Notes-Eyes - Muller Cells•Getting hit in the head hard...

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Unformatted text preview: 3-2-10Muller Cells•Getting 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 Cells•Collect information within the retina•Exit the eye carrying a map of images from visual field•Comprises the optic nerve•Center-Surround receptive fields•Projection pattern produces retinotopic organization•Three different typesoParvocellular neurons (hooked mostly to Cone Photoreceptors)Small, center-surround receptive fieldsProduce sustained responses to stimuliInsensitive to motionSensitive to wavelengthCompact dendritic fields•Morphologically called: Midget Cells80% of optic nerveProject only to thalamus•Specifically, lateral geniculate nucleus (LGN)oPrinciple Visual Component of the ThalamusoBilateral, six-layer structureoMagnocellular layer1 and 2oParvocellular layar3, 4, 5, and 6oKoniocellular layarIn between•Ocular DominanceoContralateral informationEnd up in 1, 4, and 6oIpsilateral informationEnd up in 2, 3, and 5•Center-Surround Receptive fieldsFunction•Color•Form•TextureoMagnocellular NeuronsLarge, center-surround receptive fieldsTransient responses to stimuliSensitive to motionInsensitive to wavelengthLarge dendritic fields•Parasol cells10% of optic nerveProject to•ThalamusoLGN•MidbrainoSuperior ColliculusFunction•Movement•Location•DepthoKoniocellular neuronsPhylogenetically the oldest type of Ganglion CellLarge, diffuse receptive fieldsTransient responses to stimuliSmall cell bodies varying dendritic structure...
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This note was uploaded on 04/20/2010 for the course BIOL 3064 taught by Professor Dr.wight during the Spring '10 term at Ouachita Baptist.

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Notes-Eyes - Muller Cells•Getting hit in the head hard...

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