Fig. 2.

The microtubule orientational field in the spindle corresponds to a bispherical orientational field. (A) Averaged orientational fields corresponding to the different spindles in Fig. 1A where $\theta$ is the orientation angle respect to the spindle long axis. (B) Prescribed orientational field $\mathbf{p}={\mathbf{e}}_{\xi }/\left|{\mathbf{e}}_{\xi }\right|$ according to the shape parameters measured using the retardance signal. The angle range is chosen for visualization purposes. (C) Comparison between the prescribed orientational field in B (red dashed lines) and the averaged experimental orientational field in A (solid lines) for different sections along the spindle long axis (Upper) and along the spindle short axis (Lower). The shaded error bars correspond to SD.