Observational StudyImprove Dynamic Lateral Balance of Humans With SCI

Inclusion Criteria:

1. age between 18 and 65 years;
2. medically stable with medical clearance to participate;
3. level of the SCI lesion between C4-T10;
4. passive range of motion of the legs within functional limits of ambulation;
5. ability to walk on a treadmill for more than 20 minutes with partial body weight support as needed and short sitting/standing breaks;
6. ability to ambulate without orthotics or with orthotics that do not cross the knee for more than 10 meters

Exclusion Criteria:

1. the presence of unhealed decubiti, existing infection, severe cardiovascular and pulmonary disease, concomitant central or peripheral neurological injury (e.g. traumatic head injury or peripheral nerve damage in lower limbs);
2. history of recurrent fractures and/or known orthopedic injury to the lower extremities;
3. Botox injection within 6 months of starting the study, and current receiving physical therapy treatment;
4. have metallic implantation in the spinal region underneath where electrodes may be placed.