spacer gif spacer gif spacer gif spacer gif spacer gif
QUICK SEARCH:   [advanced]


spacer gif
     Home     Help     Feedback     Subscriptions     Archive     Search     Table of Contents    

Right arrow Help viewing high resolution images
Right arrow Return to article

(Downloading may take up to 30 seconds.
If the slide opens in your browser, select File -> Save As to save it.)
Click on image to view larger version.


Figure 7


Fig. 7. Shifts of extreme positions due to perturbation. Top view of shift vectors, indicating the mean shift of extreme positions of the perturbed right front leg (rFL), the contralateral left front leg (lFL), and the ipsilateral right middle leg (rML). As reference, mean unperturbed PEPs (filled circles) and AEPs (open circles) are shown for the three legs. Different walking contexts are shown: (A), inner leg; (B), straight walking; (C), outer leg. Arrow length indicates the spatial extent of the shift. Statistical significance was tested for mean direction of the shift. Significance levels: ***P<0.001; **P<0.01; *P<0.05. Arcs (solid lines, PEP; dotted lines, AEP) illustrate tangential components of the shift, i.e. the contribution of the front leg and middle leg ThC joints. The impact of perturbation was strongest when the inner front leg was perturbed (A) with significant shifts in all three legs in the perturbed (red arrows) and subsequent step (blue arrows). Shifts were less pronounced if perturbation occurred in straight walking (B) or the outer front leg (C). The mean distance between the prothoracic and mesothoracic coxae was taken from Cruse (Cruse, 1976).





Right arrow Return to article