Fig. 8.

Effects of removing cortical feedback. (a) Red tuning curve derived from a 5-ms integration window for a cell pair without feedback (same pair as Fig. 6b), tuning half-width 13.0°, which was close to the mean of the data for the cells without feedback (12.2° ± 0.99). For comparison, the tuning curve of the control cell pair shown in Fig. 7b is replotted on the same axes. (b) Scatter plot of tuning half-width versus mean shift of cross-correlogram peak with orientation. Control data are black, and feedback removed data are red. (c) Scatter plot of tuning half-width versus LGN cell center-to-center separation.