Psychology 1000 Lecture Notes - Lecture 15: Receptive Field, Spectral Sensitivity, Amacrine Cell

• School: Western University
• Department: Psychology
• Course: Psychology 1000
• Professor: Terry Biggs

Document Summary

Some cells in between bipolar and receptors are horizontal which are inhibitory. Some cells in between ganglion and bipolar cells are amacrine cells which are. Inhibitory: signal is modified to help clean up an image. 120 million rods: rods operate at low intensity and sensitive to brightness (dim lights, none in fovea (none in central fovea, monochrome (vision in black and white, eg. Cannot see star at night when you look at it directly because no rods in fovea, look at it through your periphery. 7 million cones: cones operate at higher intensities and insensitive for brightness, concentrated in fovea, full colour vision. Visual pigments very similar to film in past, break down molecules into two pieces in present of light. Rods: rhodopsin breakdown generates a electrical signal: thus neural chain is activated (reddish but when exposed to light is orangey and broken down completely is bleached and colorless)