Friday, June 12, 2009

Optic Chiasm

The optic chiasm is the point at which the optic nerves cross over. The optic chiasm is situated at the bottom of the cerebrum immediately below the hypothalamus. Nervous impulses from retinal cells follows the optic nerve to the optic chiasm, where half the fibers from each eye cross to the opposite cerebral hemisphere. Visual information from the right half of each retina travels to the right occipital lobe, and visual information from the left half of each retina travels to the left occipital lobe.