Overview
- The study published this week in Med reports that four young adults with chronic thoracic AIS A/B injuries regained standing and the ability to walk with a walker after implantation of a commercially available epidural stimulator and tailored therapy.
- Researchers call the method trunk-mediated control because a small voluntary trunk extension—about nine degrees—alters the anatomical relation between spinal roots and implanted electrodes so the same stimulation evokes either weight‑bearing extension or coordinated flexion for stepping.
- Those gains depended on implantation plus a daily, progressive and individualized four-month rehabilitation program that trained participants to use trunk motion to trigger and shape electrically evoked leg patterns.
- Measured improvements were concrete but stimulation-dependent: all four rose from WISCI II 0 to 9, one walked 132 meters continuously, and participants navigated slopes and uneven surfaces, yet none recovered voluntary leg muscle contraction.
- Authors and clinicians say this is an early, four-person feasibility result that requires replication in larger, more diverse cohorts, standardized programming and rehab protocols, and clinical trials before it could become a routine therapy.