Fig. 6.

Stimulating the left sacral dorsal root (S2) activates a rhythmic locomotor pattern in SMAΔ7 mice. A: integrated ventral root activity recorded from the right L2 and L5 ventral roots and from the left L5 ventral root. S2 dorsal root was stimulated with 50 pulses at 4 Hz and 15 mA (1.5× threshold for rhythmic activity indicated by the stimulus train). B: phase relationships between the L1–L2 and L5–L6 roots on the same side (i), L1–L2 and L5–L6 roots on opposite sides (ii), and L1–L2 roots on opposite sides (iii) of SMAΔ7 mice (grey circles and arrow) are similar to wild-type (black squares and arrow). Data are phase values taken from 5 SMA and 9 wild-type mice.