Circular statistical analysis of the phase relations between hindlimb extensor and dorsal muscle activities in vivo.

Coordination patterns between left (L)- and right (R)-side plantaris longus (pl) and dorsalis trunci (dt) muscle activity recorded by EMG. Non-uniformity of circular distributions was verified by the Rayleigh (Z) test, and the V-test (u(0°)) was used to assess burst synchrony. Bold characters highlight statistically random distributions.