Optic Nerve (CN II)

by Darren Salmi, MD, MS

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    00:01 Cranial nerve II or the optic nerve is going to be responsible for vision.

    00:07 As we can see here, it's going to start in the eye where the retina is going to coalesce at something called an optic disc.

    00:13 And that will exit the eye posteriorly.

    00:17 Some of its fibers will cross, it's something called the optic chiasm.

    00:21 And then it will continue posteriorly as an optic track.

    00:26 At which point it will have some connections at this area called a lateral geniculate body before finally continuing on as an optic radiation into the occipital lobe of the cerebrum, where vision will be processed.

    00:39 If there's damage at certain portions of this pathway, certain types of visual loss will be produced.

    00:47 In fact, a careful examination of visual field loss will help narrow down the location of pathology along these optic pathways.

    About the Lecture

    The lecture Optic Nerve (CN II) by Darren Salmi, MD, MS is from the course Neurovasculature of the Head.

    Included Quiz Questions

    1. Optic chiasm
    2. Optic disc
    3. Optic tract
    4. Right optic nerve
    5. Left optic nerve

    Author of lecture Optic Nerve (CN II)

     Darren Salmi, MD, MS

    Darren Salmi, MD, MS

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