Notes-Eyes - 3-2-10Muller CellsGetting hit in the head hard...

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Unformatted text preview: 3-2-10Muller CellsGetting hit in the head hard enough to cause lights to be seen, are caused by floaters, the light photon hits photoreceptors at weird angles causing incorrect signals for light.Ganglion CellsCollect information within the retinaExit the eye carrying a map of images from visual fieldComprises the optic nerveCenter-Surround receptive fieldsProjection pattern produces retinotopic organizationThree different typesoParvocellular neurons (hooked mostly to Cone Photoreceptors)Small, center-surround receptive fieldsProduce sustained responses to stimuliInsensitive to motionSensitive to wavelengthCompact dendritic fieldsMorphologically called: Midget Cells80% of optic nerveProject only to thalamusSpecifically, lateral geniculate nucleus (LGN)oPrinciple Visual Component of the ThalamusoBilateral, six-layer structureoMagnocellular layer1 and 2oParvocellular layar3, 4, 5, and 6oKoniocellular layarIn betweenOcular DominanceoContralateral informationEnd up in 1, 4, and 6oIpsilateral informationEnd up in 2, 3, and 5Center-Surround Receptive fieldsFunctionColorFormTextureoMagnocellular NeuronsLarge, center-surround receptive fieldsTransient responses to stimuliSensitive to motionInsensitive to wavelengthLarge dendritic fieldsParasol cells10% of optic nerveProject toThalamusoLGNMidbrainoSuperior ColliculusFunctionMovementLocationDepthoKoniocellular neuronsPhylogenetically the oldest type of Ganglion CellLarge, diffuse receptive fieldsTransient responses to stimuliSmall cell bodies varying dendritic structure...
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Notes-Eyes - 3-2-10Muller CellsGetting hit in the head hard...

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