Visual system structure

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

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