Chapter 10 Flashcards
Rods
Scoptic-dark
Low acuity,slower responders, many rods to 1 ganglion cell
1 photon to activate
Photoreceptors
Rods and cones
Cones
Phototropic
High acuity, color, fast responding, few cones to 1 ganglion cell, 100 photons of light to activate
Converting lightwaves to neural activity
Light activates rhodopsin
-dissociates retinal and opsin/activates transducing
-transducig activates phosophodiasterase
Light activation produces hyper-polarization of rods/cones
Areas of visual cortex
V1.V2, V3,V4, V5
Inferior temporal
V1
(primary visual cortex)
V2
Input from V1
Projects to V4 and back to V1
Simple cells like V1
Complex cells
V5
Medial temporal
Processes motion
V4
Processes color/shape
Inferior temporal
Complex forms are processed
Influences by learning and experience