Parts
A distinctive feature of the optic radiations is that they split into two parts on each side:
| Source | Path | Information | Damage |
| Fibers from the inferior retina (also called "Meyer's loop" or "Archambault's loop") | must pass through the temporal lobe by looping around the inferior horn of the lateral ventricle. | Carry information from the superior part of the visual field | A lesion in the temporal lobe that results in damage to Meyer's loop causes a characteristic loss of vision in a superior quadrant (quadrantanopia or "pie in the sky" defect.) |
| Fibers from the superior retina (also called "Baum's loop") | travel straight back through the parietal lobe to the occipital lobe in the retrolenticular limb of the internal capsule to the visual cortex. | Carry information from the inferior part of the visual field | Taking the shorter path, these fibers are less susceptible to damage. |
Read more about this topic: Optic Radiation
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