Feasibility Assessment of Neurophysiological Measurement in Veterans With LBP

Participants will receive a lumbar SMT technique previously described in the literature and commonly utilized for the treatment of low back pain . The SMT will be performed four times (two times on each side) in a 5-minute period. In addition, the following will be performed: Functional MRI, Behavioral: Pain Sensitivity Testing, Questionnaires,Behavioral: Physical Impairment.

"Participants in this group will lie prone. The therapist will place both hands in contact with the participants' pelvis across the top of the posterior aspect of the sacrum and ilia and apply a downward force to keep the pelvis in contact with the table. This group accounts for effects of time and personal contact. The amount of hands-on contact will be equivalent between groups. Both groups will be given the same verbal instructions regarding the techniques performed. In addition, the following will be performed: Functional MRI, Behavioral: Pain Sensitivity Testing, Questionnaires,Behavioral: Physical Impairment."

Both groups will receive an fMRI.

Both groups will receive an Pain Sensitivity Testing

Both groups will receive Questionnaires

Both groups will receive testing on physical impairment.