Top-Down Inputs Enhance Orientation Selectivity in Neurons of the Primary Visual Cortex during Perceptual Learning
Figure 1
Effect of training on orientation discrimination in V1 neurons.
A. Orientation discrimination task. Subjects reported whether the test orientation was tilted clockwise or anticlockwise with respect to the trained orientation (from [7]). B. Performance in orientation discrimination task (from [7]). C. Orientation tuning curves of five sample V1 neurons (from [7]). D. Slope measured at the trained orientation for trained neurons (solid red line) and naïve neurons (dashed blue line) (from [7]). E. Performance in orientation discrimination task in another experiment (from [8]). F. Neural responses in V1 in the trained location (grey line) and an untrained location (black) (from [8]).