The Optic chiasma is a structure on the underside of the brain. It is "X"-shaped, and results from the crossing of the two decusating optic nerves from the left and right eyes. Ad blocker interference detected! Wikia is a free-to-use site that makes money from advertising. We have a modified experience for viewers using ad blockers Wikia is not accessible if you’ve made further modifications. Remove the custom ad blocker rule(s) and the page will load as expected. Categories: Nervous System Add category Cancel Save
