Document Type


Publication Date



Physical Therapy

Faculty Advisor

Michael Ross, PT, DHSc, OCS


Low level laser therapy is a modality that uses specific wavelengths of light to aid the treatment of a variety of musculoskeletal disorders. One use for low level laser therapy is pain modulation. The physiological mechanisms of low level laser therapy are not fully understood when applied for pain modulation. However, recent evidence suggests that pain is thought to be modulated through the use of low level laser therapy by increasing nociceptive threshold, increasing endorphin production, accelerating the healing of underlying damaged tissues, and relaxing muscles that may be in spasm through vasodilation. This project is a review of the literature with respect to the efficacy of low level laser therapy in pain modulation. If efficacy is found, them appropriate parameters relative to the application of low level laser therapy will also be investigated and provided.