PSYC 2650 Chapter Notes - Chapter 3: Occipital Lobe, Grayscale, Spatial Analysis
12 Apr 2020
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Cones are most frequent at the fovea, as they help with seeing colour and have better acuity. Vision = dominant sense great brain area devoted to vision compared to other senses. Light hits the front surface of the eyeball, passes through the cornea and the lens, and then hits the retina. Can distinguish different intensities of light (gray-scale) Photoreceptors stimulate bipolar cells, which stimulate ganglion cells. The ganglion cells axons converge to form the bundle of nerve fibers called the optic nerve. Photoreceptors bipolar cells ganglion cells optic nerve. The optic nerve leaves the eyeball and carries information to various sites in the brain. The information is first sent to the lateral geniculate nucleus (lgn) and then is transmitted to the occipital lobe. Within the optic nerve, there are p cells and m cells. P cells are specialized for spatial analysis and the detailed analysis of form.
