Fig. 6. Mean values (± s.e.m.) of kinematic variables. (A) Maximum
x length of moving zone, xm. (B) Maximum
x length of static zone, xs. (C) Maximum number
of crossings, Ncr,max. (D) Change in the number of
crossings during a cycle,
Ncr. (E) Mean angle of
crossings,
cr. The downhill data were omitted from A and B
because snakes did not stop periodically.