Volunteers between the ages of 18-65 years are needed for a study to better understand how the brain is involved in low back pain. Individuals who have current low back pain, who have recovered from low back pain, and those who have never had low back pain may be eligible. This is not a treatment study. Compensation for time and travel will be provided for eligible volunteers. Please call (650-723-3032) or email (backpainstudy@stanford.edu) for more information