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The fibers from the retina run along the optic nerve to nine primary visual nuclei in the brain, from which a major relay inputs into the primary visual cortex. A fundus photograph showing the back of the retina. The white circle is the beginning of the optic nerve. The optic nerve is composed of retinal ganglion cell axons and glia.
Post Falls is a city in Kootenai County, Idaho, United States. It is the gateway city to Northern Idaho off Interstate 90 , just west of Coeur d'Alene , and east of Spokane, Washington . The population was 38,485 at the 2020 census , [ 3 ] making it Idaho's ninth-largest city and the second largest city in North Idaho behind Coeur d’Alene.
The 22 United States statistical areas and 44 counties of the State of Idaho [a] Combined statistical area [1] 2023 population (est.) [3] Core-based statistical area [1] 2023 population (est.) [3] County 2023 population (est.) [3] Boise City-Mountain Home-Ontario, ID-OR CSA: 913,704 881,660 (ID) Boise City, ID MSA: 824,657 Ada County, Idaho ...
Visual phototransduction is the sensory transduction process of the visual system by which light is detected by photoreceptor cells (rods and cones) in the vertebrate retina.A photon is absorbed by a retinal chromophore (each bound to an opsin), which initiates a signal cascade through several intermediate cells, then through the retinal ganglion cells (RGCs) comprising the optic nerve.
The 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. [14] The optic tract represents the first stage in the visual pathway in which visual information is transferred in a homonymous nature. [ 15 ]
Special somatic afferent fibers (SSA) are the afferent nerve fibers that carry information from the special senses of vision, hearing and balance. The cranial nerves containing SSA fibers are the optic nerve (CN II) and the vestibulocochlear nerve (CN VIII). [1] [2]
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RNFL asymmetry has been proposed as a strong indicator of optic neuritis, [7] [8] with one small study proposing that asymmetry of 5–6μm was "a robust structural threshold for identifying the presence of a unilateral optic nerve lesion in MS." [9] Optic neuritis is often associated with multiple sclerosis, and RNFL data may indicate the pace ...