Fig. 6. Ramp-and-hold stimulation of the femoral chordotonal organ (fCO); movement response (attached-flag method). (A) Original recording from a male middle leg. Top trace, femur–tibia angle (the dotted reference line indicates the steady-state position reached after apodeme extension); bottom trace, fCO stimulus (amplitude 100 µm). For a definition of the position-sensitive and velocity-sensitive portions of the response, see inset in C. (B) The amplitude of the velocity-sensitive response component (for a definition, see inset in C and text) plotted versus stimulus velocity; pooled data from eight animals (means ± S.D.; n=1–4 per animal). With the exception of two animals, only flexion movements were evaluated. The shaded line shows the corresponding curve for Carausius morosus (Bässler, 1993). The standard deviation was not calculated for the first (left-hand) two data points because the data were not normally distributed. (C) The half-life of the decrease in the velocity-sensitive portion of the response plotted versus stimulus velocity. Same data set as in B.