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Fig. 4. Turning vs straight stepping in the intact stick insect. (A) Mean
step length of front, middle and hind legs during inside turning (red, in),
straight stepping (black, str) and outside leg stepping (dark yellow, out) in
mm. (B) Mean angles of the stance phase movement vector between AEP and PEP in
front, middle and hind legs under the three behavioral conditions, given in
deg. Labeling is the same as in A. A 90 deg. angle means a movement
perpendicular to and towards the body, 180 deg. a front-to-back movement
parallel to the body. Significance levels are:
**P<0.01; ***P<0.001; n.s., not
significant. FL, front legs; ML, middle legs; HL, hind legs.