In some patients this muscle doesn’t reactivate once the painful stimuli is gone, and gradually under goes fatty atrophy (turns to fat). This treatment implants a small stimulator under the skin, and targets the multifidus muscle to restore strength and function. In the FDA trial over 70% of patients with chronic low back pain reported significant improvements in pain and quality of life. Compared with a fusion (the standard treatment for chronic back pain, this has minimal risks and is reversible if not successful.