Control signal dimensionality depends on limb dynamics
Fig 5
Correlations between the temporal eigenvectors derived from EMG and muscle torques.
Dots show maximal R2 values from individual cross-correlations between profiles in Fig 3, 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; MT V1 and MT V2 are the 1st and 2nd eigenvectors obtained from muscle torques, respectively; MTP V1 and MTD V1 are the 1st eigenvectors obtained from the postural and dynamic components of muscle torque, respectively. Brackets and stars show significant differences summarized in Table 2.