Lecture 14

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Lecture 14
- Frogs visual system
  - Visuo-spatial module
  - Visuo-motor module
  - run independently from eye to brain and motor output areas
  - optic tectum (superior colliculus in primates)
  - NO projection to cerebral cortex
- Primate visual system
  - retain tectal / collicular pathway - operates outside of conscious experience
  - Developed geniculate - striate pathway gives rise to subjective experience
- Damage to visual system
  - Damage to V1
    - Cortical blindsight
  - Damage to tectal/collicular pathway
    - Neglect
- Mishkin and Ungerleider (1982)
  - Dorsal - WHERE stream
    - movement
    - M ganglion cell
      - Magnocellular layer
        V1
        V2
        V3
        Untitled
  - Ventral - WHAT stream
    - colour + form
    - P ganglion cell
      - Parvocellular LGN
        V1
        V2
        V4
        Temporal lobe
NO projection to cerebral cortex
Higher visual areas in parietal and temporal lobes
- Superior colliculus / optic tectum
- V1

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