Figure 7.

Kinematics of S. mansoni movement under severe confinement. (a) Instantaneous body width of a worm (represented in colour along the worm's centreline) in a 100 µm gap showing three contraction waves. The green and magenta dots indicate the starting (just behind the ventral sucker) and final (500 µm from the posterior tip) positions of the body width measurement. (b) Kymograph of body width represented as a function of time and normalized position along the centreline (1 = anterior end and 0 = posterior end). (c) Instantaneous map of body movement velocities. The arrows represent the direction and magnitude of the velocity vector. The colour maps indicate the velocity and estimated strain (ɛ) in the direction along the worm's centreline. The arrows and colour map have been superimposed on the bright field images. Scale bar = 1 mm. (Online version in colour.)