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Fig. 6. Proximal muscle strain (bold lines) and EMG patterns (thin lines) recorded
in vivo during level (red traces) versus incline (blue
traces) locomotion for muscles of various animals (gait indicated in
parentheses on right). Example patterns show increased shortening of the horse
triceps and vastus (Wickler et al.,
2005), the rat biceps (Gillis
and Biewener, 2002) and wallaby biceps femoris
(McGowan et al., 2007), as
well as reduced net lengthening of the wallaby vastus, when moving on an
incline. Stance duration is shown by the light red (level) and light blue
(incline) shading. All muscles are displayed with the same fascicle strain and
temporal scales. For fascicle strain traces, the tick on the scale bar
indicates zero strain.
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