Figure 5. Depression of cutaneous field potentials during fictive locomotion.

A, B, D and E, depression of fields evoked by stimulation of SP (depth 1.2 mm), sural (depth 2 mm), Tib (depth 2 mm) and SPud (depth 1.7 mm) nerves during fictive locomotion (continuous traces, locomotion; dotted traces, control). These fields were recorded in the L6-S1 segments in the same experiment. C, sural field from another experiment. In this panel only, dotted lines indicate standard errors of the means (for clarity plotted on only one side of the mean). Although the overall depression of this field potential was small, the small standard errors show that it was nevertheless genuine. Same format as in Figs 1 and 3.