Fig. 9. (A) Measured muscle-fibre orientations at 2 d.p.f. (corresponding to Fig. 8A). Note the scale differences between panels. Every muscle fibre is represented by the projection of a unit vector on a transversal plane. The length of the unit vector is shown at the bottom left-hand side. (B,C) Idem for 15 and 51 d.p.f. B corresponds to Fig. 8B. (D–F) Computed strain distribution in the muscle fibres at the convex side (left) and the concave side of the body (right), for the same developmental stages as those of (A–C), and a normalized curvature =5. Values of _med and p (Eqn 25) that gave the least variation in strain (i.e. smallest vales of ||) were used. The position of each muscle fibre is indicated by a small circle, with a fill color representing the computed strain according to the labeled color bar. The muscle fibres from the left and the right-hand side were pooled for this purpose. Thus, the mirror image of all measured fibres from the left-hand side were added to the ensemble of fibres at the right-hand side, and vice versa. The asterisks in C denote regions with abrupt changes in the muscle fibre directions.