Fig. 3. Force transients produced by the tergal depressor of trochanter (TDT)
muscle in the two wild-type strains [Canton-S (CS) and Texas (TX)] and two
mutant lines: M18 and hono. For each fly, the traces show
responses to both sub-threshold and supra-threshold stimuli given at 15
s intervals. Scales: stimuli, 2 V; strain gauge output, 10 mV.