Multiscale computational model of Achilles tendon wound healing: Untangling the effects of repair and loading
Fig 8
Rat hindlimb model implemented in OpenSim used joint angles, muscle activation, and passive tendon properties as inputs to determine tendon strains.
(A) Hip (brown) and knee (magenta) angle data from healthy rat gait measured by Garnier et al. [41] and ankle angle data measured by Liang et al. [42] in both unrepaired (blue) and suture-repaired (red) tendons. Black dashed line separates stance phase (first 75%) from swing phase (last 25%). (B) Depiction of model motion during the prescribed gait cycle. The color of the muscle fiber depicts the activation during that part of the gait cycle, ranging from maximum activation (1, red) to minimum activation (0, blue). Purple fibers (shown during the swing phase at 90%) depict the transition from maximum to minimum activation. (C) Final tendon strain output was calculated by taking the average (thick blue) of tendon strains in the lateral (purple) and medial (green) gastrocnemius and soleus (orange) musculo-tendon units.