<s>[INST] I have RSD and nerve damage to my left quad muscle after knee surgery.  it's been 3 years now, and it's still "dead" and I can't walk correctly.  Tried electrical stimulation, etc.  Nothing gets this quad to "fire".  Will I ever be able to walk again without having a functioning quad? [/INST] Hello, If there is loss of power of quadriceps muscle since last 3 years then there is only one option and that is surgery. Such cases also happen in polio patients. In that case, the hamstring muscles which are at back of our thigh are transferred anteriorly. Although this does not help in gaining complete normal movement, it is very helpful in doing routine tasks. Hope I have answered your question. Let me know if I can assist you further. Regards, Dr. Mukesh Tiwari, Orthopedic Surgeon </s>