The Dilemma of the Multifidus

Allison Ariail, PT, DPT, CLT-LANA, BCB-PMD, PRPC is a published researcher and practitioner who has worked in the realms of brain injury, lymphedema, and oncology. Now she's leading the charge to encourage rehabilitation practitioners to utilize ultrasound diagnostic imaging with their patients, and you can learn these techniques in her Rehabilitative Ultrasound Imaging - Women's Health and Orthopedic Topics course taking place May 1 - 3 in Dayton, OH. We've partnered with SonoSite to make the best ultrasound equipment available for participants in this course.

Most of us are treating patients who have back pain of some nature, and we know the importance of the local stabilizing muscles including the transverse abdominis, the lumbar multifidus, and the pelvic floor muscles. These muscles work together to provide tension and create a corset of stability throughout the trunk. A common goal is to rehabilitate these muscles in order to restore motor control and strength, but the muscle depth can make them difficult to assess and palpate.

I recently read a study that is looking at the development of a test to identify lumbar multifidus function. Herbert et al. found promising results when looking at this “multifidus lift test” for inter-rater reliability and concurrent validity to identify dysfunction in the multifidus. They compared the results of this test with real-time ultrasound imaging of the lumbar multifidus. Inter-rater reliability was excellent and free from errors of bias and prevalence. Concurrent validity was demonstrated through its relationship with the reference standard results at L4-L5, but not so much for L5-S1. This preliminary research supports the reliability and validity of the multifidus lift test to assess lumbar multifidus function at some spinal levels. If this test could be further validated for other spinal levels it would be very beneficial for therapists who are using a specific stabilization program to treat patients.

Until this test is further developed and validated how can therapists know for sure that their patient is truly activating their multifidus? Ultrasound imaging is the answer! Ultrasound imaging gives therapists real-time feedback for whether a patient is able to correctly activate a muscle or not. It is also a wonderful biofeedback tool for patients who are trying to rehabilitate these muscles. Getting your hands on an ultrasound machine can be tough, but therapists who work in a hospital system may have an easier time than you'd think. I have worked with many therapists to help them get access to ultrasound units through “hand me down” units from imaging or labor and delivery departments. I also have helped private practice therapists set up a working relationship with a physician who has an ultrasound in their office. Thinking outside of the box can allow clinicians to gain access to ultrasound units without having to spend a lot of money. Join me in Dayton Ohio this May to hear more about how ultrasound imaging can improve your practice and allow you to incorporate a specific stabilization program into your toolbox.

Herbert JJ, Koppenhaver SL, Teyhen DS, Walker BF, Fritz JM. The evaluation of lumbar multifidus muscle function via palpation: reliability and validity of a new clinical test. Spine J. 2015; 15(6): 1196-202.