1. Adaptation Properties of Macaque MT Neurons Adam Kohn Matt A. Smith Najib Majaj J. Anthony Movshon

2. Questions Change in direction tuning –Direction specificity Transfer of adaptation in RF –Spatial specificity

3. Dragoi et al. (2000) Specificity of V1 Adaptation Effects Spatial Frequency -Movshon and Lennie (1978) -Saul and Cynader (1989) Temporal Frequency - Saul and Cynader (1989) Orientation -Muller et al. (1999) -Dragoi et al. (2000)

4. Test Adapt

7. Preferred Flank Null

9. Response=R max c n /(c n +c 50 n )+base Test Adapt Test

15. Proportion of Cells Ratio of Contrast Sensitivities Different Patch Same Patch 0.5 0.25

17. Ratio of Contrast Sensitivities Proportion of Cells 0.5 0.25 Different Patch Same Patch

18. Conclusions Adaptation in MT causes a change in contrast gain transfers across directions within the tuning curve does not transfer across positions within the RF