PSYC 212 Lecture 5: Lecture 5
6 Nov 2018
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Document Summary
The transparent window on the outer part of the eye that allows light into the eyeball is called the. What is the first cell type light is most likely to encounter as it enters the eye and moves towards the back of the eye? a. b. c. d. e. Receptive field: the region on the retina in which stimuli influence a neuron"s firing rate. Receptive fields have a center-surrounding organization (on/off or off/on) Light hyperpolarizes (renders polarity more negative) the center cone. Because the centre cone is placed in the middle of center cone. On-center bipolar cells reverse the sign of the cone (off- centre bipolar would keep the same sign) Dark depolarizes (renders polarity more positive) surround cones. This activates horizontal cells which in turn inhibits all the cones. Because the centre cone is placed in the middle of two horizontal cells, it receives more inhibition than surround cones. Horizontal cells will inhibit all the surrounding cells.
