1. Visual Cortex: V1

2. V1 lateral view medial view calcarine sulcus

3. human brain, coronal section

5. V1 unfolded (from left hemisphere) visual field Macacque monkey V1

6. whole visual field receptive fields at different eccentricities (40 deg vs fovea)

7. Lesion in V1 causes scotoma in visual field

8. visual field lesion scotoma

9. lesion scotoma

10. Novel response properties in V1: 1) orientation-selectivity 2) motion preference 3) binocularity

12. Novel response properties in V1: 1) orientation-selectivity 2) motion preference 3) binocularity

14. receptive field stimulus oscilloscope trace time Hubel & Wiesel 1962

18. electrode track

19. What causes orientation selectivity?

31. Intracellular records from simple cell

33. Novel response properties in V1: 1) orientation-selectivity 2) motion preference 3) binocularity

35. Novel response properties in V1: 1) orientation-selectivity 2) motion preference 3) binocularity

38. Organization in V1: ocular dominance columns

43. ocular dominance columns

44. binocular cells

47. Color Vision in V1?

48. Review… Retina & LGN: find light-dark boundaries V1: find orientation of those boundaries

49. Review… Retina & LGN: find light-dark boundaries V1: find orientation of those boundaries