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Function of the retina
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  1. Function of the retina Annika Malmgren, 2009

  2. FUNCTION OF THE RETINA To convertelectromagneticwavesinto action potentials AND To differentiatebetween different electromagnetic stimuli

  3. structure of the retina

  4. The fovea

  5. Photoreceptors

  6. Photoreception BATHORHODOPSIN RHODOPSIN METARHODOPSIN II Opsin All-trans Water Transducin Retinaldehyde 11-cis Alpha-subunit 5’-GMP cGMP Phosphodiesterase Na+ LIGHT HYPERPOLARIZATION K+ Na+

  7. opsins OPSIN SCOTOPSIN PHOTOPSIN 445 nm 535 nm 570 nm Blue Green Red

  8. Signal transmission Glutamate Glutamate (inhibiting) OFF cells ON cells Inhibition Excitation W-cellsX-cellsY-cells From rods From cones: From cones: Color, shape Movement

  9. FUNCTION OF THE RETINA To convertelectromagneticwavesinto action potentials AND To differentiatebetween different electromagnetic stimuli (bothcolors and static/movement)