Lateral Inhibition and Receptive Fields

1
Lateral Inhibition and Receptive Fields

• Lateral Inhibition
• Light on one regions of retinal inhibits ability
  or adjacent regions to respond to light
• First studied by Hartline in Limulus Eye
• This is a compound eye
• Each bar represents one ommatidium or eyelet

2
How Lateral Inhibition Works
Ommatidia

• Through path is full strength and positive
• Lateral paths are 0.2 strength and negative

3
Review of Lateral Inhibition

• What is the effect of light in adjacent
  ommatidia?
• How much Lateral Inhibition occurs?
• Note it is proportional to the intensity of light
  coming in?
• What happens to the edge?