Surface Electromyography (SEMG) is a twenty first century technology which enables the doctor to monitor the response of chiropractic care in establishing spinal muscle balance. The difference SEMG makes is the difference between the doctor of yesterday and the doctor of tomorrow. SEMG enables the doctor to monitor the state of a patientís nervous system; the ability to watch it recover from stress and therefore, the ability to monitor how the individual responds to chiropractic care.