Control signal dimensionality depends on limb dynamics
Fig 6
Postural and dynamic scores from PCA on EMG for outward and inward reaches.
Dots show individual scores averaged across muscles and movement directions, red lines show mean values, and grey boxes show standard deviations. EMG V1 and EMG V2 are the 1st and 2nd eigenvectors obtained from EMG, respectively. Llat and Lmed indicate reaching with the left arm in lateral and medial workspaces, respectively; Rlat and Rmed indicate reaching with the right arm in lateral and medial workspaces, respectively.