Tibial Nerve Stimulation for Pediatric Spina Bifida Neurogenic Bladder

Inclusion Criteria: * chronic neurogenic bladder * Spina Bifida diagnosis * Use of overactive bladder medication(s) * Stable bladder medications for ≥ 3 months Exclusion Criteria: * Progressive SCI (ex: transverse myelitis, polio, etc.) * Other lower urinary tract pathology or surgery * 2+ pitting edema in the legs that does not resolve * Known peripheral neuropathy or injury to the path of the tibial nerve * Cancer in the tibial nerve pathway and/or lower urinary tract * Inability to elicit the motor response with electric stimulation * Inability to complete the tTNS proficiency checklist (guardians) * Non-English speaking (guardians)