WebMar 31, 2015 · The optic tract is an extension of the optic nerve located in the brain. It begins at the area where information from the left eye and right eye cross (or “decussate”) to create a complete ... WebMar 12, 2024 · Left homonymous hemianopia: If there is a lesion in the right optic tract (past the optic chiasm), the temporal fiber of the right eye and the nasal fiber of the left eye (which crossed over) can ...
Optic Nerve Anatomy, Function & Problems - Study.com
WebThe optic tract is a continuation of the optic nerve that relays information from the optic chiasm to the ipsilateral lateral geniculate nucleus (LGN), pretectal nuclei, and superior colliculus. The optic tract represents the first stage in the visual pathway in which visual information is transferred in a homonymous nature. [13] WebJun 5, 2016 · A complete lesion of one optic tract thus preferentially reduces input from the contralateral eye, and the result is an RAPD unassociated with any evidence of an optic neuropathy or retinopathy. … hill reaktion photosynthese
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WebFeb 23, 2024 · The optic nerve (cranial nerve II) contains both nasal and temporal fibers from one eye. Distally, it is covered by meninges. As it passes through the optic canal, the meninges leave its outer coat. Intracranial course. The optic nerve continues intracranially. The optic chiasm is a midline junction where nasal fibers of each optic nerve ... WebFeb 23, 2024 · The optic radiation (geniculocalcarine tract) is the white matter tract from the lateral geniculate body to the primary visual cortex. It travels via the retrolentiform segment of the internal capsule. Some fibers pass directly through the deep part of the parietal lobe to reach the visual cortex of the occipital lobe above the calcarine sulcus ... WebDec 19, 2024 · Therefore, chronic optic tract lesions will cause optic atrophy, often in a characteristic pattern. Lesions of the optic tract (left optic tract lesion in the example in Fig. 3.22) produce atrophy of three groups of retinal ganglion cell fibers: 1. Nasal half of the macula of the right eye ([1–red] in Fig. 3.22d) 2. hill reaction and heated chloroplast