Fig. 4.

Poststimulation inhibitory effect of tibial nerve stimulation is evident during repeated CMG testing. A: bladder capacity was not significantly changed during repeated CMGs in the absence of nerve stimulation. Note: after the initial and 5th CMG, the bladder was maintained for 30 min in a distended condition and exhibited rhythmic contractions. B: bladder capacity was significantly increased after a 30-min tibial nerve stimulation following the initial CMG, but was not further increased after the second 30-min tibial nerve stimulation. Five repeated CMGs (1st-5th and 6th-10th) were performed within 1.5–2 h after each 30-min period of stimulation. The vertical dashed line indicates the control bladder capacity. Infusion rate: 1 ml/min. The horizontal black bar indicates the 30-min tibial nerve stimulation. Stimulation: frequency 5 or 30 Hz; pulse width = 0.2 ms; intensity 9 V (3 T).