Fig. 10. Cross-correlations between right and left antennal movements in walking. The data were from the same animal as in Fig. 9. (A) Trajectories of both antennae were still random, and their scanning areas were smaller than those seen during pausing (cf. Fig. 9A). (B) Cross-correlation for horizontal components. Significant negative correlations existed close to the zero time lag as relatively compact spreads along the ordinate (compare with Fig. 9B). Inset shows expansion of the boxed area (1). Though individual small waves did not exactly synchronize with each other, coordination is recognizable in both larger and slower components. (C) Cross-correlation for vertical components. Significant positive correlation spots were continuously observed over the map at zero time lag as sharp peaks. Expansion of the boxed area (2) shows synchronization of the pair of waves at 2–3 Hz. Note the time scale difference from Inset 1.