Fig. 3.

Patterns of modulation of PAD amplitude in two SmAB group I fibers recorded in a spinal cat (A) and before spinalization (B). Topto bottom, Phase plots of the averaged amplitude of PADs (with SDs) as a percentage of the maximal response (*p < 0.05, bins significantly different from other bins); and averaged and rectified ENG activities representing the flexor (F) and extensor (E) phases of the fictive step cycle (separated by dotted line), which are also represented by boxes F andE at the bottom. N, Number of averaged locomotor cycles.