[TA] the massive, fanlike fiber system passing from the lateral geniculate body of the thalamus to the visual cortex (striate or calcarine cortex, Brodmann area 17); the fibers follow the retrolenticular and sublenticular limbs of the internal capsule into the corona radiata but they curve back along the lateral wall of the temporal and occipital horns of the lateral ventricle to the striate cortex on the medial surface and pole of the occipital lobe. SYN: radiatio optica [TA], geniculocalcarine radiation, geniculocalcarine tract, Gratiolet fibers, Gratiolet radiation, occipitothalamic radiation, Wernicke radiation.