Editing Lateral geniculate nucleus (section)

== Output ==
Information leaving the LGN travels out on the [[optic radiation]]s, which form part of the ''retrolenticular portion'' of the [[internal capsule]].

The [[axon]]s that leave the LGN go to V1 [[visual cortex]]. Both the magnocellular layers 1–2 and the parvocellular layers 3–6 send their axons to layer 4 in V1. Within layer 4 of V1, layer 4cβ receives parvocellular input, and layer 4cα receives magnocellular input. However, the koniocellular layers, intercalated between LGN layers 1–6 send their axons primarily to the cytochrome-oxidase rich blobs of layers 2 and 3 in V1.<ref name=HendryandReid2000>{{cite journal|last=Hendry|first=Stewart H. C.|author2=Reid, R. Clay|title=The koniocellular pathway in primate vision|journal=Annual Review of Neuroscience|year=2000|pmid=10845061|pages=127–153|volume=23|doi=10.1146/annurev.neuro.23.1.127}}</ref> [[Axon]]s from layer 6 of [[visual cortex]] send information back to the LGN.

Studies involving [[blindsight]] have suggested that projections from the LGN travel not only to the primary visual cortex but also to higher cortical areas V2 and V3. Patients with blindsight are phenomenally blind in certain areas of the visual field corresponding to a contralateral lesion in the primary visual cortex; however, these patients are able to perform certain motor tasks accurately in their blind field, such as grasping. This suggests that neurons travel from the LGN to both the primary visual cortex and higher cortex regions.<ref name=Schmid2010>{{cite journal|last=Schmid|first=Michael C.|author2=Mrowka, Sylwia W. |author3=Turchi, Janita|title=Blindsight depends on the lateral geniculate nucleus|journal=Nature|year=2010|doi=10.1038/nature09179 |pages=373–377|volume=466|issue=7304|display-authors=etal|pmid=20574422|pmc=2904843|bibcode=2010Natur.466..373S}}</ref>