Explore the intricacies of feedback mechanisms in the visual system through this 20-minute lecture by Grace Lindsay from University College London. Delve into masking studies that reveal the function of local feedback and learn about building a network with separated functions. Discover how two-stage training replicates behavioral findings and visualize activity in different layers. Examine classification accuracy over time and understand how recurrence affects noise classification across layers. Gain insights into the local feedback summary and its implications for visual processing.