Psychology 1000 Lecture Notes - Lecture 13: Retinal Ganglion Cell, Spectral Sensitivity, Receptive Field

• School: Western University
• Department: Psychology
• Course: Psychology 1000
• Professor: Dr.Mike

Document Summary

Amacine cells horizontal cell (completely inhibitory- modify signal/clean up image) Will fire in response very dim lightning. Must use peripheral vision to see distant light sources. Breakdown in the presence of light (into 2 pieces) Suggest each one can identify a different color . How to do we demonstrate how rods and cones work: dark adaption: Blast light in utter darkness -> bleaches pigments in eyeball and then examine what happens during recovery. More time in the dark pigments in the rods and cones regenerate. Cones are more sensitivity in the start (but stop getting better after 10 mins in the dark) Rods gets a lot more sensitive: spectral sensitivity. Different colors light prompts different cones to respond. Detect when it generates an action potential. Project spot of light on screen and move until output maximum. This is retinal area served by that ganglion cell. Movement in any direction decreases firing rate. Using the information to plt at receptive field.