Ultrasound Examination of the VMO in Patellofemoral Pain Syndrome

Inclusion Criteria: * Between the ages of 18 and 65 * Have had localized pain in the front of the knee for at least the past 3 months * Experience pain during activities that require stair climbing, squatting, prolonged sitting, or knee flexion * Have been diagnosed with patellofemoral pain syndrome based on clinical evaluation * Volunteer to participate in the study and sign the informed consent form Exclusion Criteria: * History of previous surgery on the knee joint * History of significant trauma to the knee region within the last 6 months * Diagnosis of meniscus, ligament injuries, knee osteoarthritis, or inflammatory rheumatic disease * Neurological diseases or systemic diseases affecting the musculoskeletal system * Presence of other lower extremity pathologies causing pain at a level that could affect measurements