Figure 2.

Effects of Adaptation on LGN and V1 Tuning Curves and Population Responses

(A and B) Full response matrix of LGN in balanced (A) and biased (B) conditions, computed from sliding window bin of fixed width (4°) across preferred position. For clarity, we have symmetrized the data by averaging data with the same absolute distance from the adaptor position. Black lines trace the preferred stimulus for each neural bin. (C and D) Difference in gain and preferred position of LGN receptive field profiles computed for biased and balanced conditions. Thick black lines and gray fields indicate median and 90% confidence intervals of bootstrap fits to the data. Curves fitted to gain changes (C) are Gaussians, and curves fitted to position changes (D) are Gabor functions. Measured points are indicated by circles. Triangles indicate their mirror-symmetric duplicates. (E–H) Same conventions as (A)–(D) for corresponding measurements in V1. Filled symbols in (C), (D), (G), and (H) refer to example cells in Figures 1I and 1J. n = 86 for (A)–(D) and n = 29 for (E)–(H). (I–L) Same conventions as (A)–(D) for the predictions of the fixed summation model of V1 responses (described in Figure 3). See also Figure S2.