PSYC 2700 Chapter Notes -Ganglion Cell, Occipital Lobe, Peripheral Vision
22 Nov 2013
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Document Summary
3 basic layers of neurons in the eyes: Rods and cones (at the back layer of the retina) are the first neurons stimulated by light. The extended axons of the ganglions cells form the optic nerve, which leads to the visual cortex in the occipital lobe (lower rear portion of the brain). 7 million cones (most of which lie in a small area known as the fovea) which provides us with our most accurate, precise vision. Some cones have their own bipolar cell to which they connect. This is not the case in peripheral vision, however. 20degrees away from the fovea, tens or hundreds of rods in the periphery converge onto a single bipolar cell, causing loss of information because a bipolar cell cannot tell which rod triggered it. Sensation: reception of stimulation from the environment and the initial encoding of that stimulation into the nervous system. Perception: process of interpreting and understand sensory information.
