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Visual system structure

Description

Bsc ED209 Mind Map on Visual system structure, created by charliestar04 on 17/09/2013.
charliestar04
Mind Map by charliestar04, updated more than 1 year ago
charliestar04
Created by charliestar04 over 11 years ago
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Resource summary

Visual system structure
  1. Lens.
    1. Accommodation inefficient = poor focus
    2. Retina
      1. Rods & cones sense light & colour
        1. Cones migrate to forvea in early months, improving perception of colour & detail
      2. Optic nerves
        1. Formed but not myelinated til 3 mth.
          1. Transmission of info slow
            1. O.N. terminate in lateral geniculate nucleus
        2. Lateral geniculate nucleus
          1. Complex structure at base of brain
            1. Retinal image mapped into LGN, enhances detail
              1. Mature by 12 mth
          2. Visual cortex
            1. Different cells respond to different features
              1. Light, dark, lines, size, colour & movement
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