Repeated stimulation of sacral dorsal root (DRT) S1–S3 did not produce post-stimulation inhibition of bladder overactivity induced by AA irritation. (A) Control CMGs before and after repeated (three times at 5, 15, and 30 Hz) S1, S2, or S3 DRT stimulation (2–10 min each time). (B) Bladder capacity was not changed after repeated S1, S2, and S3 DRT stimulation.