Combining Spinal Cord Transcutaneous Stimulation and Activity-based Training in Inpatient Rehabilitation to Facilitate Upper Limb Function of Individuals with Acute to Subacute Cervical Spinal Cord Injury

Inclusion Criteria: * must be at least 18 years of age. * must have had a spinal cord injury for less than or equal to 8 weeks. * must have a traumatic cervical SCI with lesions (AIS A or B, C5-C7). * must have some degree of motor dysfunction in the hand (bilateral UE motor score \<25). * must be medically stable enough to participate in activity-based recovery training. * must be able to tolerate spinal cord transcutaneous stimulation, as determined by study staff. * must have ability to understand and the willingness to sign an informed consent. Exclusion Criteria: * have a history of seizures, head trauma and/or cognitive deficit * have surgically implanted foreign bodies such as a pacemaker, metal plate in the skull, and metal inside the skull * have a pressure sore or skin issues. * have severe spasticity. * in medically unstable condition. * have a history of illicit drug abuse. * have a history of medical disorders of my heart, lungs, bladder, kidneys or other parts of my body that are unrelated to my spinal cord injury. * unable or unwilling to wean from anti-spasticity medication (for an example: baclofen, Xeomin, and Lioresal). * unable to meet the attendance requirements. * currently enrolled in another interventional research study. * unable to follow instructions and maintain alertness during assessments and training.