FIGURE 6.

(A) Frame-by-frame analysis of the movements illustrated in Fig. 5 A. The curvature of the proximal 10 μm of the flagellum is plotted using a mixture of open circles and crosses; the open circles represent video frames illustrated in Fig. 5 A. The curvature is seen to oscillate rapidly until the trailing edge of the antecedent full-sized R-bend (solid circles) has propagated off the tip. Downward deflection of curvature represents cryptic P-bends. (B) Another example of a hesitation cycle from the same headless sperm. (C) Frame-by-frame analysis, as in Fig. 6 A, of the intact specimen illustrated in Fig. 5 B. (D) Another example from a different intact sperm. In all four graphs, the velocity of propagation of the full-size R-bend shows irregularities that may possibly be related to the oscillatory movements on the proximal flagellum.