lateral geniculate nucleus(redirected from Lgn)
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dorsal lateral geniculate nu·cle·us[TA]
main division of the lateral geniculate body; consists of two magnocellular layers [TA] (strata magnocellularia [TA]) and four parvocellular layers [TA] (strata parvocellularia [TA]) and serves as a processing station in the major pathway from the retina to the cerebral cortex, receiving fibers from the optic tract and giving rise to the geniculocalcarine radiation to the visual cortex in the occipital lobe.
Synonym(s): nucleus dorsalis corporis geniculati lateralis [TA]
lateral geniculate nucleus
The visual relay nucleus of the thalamus. It is a set of nuclei located on the bottom rear edges of the thalamus, lateral to the medial geniculate nucleus. Axons from the retinal ganglion cells of the retina reach the lateral geniculate via the optic nerve and optic tract and then synapse in topographic order. The outflow axons from the lateral geniculate neurons run in the optic radiation and synapse in the primary visual cortex in the occipital hemisphere, again maintaining their topographic organization.
See also: nucleus