Visual system structure

Descripción

Bsc ED209 Mapa Mental sobre Visual system structure, creado por charliestar04 el 17/09/2013.
charliestar04
Mapa Mental por charliestar04, actualizado hace más de 1 año
charliestar04
Creado por charliestar04 hace alrededor de 11 años
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Resumen del Recurso

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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