Fig. 5

Movement distribution during reaching. Panel a - Variance Accounted for by the body-machine interface map in the first and last minute of reaching practice. Panel b – Subspace Angle between the subspace of reaching movements and BoMI subspace in the first and last minute of reaching. Constant map group is in black, adaptive map group in red. * represents significant differences after a paired t-test with p < 0.05. Panel c – Subspace angle between the two subspaces of reaching movements computed over the first and the last minute of reaching. Constant map group is in black, adaptive map group in red. Panel d – The X-axis represents the Variance Accounted for by the BoMI subspace in the last minute of reaching (as in panel A) for the participants of the Constant map group, while the Y-axis represents the percent change in movement variance during the last minute of reaching relative to the movement variance during calibration. The red line shows the linear model fit of the data. Panel e – Example of projection of the movement distribution during the last minute of reaching over the calibration subspace and over the subspace computed by taking the first two principal components of movement variance. The top figures show the projection in 3D using the 3rd principal component with variance λ₃ as z-dimension, the bottom figures show the projection onto the first two principal components