that is not completely myelinated until:

Correct Answer � D Explanation

• The axons of the optic nerve are not completely myelinated until 3 months after birth.
• Myelinated axons are normally not found in the retina.
• The optic nerve is not a true peripheral nerve but a tract of the diencephalon; when severed, the optic nerve does not regenerate.
• Myelination in the central nervous system (CNS) is accomplished by oligodendrocytes; oligodendrocytes are not found in the retina.