New nerve stimulation may ease back pain without harming muscles

Copied word for word from the study's registry entry, so the wording is the study team's rather than ours.

Inclusion Criteria: 1. Age range (18-80 years): The age range of the patient population at Hershey Medical Center with facet pain is 24 to 90 years old, with a mean age of 63 years old. Due to the physical tests planned in the study, the maximum age limit will be restricted to 80 years old. 2. English Speaking: Adults who only speak other languages will not be included because of the lack of feasibility of employing reliable instruments and interviewers fluent in other languages. 3. Facet Joint Pain: male and female patients having a diagnosis of facet joint pain based upon accepted diagnostic criteria (i.e., two positive nerve blocks) and assessed by an experienced physical therapist or physician. 4. Indication for Surgical Procedure: Physical therapy is the first line of action for facet joint pain. If PT is not effective, patients are eligible for RFA or PNS. Exclusion Criteria: 1. Previous Spinal Conditions Surgery: We will exclude patients with other spinal conditions like scoliosis or who have received previous spinal surgeries. 2. Systemic neurological or neuromuscular disease: Such disorders (e.g., stroke, muscular dystrophy, myopathies) affect muscle and may confound muscle data and/or balance and physical performance data. 3. Allergic reaction to ultrasound gels: It is possible, although rare, that patients develop allergic reaction to ultrasound gels. Those subjects will be excluded from the study. 4. Physical Activity: Subjects will be asked to fill out the Physical Activity Readiness Questionnaire (PAR-Q), and if they answer yes to any of the questions, they need to be cleared by their physician prior to participating in the study. 5. Current infection, illness, or condition: Individuals with a current infection, illness, or condition (e.g., uncontrolled blood pressure, pregnancy) that may affect their ability to safely participate will be excluded. 6. Mental incompetency: Individuals who cannot legally consent themselves to the surgical procedure and participation in the research study, will not be considered for inclusion. 7. Patients who have a Deep Brain Stimulation (DBS) system. 8. Patients who have an implanted active cardiac implant (e.g. pacemaker or defibrillator). 9. Patients who have any other implantable neuro-stimulator whose stimulus current pathway may overlap with that of the SPRINT System.