PSYC 215 Chapter Notes -Inner Nuclear Layer, Outer Nuclear Layer, Retinal Ganglion Cell
12 Mar 2014
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Document Summary
The retina: we have an inverse retina, where light must pass through blood vessels, the optic nerve, and other neurons before reaching the photoreceptors. Octopi have an everse eye, although it is functionally similar to ours: fundus: the back surface of the eye. 540nm (med), and conditions maximal photoreceptor in light scotopic conditions: rods and cones are the 2 types of the outer nuclear layer. In nocturnal animals, this epithelium is reflective so the limited light can be used again. Rods absorb 60% more from a dilate pupil than to cones: if a photon has a frequency near the peak sensitivity of the receptor it strikes, it is more likely to be absorbed. There are three distinct classes of cone photopigments, each having different spectral sensitivities from each other, and from the rod photopigment. Of course, photons of a particular frequency will tend to be captured more by some receptors than others due to spectral sensitivity.
