The thalamus and superior colliculus are connected via lateral geniculate nucleus. Each optic tract terminates in the lateral geniculate nucleus (LGN) in the thalamus. Sensory and parasympathetic inputs are carried into the geniculate ganglion via the nervus intermedius. BiK-type retinal ganglion cells project to the koniocellular layers of the lateral geniculate nucleus. M-type retinal ganglion cells project to the magnocellular layers of the lateral geniculate nucleus. P-type retinal ganglion cells project to the parvocellular layers of the lateral geniculate nucleus. These fibers reach the geniculate ganglion but do not synapse. Retinal sensors send signals through the optic tract to the Lateral geniculate nucleus. Ramsay Hunt syndrome type 2 refers to shingles of the geniculate ganglion. The dorsolateral geniculate nucleus is the main division of the lateral geniculate body. Projections to the subthalamus are target toward the lateral geniculate nucleus and pulvinar. The anterior visual pathway refers to structures involved in vision before the lateral geniculate nucleus. Most of the optic nerve fibers end in the lateral geniculate nucleus (LGN). The metathalamus is made up of the lateral geniculate and medial geniculate nuclei. Its inferior brachium (arm-like process) reaches to the medial geniculate nucleus of the diencephalon.