NROC64H3 Chapter Notes - Chapter 10: Ocular Dominance, Optic Radiation, Ganglion Cell
17 Mar 2012
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Chapter 10 - the central visual system 341-373. Retina extract info from different parts of visual image 100 million photoreceptors but only 1 million axons leaving w information. Pathways serving conscious visual perception includes lateral geniculate nucleus/lgn of thalamus and 1ary visual cortex/area 17, v1, striate cortex. Striate cortex feeds info to >24 cortical areas in temporal + parietal lobes. Studies from cat, rhesus monkey, macaca mulatta, and macaque monkey test done to understand. Retinofugal projection: neural pathway leaving eye, beginning w/ optic nerve (latin- fugal = to flee) The optic nerve, optic chiasm and optic tract. Ganglion cell axons flee retina through 3 structures before forming synapses w/ brain stem. Optic nerves: exit left and right eyes at optic disks, travel through fatty tissue behind eyes in bony orbits, then pass through holes in the floor of skull. Optic chiasms: nerves form this, (names for x shape of. Greek-chi), lying at base of brain, anterior to pituitary glands.
