sensation and perception II

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  1. Optic Chiasm
    Junction of the optic nerves from each eye.
  2. Geniculostriate System
    Projections from the retina to the lateral geniculate nucleus to the primary visual cortex.
  3. Striate Cortex
    Primary visual cortex (V1) in the occipital lobe. Striped appearance when stained
  4. Tectopulvinar System
    Projections from the retina to the superior colliculus to the pulvinar (thalamus) to the parietal and temporal visual areas
  5. Dorsal Visual Stream
    • Pathway that originates in the occipital cortex and projects
    • to the parietal cortex

    The “how” pathway (how action is to be guided toward objects)
  6. Ventral Visual Stream
    Pathway that originates in the occipital cortex and projects to the temporal cortex 

    The “what” pathway (identifies what an object is)
  7. Cortical column
    Organization that represents a functional unit of six cortical layers deep and approximately 0.5 mm square

    perpendicular to the cortical surface.
  8. Tectopulvinar Pathway
    Magnocellular cells from the retina project to the superior colliculus, which then sends information to the pulvinar (thalamus)

    magnocellular cells -> superior colliculus -> pulvinar (Thalamus)
  9. Medial Pulvinar
    sends connections to the parietal lobe
  10. Lateral Pulvinar
    sends connections to the temporal lobe

    provides information regarding location "where"
  11. Occipital Cortex
    Composed of 6 different regions 
  12. Primary Visual Cortex (V1)
    Striate cortex that receives input from the lateral geniculate nucleus.
  13. Extrastriate (Secondary Visual) Cortex
    Visual cortical areas outside the striate cortex.
  14. Blob
    • Region in the visual cortex that contains color-sensitive neurons
    • Revealed by staining for cytochrome oxidase
  15. Interblob
    • Region that separates blobs
    • Participates in perception of form and motion
  16. Thick Stripes
    receives information from movement-sensitive neurons
  17. Thin Stripes
    Receive information form color sensitive neurons
  18. Pale Zones
    Receive information from form-sensitive neurons
  19. Agnosia
    not knowing
  20. Visual-form Agnosia
    inability to recognize objects or drawings of objects
  21. Color Agnosia (Achromatopsia)
    inability to recognize colors
  22. Face Agnosia (prosopagnosia) 
    inability to recognize faces
  23. Optic Ataxia
    • deficit in the visual control of reaching and other movements
    • can recognize objects but can't reach out and grab it
Card Set:
sensation and perception II
2012-11-05 22:24:31
sensation perception

lecture 11 cont.
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