Optic radiation
Neural pathway in the visual system / From Wikipedia, the free encyclopedia
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In neuroanatomy, the optic radiation (also known as the geniculocalcarine tract, the geniculostriate pathway, and posterior thalamic radiation) are axons from the neurons in the lateral geniculate nucleus to the primary visual cortex. The optic radiation receives blood through deep branches of the middle cerebral artery and posterior cerebral artery.
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Optic radiation | |
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Details | |
System | Visual system |
Function | Vision |
Identifiers | |
Latin | radiatio optica |
NeuroNames | 1440 |
TA98 | A14.1.08.673 A14.1.09.542 A14.1.09.547 |
TA2 | 5584 |
FMA | 61941 |
Anatomical terms of neuroanatomy |
They carry visual information through two divisions (called upper and lower division) to the visual cortex (also called striate cortex) along the calcarine fissure. There is one set of upper and lower divisions on each side of the brain. If a lesion only exists in one unilateral division of the optic radiation, the consequence is called quadrantanopia, which implies that only the respective superior or inferior quadrant of the visual field is affected. If both divisions on one side of the brain are affected, the result is a contralateral homonymous hemianopsia.