1. The Human Visual System Short Overview

2. Terms: LGN, cortex, primary visual cortex, V1

3. Each half of the visual field goes to a different hemisphere of the brain

5. Hemifield neglect

6. Eye Terms: Retina, fovea

7. Layers of the retina Terms: photoreceptors, ganglion cells

8. Receptors Density - Fovea

10. Rods and Cones

11. Image Capture Huge dynamic range 10 -8 – 10 +6 μW/cm 2 Photons: poisson process. Noisy at low levels For low light: large receptors, slow integration Rods/cones, local adaptation,change of amplitude and time constant, motion deblur

12. Dynamic Range

13. Visual receptor types

14. Photo transduction: retinal + opsin

16. Retina Mosaic

17. Color Mixing

19. Neural circuitry of the retina

20. Center-surround Receptive Fields Modified from PSY280F

21. Retina Output: Ganglion Receptive Fields

22. Visual Areas

24. Physiological Recording

25. Recording from a Neuron

26. Orientation Selectivity

27. V1: Direction selectivity Modified from PSY280F

28. Orientation Map, Optical Recording

29. Contours and Boundaries (V1, V2)

30. Rotated Subjective Disk

31. Neon Spreading

32. Stimuli tested in V2, V4

34. Seeing without awareness OR:

35. From pixels to perception Large part of the brain Much of prior to awareness