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Visual Pathways

Visual Pathways. CORTEX. Subcortical; Brainstem. Dorsal Stream (towards Parietal). Visuospatial Object location (“Where”) How to interact with world (“How”). Optic Ataxia: can recognize an object but can not grasp it. Cortical Localization. Ventral Stream (towards Temporal).

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Visual Pathways

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  1. Visual Pathways CORTEX Subcortical; Brainstem

  2. Dorsal Stream (towards Parietal) Visuospatial Object location (“Where”) How to interact with world (“How”). Optic Ataxia: can recognize an object but can not grasp it.

  3. Cortical Localization.

  4. Ventral Stream (towards Temporal) Object Recognition Damage causes agnosia: a loss of the ability to recognize a class of shapes. Pattern Recognition: Classification Individual instances

  5. Thompson Effect - RMD

  6. Thompson Effect - RMD

  7. Pupillary Light Reflex

  8. Pupilary Light Reflex (eye)

  9. Pupilary Light Reflex (CNS)

  10. Retinal Receptive Fields

  11. Retina

  12. Receptive Field The part of the visual field in which light will influence the activity of the cell Any one cell only “sees” a very small part of the world. It remains forever ignorant of everything outside its receptive field.

  13. Receptive fields are small relative to whole field

  14. Convergence to build larger receptive fields

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