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. Author manuscript; available in PMC: 2010 Jun 10.
Published in final edited form as: Exp Brain Res. 2008 Jul 9;190(1):53–69. doi: 10.1007/s00221-008-1451-4

Figure 2.

Figure 2

Normal rat. Vertical (weight bearing) force and motion. A. video measure of the vertical excursion of a fixed point on the rat’s back (units in mm). B. stance phases (horizontal solid bars) of each leg obtained from video. Note that the gait is a variable diagonal trot merging with a lateral walk, as shown by LFL RHL near synchronous footfall, with LFL leading. C. vertical weight support forces. Solid bold trace: sensor 1 vertical force measurement. Dotted bold trace: sensor 2 vertical force measurement. The dotted vertical lines extending below indicate transition between sensors (Phase II). Phase I: rat wholly on sensor 1. Only solid line force is non-zero. Phase II spanning sensors. Net vertical force is sum of solid and dotted traces. Phase III: wholly on sensor 2. Only dotted trace is non-zero. Abscissa for all plots: time in seconds. RHL : right hindlimb. RFL: right forelimb. LHL: left hindlimb. LFL: left forelimb.