1 / 26

6: The Cortical Representation

Human Perception. 6: The Cortical Representation. Overview of the Visual Cortex. Human visual areas. Overview of the Visual Cortex. Human visual areas. Visual Areas in Lateral and Medial Views of Occipital Cortex. GIRKIN AND MILLER Surv Ophthalmol 45 (5) March–April 2001. V1 V2 V3 V3A

fordon
Download Presentation

6: The Cortical Representation

An Image/Link below is provided (as is) to download presentation Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author. Content is provided to you AS IS for your information and personal use only. Download presentation by click this link. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server. During download, if you can't get a presentation, the file might be deleted by the publisher.

E N D

Presentation Transcript

  1. Human Perception 6: The Cortical Representation

  2. Overview of the Visual Cortex • Human visual areas

  3. Overview of the Visual Cortex • Human visual areas

  4. Visual Areas in Lateral and Medial Views of Occipital Cortex GIRKIN AND MILLERSurv Ophthalmol 45 (5) March–April 2001

  5. V1 V2 V3 V3A V4 Anterior Posterior cm Overview of the Visual Cortex • Human visual areas

  6. V1 cm Visual areas occipital lobes, posterior view V2 V3 V3a V4v MT+ left right

  7. Retinotopic Organization • Receptive field location in the human calcarine sulcus

  8. Visual Field MappingPhase-Encoded Retinotopies(Engel et al., 1994,1997)

  9. Eccentricity Maps Lateral Medial SH/081798

  10. Dorsal view 20 deg Eccentricity Maps Occipital WAP TOS Parietal

  11. Retinotopic organization • Methods to estimate the receptive field location

  12. Exposed Calcarine Retinotopy(Horton and Hoyt, 1994)

  13. Organization of V1 Upper VM HM 80 Lower VM

  14. 22 deg Rod free zone 1.2 cm Cortical Magnification and Rod Free Zone

  15. Visual area Dorsal V1 V2 V3 V3A Sagittal V3B hV4 Ventral V7 Fovealconfluence Retinotopic Areas On A Human Brain

  16. Electrical Stimulation of Area V1 • Visual phosphene • Human

  17. Electrical Stimulation of Area V1 • Visual phosphene • Human

  18. Center-Surround: LGN/Retina

  19. Orientation Sensitivity Best orientation

  20. Primary Visual Pathway

  21. Visual Pathways: LGN

  22. The Architecture of Area V1 • V1 is a layered structure

  23. Modules in Visual Cortex

  24. Cytochrome Oxidase blobs in V1

  25. Columnar architecture in other areas Direction columns in MT “Feature” columns in IT

  26. Visual Area Hierarchy

More Related