01:830:301 Lecture Notes - Lecture 7: Color Blindness, Parietal Lobe, Negative Zone
14 Feb 2017
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Dark adaptation (when we first see nothing in the dark, and then our vision gets better) Going down (inverted y-axis) the sensitivity gets better. When you first enter the dark room, you are using cones first to see. (because when you enter, cones has the high sensitivity. Cones system sensitivity is greater than the rod system. As the rods stay in the dark they recover their sensitivity. Beyond the 6-7 min mark now the rods are more sensitive than the cones. How do the ganglion cells respond to light. You have a display, you are going to splash spots of light, and you are measuring from one single ganglion cell. A ganglion cell can respond to light in. 3 ways: firing rate (increase, decrease, none) How does light at different locations affect a ganglion cell: most of the retina: no response , small circular region where light excites the cell (meaning increase its firing rate according to the baseline)
