Fig. 5.

Example intra- and interlimb muscle synergies during slip and nonslip trials. A: example fall and recovery muscle synergies with 95% confidence intervals (CIs). Muscle contributions with 95% CI that did not include 0 were considered significantly active muscles (filled, solid borders). Those that included 0 were considered not significantly active (transparent, dashed borders). Muscle synergies were classified as intralimb if they contained contributions from either significantly active right or left leg muscles. Interlimb muscle synergies were those that received contributions from right and left significantly active muscles. B: subjects who fell during the slip trial (red bar) used significantly larger % of interlimb muscle synergies during nonslip trials than subjects who recovered (gray bar). Average % of interlimb muscle synergies per subject is denoted by circles (filled circles, fall; open circles, recovery). C: subjects who fell during the slip trial (red bar) used significantly larger % of interlimb muscle synergies during the slip trial than subjects who recovered (gray bar). TA, tibialis anterior; MGAS, medial gastrocnemius; VLAT, vastus lateralis; BFLH, biceps femoris long head.