| Lateral geniculate nucleus | |
|---|---|
 Hind- and mid-brains; postero-lateral view. (Lateral geniculate body visible near top.) | |
| Details | |
| Part of | Thalamus |
| System | Visual |
| Artery | Anterior choroidal and Posterior cerebral |
| Vein | Terminal vein |
| Identifiers | |
| Latin | corpus geniculatum laterale |
| Acronym(s) | LGN |
| NeuroNames | 352 |
| NeuroLex ID | birnlex_1662 |
| TA98 | A14.1.08.302 |
| TA2 | 5666 |
| FMA | 62209 |
| Anatomical terms of neuroanatomy | |
In neuroanatomy, the lateral geniculate nucleus (LGN; also called the lateral geniculate body or lateral geniculate complex) is a structure in the thalamus and a key component of the mammalian visual pathway. It is a small, ovoid, ventral projection of the thalamus where the thalamus connects with the optic nerve. There are two LGNs, one on the left and another on the right side of the thalamus. In humans, both LGNs have six layers of neurons (grey matter) alternating with optic fibers (white matter).
The LGN receives information directly from the ascending retinal ganglion cells via the optic tract and from the reticular activating system. Neurons of the LGN send their axons through the optic radiation, a direct pathway to the primary visual cortex. In addition, the LGN receives many strong feedback connections from the primary visual cortex.[1] In humans as well as other mammals, the two strongest pathways linking the eye to the brain are those projecting to the dorsal part of the LGN in the thalamus, and to the superior colliculus.[2]
- ^ Cudeiro, Javier; Sillito, Adam M. (2006). "Looking back: corticothalamic feedback and early visual processing". Trends in Neurosciences. 29 (6): 298–306. CiteSeerX 10.1.1.328.4248. doi:10.1016/j.tins.2006.05.002. PMID 16712965. S2CID 6301290.
- ^ Goodale, M. & Milner, D. (2004)Sight unseen.Oxford University Press, Inc.: New York.