It is the protocol of Fecobionics test in normal subjects. Briefly, the device will be inserted into participants' rectum and several motions (cough, squeeze, straining) will be done. After the motions, the bag will be inflated, and the participant may have different sensations during inflation. If the device falls out before the completion of the test, it will be re-inserted gently. Data will be recorded and shown in real time.
Each participant will be tested up to 4 times at following dates: The day before percutaneous nerve evaluation (PNE) (pre-PNE), one day after PNE (day 1), seven days after PNE (day 7), and thirty days after sacral nerve stimulation (SNS) treatment (day 30 post-SNS).