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Open in TheBrain

Optic Nerve

<span style="font-family: -apple-system, BlinkMacSystemFont, &quot;Segoe UI&quot;, Roboto, Lato, Helvetica, Arial, sans-serif;">The&nbsp;</span><span style="margin: 0px; padding: 0px; border: 0px; font-variant-numeric: inherit; font-variant-east-asian: inherit; font-weight: 700; font-stretch: inherit; line-height: inherit; font-family: -apple-system, BlinkMacSystemFont, &quot;Segoe UI&quot;, Roboto, Lato, Helvetica, Arial, sans-serif; vertical-align: baseline;">optic nerve</span><span style="font-family: -apple-system, BlinkMacSystemFont, &quot;Segoe UI&quot;, Roboto, Lato, Helvetica, Arial, sans-serif;">, also known as&nbsp;</span><span style="margin: 0px; padding: 0px; border: 0px; font-variant-numeric: inherit; font-variant-east-asian: inherit; font-weight: 700; font-stretch: inherit; line-height: inherit; font-family: -apple-system, BlinkMacSystemFont, &quot;Segoe UI&quot;, Roboto, Lato, Helvetica, Arial, sans-serif; vertical-align: baseline;">cranial nerve II</span><span style="font-family: -apple-system, BlinkMacSystemFont, &quot;Segoe UI&quot;, Roboto, Lato, Helvetica, Arial, sans-serif;">, or simply as&nbsp;</span><span style="margin: 0px; padding: 0px; border: 0px; font-variant-numeric: inherit; font-variant-east-asian: inherit; font-weight: 700; font-stretch: inherit; line-height: inherit; font-family: -apple-system, BlinkMacSystemFont, &quot;Segoe UI&quot;, Roboto, Lato, Helvetica, Arial, sans-serif; vertical-align: baseline;">CN II</span><span style="font-family: -apple-system, BlinkMacSystemFont, &quot;Segoe UI&quot;, Roboto, Lato, Helvetica, Arial, sans-serif;">, is a paired&nbsp;</span><a href="https://en.wikipedia.org/wiki/Cranial_nerve" title="Cranial nerve" class="mw-redirect" style="margin: 0px; padding: 0px; border: 0px; font-variant-numeric: inherit; font-variant-east-asian: inherit; font-stretch: inherit; line-height: inherit; font-family: -apple-system, BlinkMacSystemFont, &quot;Segoe UI&quot;, Roboto, Lato, Helvetica, Arial, sans-serif; vertical-align: baseline; color: rgb(107, 75, 161);">cranial nerve</a><span style="font-family: -apple-system, BlinkMacSystemFont, &quot;Segoe UI&quot;, Roboto, Lato, Helvetica, Arial, sans-serif;">that transmits&nbsp;</span><a href="https://en.wikipedia.org/wiki/Visual_system" title="Visual system" style="margin: 0px; padding: 0px; border: 0px; font-variant-numeric: inherit; font-variant-east-asian: inherit; font-stretch: inherit; line-height: inherit; font-family: -apple-system, BlinkMacSystemFont, &quot;Segoe UI&quot;, Roboto, Lato, Helvetica, Arial, sans-serif; vertical-align: baseline; color: rgb(107, 75, 161);">visual</a><span style="font-family: -apple-system, BlinkMacSystemFont, &quot;Segoe UI&quot;, Roboto, Lato, Helvetica, Arial, sans-serif;">&nbsp;information from the&nbsp;</span><a href="https://en.wikipedia.org/wiki/Retina" title="Retina" style="margin: 0px; padding: 0px; border: 0px; font-variant-numeric: inherit; font-variant-east-asian: inherit; font-stretch: inherit; line-height: inherit; font-family: -apple-system, BlinkMacSystemFont, &quot;Segoe UI&quot;, Roboto, Lato, Helvetica, Arial, sans-serif; vertical-align: baseline; color: rgb(107, 75, 161);">retina</a><span style="font-family: -apple-system, BlinkMacSystemFont, &quot;Segoe UI&quot;, Roboto, Lato, Helvetica, Arial, sans-serif;">&nbsp;to the&nbsp;</span><a href="https://en.wikipedia.org/wiki/Brain" title="Brain" style="margin: 0px; padding: 0px; border: 0px; font-variant-numeric: inherit; font-variant-east-asian: inherit; font-stretch: inherit; line-height: inherit; font-family: -apple-system, BlinkMacSystemFont, &quot;Segoe UI&quot;, Roboto, Lato, Helvetica, Arial, sans-serif; vertical-align: baseline; color: rgb(107, 75, 161);">brain</a><span style="font-family: -apple-system, BlinkMacSystemFont, &quot;Segoe UI&quot;, Roboto, Lato, Helvetica, Arial, sans-serif;">. In humans, the optic nerve is derived from&nbsp;</span><a href="https://en.wikipedia.org/wiki/Optic_stalk" title="Optic stalk" style="margin: 0px; padding: 0px; border: 0px; font-variant-numeric: inherit; font-variant-east-asian: inherit; font-stretch: inherit; line-height: inherit; font-family: -apple-system, BlinkMacSystemFont, &quot;Segoe UI&quot;, Roboto, Lato, Helvetica, Arial, sans-serif; vertical-align: baseline; color: rgb(107, 75, 161);">optic stalks</a><span style="font-family: -apple-system, BlinkMacSystemFont, &quot;Segoe UI&quot;, Roboto, Lato, Helvetica, Arial, sans-serif;">&nbsp;during the seventh week of development and is composed of&nbsp;</span><a href="https://en.wikipedia.org/wiki/Retinal_ganglion_cell" title="Retinal ganglion cell" style="margin: 0px; padding: 0px; border: 0px; font-variant-numeric: inherit; font-variant-east-asian: inherit; font-stretch: inherit; line-height: inherit; font-family: -apple-system, BlinkMacSystemFont, &quot;Segoe UI&quot;, Roboto, Lato, Helvetica, Arial, sans-serif; vertical-align: baseline; color: rgb(107, 75, 161);">retinal ganglion cell</a><span style="font-family: -apple-system, BlinkMacSystemFont, &quot;Segoe UI&quot;, Roboto, Lato, Helvetica, Arial, sans-serif;">&nbsp;axons and&nbsp;</span><a href="https://en.wikipedia.org/wiki/Glial_cell" title="Glial cell" class="mw-redirect" style="margin: 0px; padding: 0px; border: 0px; font-variant-numeric: inherit; font-variant-east-asian: inherit; font-stretch: inherit; line-height: inherit; font-family: -apple-system, BlinkMacSystemFont, &quot;Segoe UI&quot;, Roboto, Lato, Helvetica, Arial, sans-serif; vertical-align: baseline; color: rgb(107, 75, 161);">glial cells</a><span style="font-family: -apple-system, BlinkMacSystemFont, &quot;Segoe UI&quot;, Roboto, Lato, Helvetica, Arial, sans-serif;">; it extends from the&nbsp;</span><a href="https://en.wikipedia.org/wiki/Optic_disc" title="Optic disc" style="margin: 0px; padding: 0px; border: 0px; font-variant-numeric: inherit; font-variant-east-asian: inherit; font-stretch: inherit; line-height: inherit; font-family: -apple-system, BlinkMacSystemFont, &quot;Segoe UI&quot;, Roboto, Lato, Helvetica, Arial, sans-serif; vertical-align: baseline; color: rgb(107, 75, 161);">optic disc</a><span style="font-family: -apple-system, BlinkMacSystemFont, &quot;Segoe UI&quot;, Roboto, Lato, Helvetica, Arial, sans-serif;">&nbsp;to the&nbsp;</span><a href="https://en.wikipedia.org/wiki/Optic_chiasma" title="Optic chiasma" class="mw-redirect" style="margin: 0px; padding: 0px; border: 0px; font-variant-numeric: inherit; font-variant-east-asian: inherit; font-stretch: inherit; line-height: inherit; font-family: -apple-system, BlinkMacSystemFont, &quot;Segoe UI&quot;, Roboto, Lato, Helvetica, Arial, sans-serif; vertical-align: baseline; color: rgb(107, 75, 161);">optic chiasma</a><span style="font-family: -apple-system, BlinkMacSystemFont, &quot;Segoe UI&quot;, Roboto, Lato, Helvetica, Arial, sans-serif;">&nbsp;and continues as the&nbsp;</span><a href="https://en.wikipedia.org/wiki/Optic_tract" title="Optic tract" style="margin: 0px; padding: 0px; border: 0px; font-variant-numeric: inherit; font-variant-east-asian: inherit; font-stretch: inherit; line-height: inherit; font-family: -apple-system, BlinkMacSystemFont, &quot;Segoe UI&quot;, Roboto, Lato, Helvetica, Arial, sans-serif; vertical-align: baseline; color: rgb(107, 75, 161);">optic tract</a><span style="font-family: -apple-system, BlinkMacSystemFont, &quot;Segoe UI&quot;, Roboto, Lato, Helvetica, Arial, sans-serif;">&nbsp;to the&nbsp;</span><a href="https://en.wikipedia.org/wiki/LGN" title="LGN" class="mw-redirect" style="margin: 0px; padding: 0px; border: 0px; font-variant-numeric: inherit; font-variant-east-asian: inherit; font-stretch: inherit; line-height: inherit; font-family: -apple-system, BlinkMacSystemFont, &quot;Segoe UI&quot;, Roboto, Lato, Helvetica, Arial, sans-serif; vertical-align: baseline; color: rgb(107, 75, 161);">lateral geniculate nucleus</a><span style="font-family: -apple-system, BlinkMacSystemFont, &quot;Segoe UI&quot;, Roboto, Lato, Helvetica, Arial, sans-serif;">,&nbsp;</span><a href="https://en.wikipedia.org/wiki/Pretectal_area" title="Pretectal area" style="margin: 0px; padding: 0px; border: 0px; font-variant-numeric: inherit; font-variant-east-asian: inherit; font-stretch: inherit; line-height: inherit; font-family: -apple-system, BlinkMacSystemFont, &quot;Segoe UI&quot;, Roboto, Lato, Helvetica, Arial, sans-serif; vertical-align: baseline; color: rgb(107, 75, 161);">pretectal nuclei</a><span style="font-family: -apple-system, BlinkMacSystemFont, &quot;Segoe UI&quot;, Roboto, Lato, Helvetica, Arial, sans-serif;">, and&nbsp;</span><a href="https://en.wikipedia.org/wiki/Superior_colliculus" title="Superior colliculus" style="margin: 0px; padding: 0px; border: 0px; font-variant-numeric: inherit; font-variant-east-asian: inherit; font-stretch: inherit; line-height: inherit; font-family: -apple-system, BlinkMacSystemFont, &quot;Segoe UI&quot;, Roboto, Lato, Helvetica, Arial, sans-serif; vertical-align: baseline; color: rgb(107, 75, 161);">superior colliculus</a><span style="font-family: -apple-system, BlinkMacSystemFont, &quot;Segoe UI&quot;, Roboto, Lato, Helvetica, Arial, sans-serif;">.</span>