Figure 4

Time-frequency comparison of sEMG using STFT. (Left) The comparison of sEMG spectral power between pre-exposure and post-exposure affected limbs shows that FDI, APB, and ECRL muscles have overall decreases in spectral power during portions of the trials. (Right) The comparison of sEMG spectral power between post-exposure affected and less-affected limbs does not show significant spectral changes except for ECRL. The color of the boxes indicates the difference between the respective limbs normalized to the absolute maximum difference in each grid. Dots indicate a significant difference after accounting for multiple comparisons.