Optic Nerve (CN II)

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.