I suffered a SCI & TBI in 2002. I was lucky to walk 6 months after. I have brown sequard SCI. My left side is my weak side. 2/5 in strength (hand, leg, etc.) Is there anything out there I can try to get my left side stronger? Stem Cells? Spine Stimulation? I tried 4ap like 10 years ago but my body didn't really like it.