Relating to or involving a crossing of nerve fibers or neural pathways, particularly referring to structures that cross over like the optic chiasm.
Combines Greek 'chiasma' (cross) with 'neuro-' (relating to nerves) and '-al' (adjective suffix). This scientific term describes anatomical structures where neural tissue intersects.
Your optic nerves actually cross over completely inside your brain—the left side of both eyes connects to the right side of your brain and vice versa. This chiastoneural crossing lets your brain see the whole visual field smoothly, even though the image flips upside down on your retina!
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