Evaluating Safety and Feasibility of Transcutaneous Spinal Cord Stimulation Following Traumatic and Non-Traumatic Spinal Cord Injury: A Pilot Study

Inclusion Criteria: * Age: = 18 years and = 80 years. * Written informed consent by patient and/or legal authorized representative (LAR). * No other life-threatening condition. * No evidence of sepsis. * No evidence of superficial skin infection at site of surgery and intervention. * An established diagnosis of either: * cervical myelopathy with modified Japanese Orthopaedic Association score of 8-14, or * acute cervical / thoracic SCI with ASIA Impairment Scale grade A-D (as assessed within 72 hours of injury) with neurologic level of injury (NLI) from C2 to T12. * The ability to undergo, or have had, surgical intervention. -. The ability to undergo transcutaneous intervention including study procedures in the posterior cervical or thoracic midline at or after 14 days from surgery. Exclusion Criteria: * Any concomitant impairment of the upper and lower limb at baseline that could potentially confound the neurologic assessments; including but not limited to traumatic or disease conditions like brachial plexus injury, peripheral neuropathy, spinal hematoma, transverse myelitis, non-compressive myelopathy, dementia, and Parkinson's disease. * mJOA of \>= 15 and \<= 7, or AIS grade E tSCI at baseline assessment. * Currently involved in another non-observational ntSCI or tSCI study, or receiving another interventional drug, that could interfere with recordings and confound adverse events. * Other illness (including mental disorder) that could preclude accurate medical and neurological evaluation, at discretion of the treating surgeon and/or principal investigator. * Unable to commit to the follow-up schedule. * Recent history of regular substance abuse (illicit drugs, alcohol), which in the opinion of the investigator would interfere with the subject's participation in the study. * Any condition likely to result in the patient's death within the next 12 months. * Prisoner. * Pregnancy. * Cardiac pacemaker dependent, unable to undergo electrical stimulation. * Brain implant, skull prosthesis, plate and screws limiting transcranial stimulation. * Tattoo at site of skin electrode that causes heat/pain during stimulation. * Subjects who in the opinion of the investigator are not suitable for inclusion in the study, with reason documented.