Leg movements are slower after photoablation of CI₁. A, Maximum angular velocities of the thoraco-coxal, coxo-trochanteral, and femoro-tibial joints for scratches aimed at anterior (a) and posterior (p) target stimulation sites. Gray bars, CI₁ intact; black bars, CI₁ photoablated. When the reduction in velocity was significant (Mann–Whitney U test with Holm-Bonferroni correction for repeated sampling), the corresponding “a” or “p” is circled. B, Mean angular velocities; details as for A. Data are from N = 10 animals, n = 38 anterior and 114 posterior scratches for CI₁ intact scratches and 64 anterior and 157 posterior scratches for CI₁ photoablated. Dep, Depression; Lev, levation; Flex, flexion; Ext, extension. Levation and extension velocities are negative by definition. Therefore, larger negative values indicate faster levations and extensions. Larger positive values indicate faster depressions and flexions. Asterisks indicate extreme outliers (>3 times interquartile range).