Parallel Processing of Bright/Dark

• Each Ganglion Cell has a Retinal Recepetive Field

• On-center Ganglion

  • Light ON center Produces Neural Activity
  • Light OFF center Reduces Neural Activity

• Off-center Ganglion

  • Dark ON center Produces Neural Activity/Light Reduces
  • Light OFF center Reduces Neural Activity

On Center Off Center Combined Response

BRIGHT!

DARK!

CONTRAST

CONTRAST

NO CONTRAST

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