Home Neuromodulation for Neurogenic Bladder Management in Spinal Cord Injury

Inclusion Criteria:

* Non-progressive chronic (\>1 year) SCI
* Neurologic level of injury T9 and above
* Stable over active bladder (OAB) medications (≥3 months)
* No contraindication to MRI (per MRI Safety Questionnaire)
* English or Spanish speaking
* Tolerate and be able to evoke toe flexion bilaterally with transcutaneous tibial nerve stimulation (tTNS) (self or assisted)
* Pass the tTNS competency checklist to perform or direct performance of tTNS.

Exclusion Criteria:

* Ongoing/active genitourinary oncologic diagnoses
* History of other central nervous system disorder (CNS) disorders and/or peripheral neuropathy
* Pregnancy or planning to become pregnant.
* Lower Motor Neuron bladder
* Restorative bladder surgery such as augmentation cystoplasty
* Botulinum toxin-A injections in the bladder within 6 months of trial enrolment (injection in other sites is allowed)
* Anticoagulation treatment or prophylaxis
* Advanced peripheral vascular disease (gangrene, amputation, etc.)
* History of intolerance to electrical stimulation, particularly of the leg