Temporal transfer functions for the postreceptoral cone pathways. a, Temporal transfer functions for L + M + S, L − M, and S. The shaded region indicates ±1 SEM across the three subjects. The solid line is a fourth-order polynomial fit to the data. Views for ROIs at left are medial for V1 and V2/V3, lateral for MT, and ventral for LOC. Insets provide the response profile for each subject. b, Temporal transfer functions for L + M. The dashed red line is the difference of the L + M + S and S temporal transfer functions scaled to best (least-squares) match the L + M modulation.