vision3_17_10bb

vision3_17_10bb - Fun with vision or lies my brain tells me...

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Click to edit Master subtitle style Fun with vision or lies my brain tells me!
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review What are the two types of photoreceptors? Rods and cones How do they differ? Scotopic vs photopic Sensitivity vs resolution 100million vs 4 million Visual system creates an exact replica of your visual environment?
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Review What is the stimulus for the visual system? Light How do the photoreceptors respond to light? Decrease firing rate, release less glutamate How is light transduced into neural activity? Rhodopsin, opsin&Retinal A, causes Sodium channels to close
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Retinal processing: Seeing edges What do you see at the left? What do you perceive? Now what? Why? Lateral inhibition
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Retinal Processing Tonic activity Bipolar cells Depolarized or Hyperpolarized Off-Center Turning off light in center excites (more glutamate) On Center Less glutamate (normally inhibitory) Ganglion Cells Off Center & On Center
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Seeing edges What do you see at the left? What do you perceive?
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vision3_17_10bb - Fun with vision or lies my brain tells me...

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