The intracranial portion of the optic nerve lies in which location?

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Prepare for the NBEO Ocular Anatomy Posterior Segment and Cranial Nerves Test. Study with flashcards and multiple choice questions, each question has hints and explanations. Get ready for your exam!

Multiple Choice

The intracranial portion of the optic nerve lies in which location?

Explanation:
The optic nerve is organized into several segments as it travels from the eye toward the brain, and the part that lies within the cranial cavity is the intracranial portion. This segment runs from the end of the optic canal to the optic chiasm, traveling in the subarachnoid space and surrounded by meninges. That place is inside the skull, i.e., within the cranial cavity. The other parts—inside the eyeball, in the orbit, or within the optic canal—correspond to the intraocular, intraorbital, and intracanalicular portions, respectively.

The optic nerve is organized into several segments as it travels from the eye toward the brain, and the part that lies within the cranial cavity is the intracranial portion. This segment runs from the end of the optic canal to the optic chiasm, traveling in the subarachnoid space and surrounded by meninges. That place is inside the skull, i.e., within the cranial cavity. The other parts—inside the eyeball, in the orbit, or within the optic canal—correspond to the intraocular, intraorbital, and intracanalicular portions, respectively.

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