Figure 4. Uninstructed movements dominate cortical activity.

(A) Black circle denotes information of a reduced model, lacking one variable. The single variable (green circle) has information that overlaps (light green) with the reduced model and a unique contribution (dark green) that increases the full model’s information. (B) Top row: Cross-validated explained variance (cvR²) maps for different single-variable models. Bottom row: Unique model contribution (ΔR²) maps for the same variables. (C) Explained variance for single model variables, averaged across cortical maps. Shown is either cvR² (light green) or ΔR² (dark green). The box shows the first and third quartiles, inner line is the median over 22 sessions, whiskers represent minimum and maximum values. Prev.: previous. (D) Explained variance for variable groups. Conventions as in (C). (E) ΔR² map for each variable group. (F) ΔR² for variable groups at each time-point, averaged across cortex. (B-F) (n=22 sessions).