Which cranial nerve's fibers are myelinated by oligodendrocytes?: (A) I, (B) II, (C) III, (D) VII
Answer is B. The fibers of the optic nerve (CN II) are myelinated by oligodendrocytes. This is an impoant distinction from the Other cranial nerves ( myelinated by Schwann cells) because the optic nerve is considered a tract of the central nervous system