1. Retinal Circuit and Processing
Overview of the retinal circuit
Receptive field (RF) of retinal ganglion cells (RGC)
Neural circuitry underlying the RGC receptive field
From now on we’ll be talking a lot about RF, circuitry, and their relationship!

2. General organization of the visual pathway

4. Different cells in the retina The Basic Retinal Circuit
Back of eye
6. Pigment cells
1. Receptor Cells
(Graded potential)
(input)
2. Bipolar Cells
3. Ganglion Cells
(action potential)
(Output)
4. Horozontal Cells
(Graded potential)
5. Amacrine Cells
(Graded/action potential)
Structure of the eye
Front of eye 2

5. light
Fovea: high spatial resolution
Periphery: low spatial resolution

6. Receptive field of RGC

7. Receptive field
Definition: the area of the retina (or visual field) in which light signals evoke responses
It’s a property of the cell, not a cell or a part of the cell
It depends largely on the synaptic inputs to the cell and to some degree the biophysical property of the cell itself

9. Features of RGC center-surround interactions
There are two types of RFs: ON center/OFF surround, OFF center/ON surround.
Active inhibition of the center response with surround stimulation.
3) A maximal response can be evoked only with an optimally sized spot.
A few other things
Fovea: small RF, high resolution; Periphery: large RF, low resolution
M cells: large RF, fast response, color blind; P cells: small RF, slower response, color sensitive.