If you work with orthopedic patients, I am sure that you have had a back-pain patient that you have discharged, only for them to return a year later suffering from another episode of pain. We all know that once someone suffers from a back injury, they are more likely to develop a chronic issue. Even patients with insidious back pain and no specific injury often develop chronic issues and can have pain that waxes and wanes after the initial episode.
What happens in the body to cause this? Most of us have learned that the pelvic floor, transverse abdominus, and the deep fibers of the lumbar multifidus play an important role in stabilization. With injury, these muscles can become less effective in stabilizing the spine and pelvis. Studies have shown that muscle atrophy in the lumbar multifidus has been shown to occur with injuries and persist after resolution of the pain.1
I recently did additional research to find out other reasons that cause these local stabilizing muscles to not function optimally. I found that these muscles also can suffer from arthrogenic muscle inhibition after an episode of low back pain.2 Arthogenic inhibition is a deficit in neural activation to a muscle. It is thought to occur due to a change in the discharge of articular sensory receptors due to swelling, inflammation, joint laxity, and damage to afferent nerves.2 EMG studies have shown reduced neural activity in the deeper fibers of the multifidus in patients with back pain.3
Another thing that fascinated me was that cortical changes in the brain also occur with low back pain. Changes in cortical representation of the multifidus and the body’s ability to voluntarily activate the muscle has been noted.4 Motor retraining has been shown to reorganize the motor cortex with regards to the transverse abdominus.5 Also, improvement in brain organization and function occurs after resolution of back pain.6
This is good news for patients! As therapists, we may not be able to do anything with respects to arthogenic inhibition. However, we can work on motor retraining for the core muscles. It has been shown that specific training that targets the multifidus can restore the neural activity to the multifidus and lead to improvement of pain and function.7,8 Training the multifidus can be difficult for therapists to teach. However, studies have found that ultrasound guided biofeedback is helpful for patients to learn to contract their multifidus.9,10
Come learn more about the multifidus and how it relates to back pain and stability. In Rehabilitative Ultrasound Imaging: Women's Health and Orthopedic Topics we will go over how to help your patients learn to activate and strengthen their multifidus. Join me on February 28 - March 1st in Raleigh, NC to learn new ways to help your patients!
1. Hides JA, Richardson CA, Jull GA. Multifidus muscle recovery is not automatic after resolution of acute, first‐episode low back pain. Spine 1996;21:2763–2769.
2. Russo M, Deckers K, Eldabe S, et al. Muscle control and non-specific chronic low back pain. Neuromodulation: Technology at the neural interface. 2018; 21 (1): 1-9.
3. D'Hooge R, Hodges P, Tsao H, Hall L, Macdonald D, Danneels L. Altered trunk muscle coordination during rapid trunk flexion in people in remission of recurrent low back pain. J Electromyogr Kinesiol 2013;23:173–181
4. Massé‐Alarie H, Beaulieu L‐D, Preuss R, Schneider C. Corticomotor control of lumbar multifidus muscles is impaired in chronic low back pain: concurrent evidence from ultrasound imaging and double‐pulse transcranial magnetic stimulation. Exp Brain Res 2015; 234:1033–1045.
5. Tsao H, Galea MP, Hodges PW. Driving plasticity in the motor cortex in recurrent low back pain. Eur J Pain 2010;14:832–839.
6. Seminowicz DA, Wideman TH, Naso L et al. Effective treatment of chronic low back pain in humans reverses abnormal brain anatomy and function. J Neurosci 2011;31:7540–7550
7. França FR, Burke TN, Caffaro RR, Ramos LA, Marques AP. Effects of muscular stretching and segmental stabilization on functional disability and pain in patients with chronic low back pain: a randomized, controlled trial. J Manipulative Physiol Ther 2012;35:279–285.
8. Goldby LJ, Moore AP, Doust J, Trew ME. A randomized controlled trial investigating the efficiency of musculoskeletal physiotherapy on chronic low back disorder. Spine. 2006;31:1083–1093.
9. Ghamkhar L, Emami M, Mohseni‐Bandpei MA, Behtash H. Application of rehabilitative ultrasound in the assessment of low back pain: a literature review. J Bodyw Mov Ther 2011;15:465–477.
10. Van K, Hides JA, Richardson CA. The use of real‐time ultrasound imaging for biofeedback of lumbar multifidus muscle contraction in healthy subjects. J Orthop Sports Phys Ther 2006;36:920–925
Ultrasound imaging is being used more frequently in the physical therapy clinical setting. Physical therapists are using ultrasound (US) imaging in varying ways. Some are using it as a training tool for the patient to learn neuromuscular control. Others are using it to guide needle placement while performing dry needling. In a recent article authored by several well-known physiotherapists, the various uses of US imaging were defined, as well as discussions regarding the scope of practice, and training for physiotherapists using ultrasound imaging.
Four uses of US imaging have been reported by physical therapists. The first and most common use of US imaging is the evaluation of muscle structure and function to aid in neuromuscular control. Essentially, the US images are being used as a source of biofeedback. This has been coined Rehabilitative Ultrasound Imaging (RUSI). Additional uses have emerged in recent years including Diagnostic US imaging which is the diagnosis and monitoring of pathology; and interventional US imaging which is using the US images to guide percutaneous procedures involving dry or wet needling. These three categories are performed during clinical care and fall under the umbrella term “point of care ultrasound.” The last category of US imaging use in physical therapy is paired with performing research.
In this article, some thoughts and areas for improvement were brought to light regarding each type of US imaging as well as the scope of practice and training for each type of US use. It was mentioned that RUSI sits almost entirely within the scope of the physical therapy profession, however, it can be difficult for therapists to receive training for this use. Therapists interested in learning diagnostic or interventional US imaging have more options for training because these uses of US have established criteria for training, competence, and regulation outlined by the World Health Organization (WHO), as well as oversight from the World Federation for Ultrasound in Medicine and Biology. These programs often are intended for other healthcare practitioners (radiologists, and sonographers), but physical therapists are able to take the courses. However, it was stated that both diagnostic and interventional US imaging do not fall within the scope of practice for a majority of physical therapists around the world. So, although training may be more available for these types of US use; therapists taking these courses gain increased experience with non-physical therapy applications, and therefore are at risk for operating outside the scope of their practice.
The authors continued with distinct recommendations for needed training for the four different types of US imaging. Several of the listed skills were fundamental knowledge that a therapist should obtain before utilizing any of the four types of US into their practice such as basic physics for US, terminology, safety, among other knowledge. Then there were skills that were specific to the particular type of US being performed. Since point-of-care use of US is generally not included as part of entry level physical therapy education programs, this knowledge needs to be obtained in a postgraduate education format. For therapists who wish to learn diagnostic application of US imaging, there are multiple courses available from schools that train sonographers. However, according to this article, the form of US imaging that sits more within the scope of practice for physical therapists, rehabilitative ultrasound imaging, does not have as many educational opportunities as diagnostic US imaging does.
Herman & Wallace offers a course that provides fundamental skills of US imaging (such as history, and knowledge of the physics needed for US imaging), as well as specific skills for real-time ultrasound imaging. The schedule of the course includes a lot of lab time with multiple US units available so the ratio of participant to US unit low. You will leave the course being able to interpret US images and use it as an assessment tool or biofeedback tool for the patient. Using RUSI will change how you treat patients! The Rehabilitative Ultrasound Imaging course is offered three more times this year. Join me in Columbia, MO this August; Madison, WI in September; or Chicago, IL in December to learn how to use this form of ultrasound imaging in your clinical practice!
Whittaker J, Ellis R, Hodges P, et al. Imaging with ultrasound in physical therapy: what is the PT’s scope of practice a competency-based educational model and training recommendations. Br. J Sports Med. Apr. 2019; 0:1-7.
Rehabilitative ultrasound imaging has been used in clinical practice for well over a decade now. It has been used for core stabilization, as well as with female incontinence patients. In recent years, transperineal ultrasound imaging has emerged as a useful tool for assessing prolapses and identifying other women’s health issues in the anterior compartment.
Like other things in men’s pelvic health, the use of ultrasound imaging for rehabilitation has lagged behind that in women’s pelvic health. Ryan Stafford is a researcher that is working to change that. In 2012, Stafford began looking at the normal responses to pelvic floor contractions and what is seen on ultrasound in men. He has since taken his research further to examine differences in men that present with post-prostatectomy incontinence. Stafford, van den Hoorn, Coughlin, and Hodges performed a study looking at the dynamic features of activation of specific pelvic floor muscles, and anatomical parameters of the urethra. The study included forty-two men who had undergone prostatectomy. Some of these men were incontinent and others remained continent. Transperineal ultrasound imaging was used to obtain images of the pelvic structures during a cough, and a sustained maximal contraction. The research team calculated displacements of pelvic floor landmarks with contraction, as well as anatomical features including urethral length, and resting position of the ano-rectal and urethra-vesical junctions.
The data was analyzed and combinations of variables that best distinguished men with and without incontinence were reported. Several important components were identified in the study. Striated urethral sphincter activation, as well as bulbocavernosus and puborectalis muscle activation were significantly different between men with and without incontinence. When these two parameters were examined together, they were able to correctly identify 88.1% of incontinent men. They further reported that poor function of the puborectalis and bulbocavernosus could be compensated for if the man had good striated urethral sphincter function. However, the puborectalis and bulbocavernosus had less potential to compensate for poor striated urethral sphincter function. This is important for a therapist that works with post prostatectomy patients to know. This can explain part of why some men improve and do so well after a prostatectomy and others don’t, even with therapy to help. If the striated urethra sphincter is damaged and its normal responses are changed during surgery, then incontinence after prostatectomy may be more likely.
Using ultrasound imaging, the therapist can examine and see exactly where a man is deficient in response; whether it is the puborectalis, or the striated urethra sphincter. It is exciting to see this new research and see how rehabilitative ultrasound imaging can influence men’s pelvic health! Come and learn how to use ultrasound imaging for your men’s pelvic health patients as well as your women’s health and back pain patients! You will see how ultrasound imaging can change your practice and how much your patients will enjoy seeing real-time images of their contractions! Thanks to our partnership with The Prometheus Group, this course includes hands-on training on the latest in pelvic ultrasound imaging.
1. Stafford R, Ashton-Miller J, Constantinou C, et al. Novel insights into the dynamics of male pelvic floor contractions through transperineal ultrasound imaging. J. Urol. 2012; 188: 1224-30.
2. Stafford RE, van den Hoorn W, Couglin G, Hodges P. Postprostatectomy incontinence is related to pelvic floor displacements observed with trans-perineal ultrasound imaging. Neurol and Urodyn. 2018; 37:658-665.
Image credit Gupta et al. 2016 https://doi.org/10.1016/j.ajur.2016.11.002 https://www.sciencedirect.com/science/article/pii/S2214388216300881#fig2
Authors: Tamara Rial, PhD, CSPS, Kathleen Doyle-Elmer, PT, DPT and Rebecca Keller, PT, MSPT, PRPC
Tamara Rial, PhD, CSPS, co-founder and developer of Low Pressure Fitness will be presenting the first edition of Low Pressure Fitness and Abdominal Massage for Pelvic Floor Care Level 2 and 3 in Princeton, New Jersey in September, 2019. Rebecca Keller and Kathleen Doyle-Elmer are certified Low-Pressure Fitness specialists with training in rehabilitative ultrasound imaging. In this article, the authors discuss and explore the use of transabdominal ultrasound during Low Pressure Fitness on the abdominal and pelvic floor structures.
Real-time ultrasound imaging is a reliable and valid method to evaluate muscle structure, activity and mobility. Over the past few years, there has been increasing interest in the use of transabdominal ultrasound in the field of rehabilitation. The additional value of ultrasound imaging is that it allows for real-time analysis and visual feedback during the performance of pelvic floor and abdominal exercises (Hides et al., 1998). In the field of pelvic health, this is of notable importance when assessing proper movement of the deep abdominal and pelvic muscles during voluntary muscle actions. Transabdominal ultrasound has been found to be a safe, noninvasive, and accurate method to assess and observe muscular and fascial activity (Khorasani et al., 2012). When therapists learn how to properly use and apply ultrasound imaging, this technique can be a comprehensive tool for the clinician and a comfortable procedure for the patient. Moreover, it may be the method of choice for some patients who don’t want to have an internal pelvic examination (Van Delft, Thakar & Sultan, 2015). In this regard, a cross-sectional study found a moderate-to-strong correlation between ultrasound measurements and both digital examination and perineometry for the assessment of pelvic floor muscle actions (Volløyhaug et al., 2016).
Recently, Low Pressure Fitness has gained popularity as a pelvic floor training program aimed at reducing pressure on the pelvic structures while engaging the stabilizing muscles through postural and breathing exercises. In order to evaluate proper execution of Low-Pressure Fitness exercises as well as abdomino-pelvic muscle function during this type of training, real-time transabdominal ultrasound can be a clinically relevant tool.
The amount of movement of the bladder base on transabdominal ultrasound is considered an indicator of pelvic floor muscle mobility during pelvic floor muscle exercises (Khorasani et al., 2012). When properly executed, the Low-Pressure Fitness technique will allow the bladder to lift and the pelvic floor muscles to contract. These observed actions can be cued and progressed due to the real-time imaging biofeedback of the ultrasound. Because of the postural activation and diaphragm lift occurring during Low Pressure Fitness, the bladder fascial support system is tensioned resulting in a desirable bladder lift.
For example, we used a Pathway® Musculoskeletal Rehabilitative Ultrasound Imaging unit with a curvilinear transducer and Prometheus Pathway® rehabilitative ultrasound software utilizing the pre-set parameters (Abdominal Wall 7.5MHz and Bladder 5.0MHz) during a Low-Pressure Fitness basic supine posture. A standardized bladder filling protocol was used before imaging to ensure sufficient bladder filling to allow clear imaging of the base of the bladder and pelvic floor muscles.
For the transverse view, radiologic standards were used, and the ultrasound transducer was placed in the transverse plane suprapubically and angled in a caudal/ posterior direction to obtain a clear image of the inferior-posterior aspect of the bladder. The participant was asked to perform the Low-Pressure Fitness Demeter exercise in the supine position with a neutral pelvis and knees flexed (Figure 1).
The following video illustrates the pelvic floor/urinary bladder during: a) resting position; b) active pelvic floor contraction; c) Low Pressure Fitness Demeter exercise and; d) Low Pressure Fitness Demeter exercise combined with a voluntary pelvic floor muscle contraction. It is noticeable a greater bladder lift and pelvic floor activation with the postural and breathing cueing added to an active pelvic floor contraction than with the pelvic floor contraction alone.
The lateral abdominal muscle ultrasound assessment allows us to observe the structural changes produced in the transversal section of the abdominal muscles in the midpoint between the anterior iliac crest and the costal angle. At low levels of contraction, the extent of transverse abdominis thickening measured using ultrasound is reported to be a valid method of assessment compared with either fine wire electromyographic measures of transverse activity (McMeeken et al., 2004). It is well established in the scientific literature that the lateral abdominal muscles provide stability to the trunk in different functional activities. Therefore, the assessment of the size, thickness and sliding of the abdominal wall is important for patients who present with lumbo-pelvic and/or pelvic floor dysfunctions. In this regard, patients with low back pain show different abdominal wall muscle activation patterns (i.e. less slide of the abdominal fascia and muscle thickness) than those without low back pain (Gildea et al., 2014; Unsgaard-Tondel et al., 2012).
Figure 2 shows the three muscle layers of the lateral wall in the resting position. The superficial layer corresponds to the external oblique, the middle layer to the internal oblique and the deep layer to the transverse abdominal muscle.
A key breathing component of the Low-Pressure Fitness program is the abdominal vacuum which manipulates intra-abdominal, intra-thoracic and intra-pelvic pressures during the breath-holding phase. Another key aspect of Low-Pressure Fitness is the shoulder girdle activation, spine elongation and ankle-dorsiflexion (Rial & Pinsach, 2017). Of note, previous studies have demonstrated greater transverse abdominis activation when performing ankle dorsi-flexion (Chon et al., 2010). We used transabdominal ultrasound to assess the lateral abdominal wall response during ankle dorsiflexion, shoulder girdle activation and the abdominal vacuum during Low Pressure Fitness.
In the following video, a voluntary (active) abdominal contraction is performed in order to distinguish this action from the involuntary abdominal contractions during Low Pressure Fitness. Afterwards, the postural technique of ankle dorsiflexion and shoulder girdle activation are performed in the Demeter exercise with arms in middle position (Figure 1). Lastly, an abdominal vacuum maneuver is added to the postural technique. If the exercises are properly executed, the progressive sliding and thickness of the abdominal muscles throughout exercise sequence should be observable (Figure 3).
Muscle thickness of the transverse and internal oblique as well as a noticeable slide of the anterior abdominal fascia are observable during the Demeter exercise of Low-Pressure Fitness. This exercise pattern reflects an abdominal draw-in maneuver and a “corseting effect”. In this regard, notice the lateral pull or displacement of the edge of the anterior fascial insertion of the transverse the internal oblique muscle.
Navarro et al., (2017) used transabdominal ultrasound to assess the muscular responses of the pelvic floor and abdominal muscles in a group of women who underwent pelvic physiotherapy over two months. They found a significant increase in the transversal section of the transverse abdominis, external oblique, and internal oblique muscles when compared to resting in the supine position. Similar to the position assessed by Navarro et al. (2017), we also assessed the pelvic floor and abdominal muscle responses during a Low-Pressure Fitness supine exercise.
Transabdominal ultrasound can provide a noninvasive and informative visual biofeedback when training patients with Low Pressure Fitness. This ultrasound imaging can be a valuable tool to both the client and the clinician to objectify progress, assist with validating correct Low-Pressure Fitness form with positioning and vacuum/hypopressive maneuver as well as a motivational technique for the client. As demonstrated during our rehabilitative ultrasound imaging, observable bladder lift, pelvic floor activation and desirable lateral abdominal muscular corseting (slide and thicking) occurs during Low Pressure Fitness postural exercises and breathing. Since Low Pressure Fitness is a progressive exercise program, qualified instruction, technique driven progression and understanding pelvic floor health are needed to optimize patient outcomes.
Chon SC, Chang KY, You JS. Effect of the abdominal draw-in manoeuvre in combination with ankle dorsiflexion in strengthening the transverse abdominal muscle in healthy young adults: a preliminary, randomised, controlled study. Physiotherapy 96: 130-6, 2017.
Gildea JE, Hides JA, Hodges PW. Morphology of the abdominal muscles in ballet dancers with and without low back pain: a magnetic resonance imaging study. J Sci Med Sport. 17(5): 452-6, 2014.
Khorasani B, Arab AM, Sedighi Gilani MA, Samadi V, Assadi H. Transabdominal ultrasound measurement of pelvic floor muscle mobility in men with and without chronic prostatitis/chronic pelvic pain syndrome. Urology, 80: 673-7, 2012.
McMeeken JM, Beith ID, Newham DJ, Milligan P, Critchley DJ. The relationship between EMG and change in thickness of transversus abdominis. Clin Biomech 19: 337–342, 2004.
Hides JA, Richardson CA, Jull GA. Use of real-time ultrasound imaging for feedback in rehabilitation. Man Ther. 3:125-131,1998.
Navarro B, Torres M, Arranz B, Sanchez O. Muscle response during a hypopressive exercise after pelvic floor physiotherapy: Assessment with transabdominal ultrasound. Fisioterapia 39: 187-94, 2017.
Rial T, Pinsach P. Practical Manual Low Pressure Fitness Level 1. International Hypopressive & Physical Therapy Institute, Vigo, 2017.
Unsgaard-Tøndel M, Lund Nilsen TI, Magnussen J, Vasseljen O. Is activation of transversus abdominis and obliquus internus abdominis associated with long-term changes in chronic low back pain? A prospective study with 1-year follow-up. Br J Sports Med, 46(10): 729-34, 2012.
Van Delft K, Thakar R, Sultan AH. Pelvic floor muscle contractility: digital assessment vs transperineal ultrasound. Ultrasound Obstet Gynecol, 45: 217-22, 2015. Volløyhaug I, Mørkved S, Salvesen Ø, Salvesen KÅ. Assessment of pelvic floor muscle contraction with palpation, perineometry and transperineal ultrasound: a cross-sectional study. Ultrasound Obstet Gynecol 47: 768-73, 2016.
Several weeks ago, I evaluated a patient who was referred to me from a fellow physical therapist. The patient was suffering from sacroiliac joint and low back pain. The patient is a 34-year-old nulliparous woman who is physically fit and participates in several outdoor activities. The therapist had fully evaluated the patient and did not find any articular issues within her spine or pelvis. What she did find was weakness in her local stabilizing muscles and tightness in her global stabilizing muscles. The therapist has an ample amount of clinical experience at treating low back and pelvic pain issues. She is adept at using different verbal cues, positions, and tactile cueing in order to help encourage proper activation of the local core muscles. However, the therapist knew the patient was not getting her local core muscles to fire properly. She didn’t know what else to do with this patient in order to get her to properly activate these muscles. She had tried numerous positions, verbal and tactile cueing without success.
Do you ever have patients where you feel stuck, who are not progressing as you would like them to in treatment? We all do! It is frustrating, isn’t it? The physical therapist called me and asked me to evaluate the patient using real-time ultrasound imaging. The therapist said “If the patient can just see what she is doing, she will then be able to learn how to work the muscles correctly.” She referred the patient to me so I could use ultrasound imaging within the treatment to better assess her activation strategies and use the imaging for biofeedback for with the patient. The patient was amazed with the ability to see what the different layers of muscles were doing. We found she was contracting her TA but only on her left side, and her deep multifidus was not firing at all. Using the ultrasound images, the patient was able to learn the proper way to activate her muscles. She is now working on a strengthening program for her local core muscles including her TA, pelvic floor, and multifidus. Within two treatments, the patient was able to fire her muscles in a different way and reports her back has felt better than it has in years!
The Pathway Ultrasound Imaging System, available from The Prometheus Group, is a portable ultrasound solution for pelvic rehab
I cannot emphasize enough how using ultrasound might change your practice! It not only can help you when you are stuck with a patient’s progress, but it can attract more patients to your practice. There are a lot of visual learners out there and access to visual images in therapy can influence progress and the results that are achieved. You not only can use the ultrasound to retrain the local core muscles for back and pelvic instability patients, but you can use it for incontinence patients, prolapse patients, and post prostatectomy patients as well. You can strengthen the pelvic floor without having to disrobe the patient each visit. How many men and women would appreciate that?
If you are interested in learning more about how you can use ultrasound in your practice, join me in August in New Jersey, or in November in California for Rehabilitative Ultrasound Imaging - Women's Health and Orthopedic Topics! See you there!
A couple of years ago, I wrote a blog about an interesting article by Hides and Stanton that related size and strength of the multifidus to the risk for lower extremity injury in Australian professional football players.
Now some of the same researchers are looking above. A prospective cohort study has recently been published that examined factors and their effects on concussions. Physical measurements of risk factors were taken in pre-season among Australian football players. These measurements included balance, vestibular function, and spinal control. To measure these outcomes the following tests were included: for balance the amount of sway across six test conditions were performed; vestibular function was tested with assessments of ocular-motor and vestibular ocular reflex; and for spinal control cervical joint position error, multifidus size, and contraction ability was tested. The objective measure was concussion injury obtained during the season diagnosed by the medical staff.
The findings were so interesting! Age, height, weight, and number of years playing football were not associated with concussion. Cross-sectional area of the multifidus at L5 was 10% smaller in players who went on to sustain a concussion compared to players that did not receive a concussion. There were no significant differences observed between the players that received concussion and those who did not with respect to the other physical measures that were obtained.
With all the recent evidence about the harmful effects of concussions amongst our athletes, I find this information amazing and am excited to see where the researchers take this in the future. The next question for the physical therapist is how do we train the multifidus? The multifidus can be difficult to retrain in some individuals. It is a hard muscle for some patients to learn to recruit. Biofeedback using ultrasound imaging can make this daunting task easier for many patients. With the cost of ultrasound units coming down, it is also a very reasonable tool for clinics to look at investing in.
Join me to learn more about the multifidus and how to use ultrasound imaging in the retraining process. Future course offerings include August in New Jersey, and November in San Diego. I look forward to seeing you there!
Hides, Stanton. Can motor control training lower the risk of injury for professional football players? Med Sci Sports Exerc. 2014; 46(4): 762-8.
Leung, Hides, Franettovich Smith, et al. Spinal control is related to concussion in professional footballers. Brit J of Sports Med. 2017; 51(11).
In some families, puberty is not only a time to have to deal with all the physical, hormonal, and emotional changes that are occurring, but it is a time to have to worry about and check for spinal abnormalities that can run in families. Adolescent idiopathic scoliosis is an abnormal curvature of the spine that appears in late childhood or adolescence. The spine will rotate, and a curvature will develop in an “S” shape or “C” shape. Scoliosis is the most common spinal disorder in children and adolescents. It is present in 2 to 4 percent of children between the ages of 10 and 16 years of age. There is a genetic link to developing scoliosis and scientists are working to identify the gene that leads to adolescent idiopathic scoliosis. Adolescent girls are more likely to develop more severe scoliosis. The ratio of girls to boys with small curves of 10 degrees or less is equal, however the ratio of girls to boys with a curvature of 30 degrees or greater is 10:1. Additionally, the risk of curve progression is 10 times higher in girls compared to boys. Scoliosis can cause quite a bit of pain, morbidity, and if severe enough can warrant spinal surgery.
A recent article in Pediatric Physical Therapy by Zapata et al. assessed if there were asymmetries in paraspinal muscle thickness in adolescents with and without adolescent idiopathic scoliosis. They utilized ultrasound imaging to compare muscle thickness of the deep paraspinals at T8 and the multifidus at L1 and L4. They found significant differences in muscle thickness on the concave side compared to the convex side at T8 and L1 in subjects with scoliosis. They also found significantly greater muscle thickness on the concave side at T8, L1, and L4 in patients with adolescent idiopathic scoliosis compared to controls. This is very interesting to me, and exciting to think about the possibilities of how we therapists might can use this information! My first question is, is the difference in muscle thickness a cause or result of the curvature of the spine? My next question is if we trained the multifidus on the convex side, the side that is thinner, would it make a difference in supporting the spine and therefore help prevent some of the curvature? Would strengthening the multifidus in a very segmental manner comparing right versus left and targeting segments and sides that are weaker than others help prevent rotation and curvature in individuals who have a familial predisposition to developing idiopathic scoliosis? I hope so! I hope this group continues to study scoliosis and provides some evidence-based treatment that can help decrease the severity of curvature.
Assessing the multifidus thickness and strength, and differentiating it from the paraspinal muscles can be tricky. The best way to do this is the same way the authors of this article did, using ultrasound imaging. Ultrasound imaging gives unparalleled information on muscle shape, size, and activation of the muscle. Learning to use ultrasound imaging will change your practice! You will see dramatic differences in how you treat patients as well as the results you get when training the local core musculature. It also may open doors to treating different patient types than you are treating now, like adolescents with scoliosis. Join me in Spokane, WA on October 20-22 to further discuss how ultrasound can change your practice and perhaps help you reach out to a new population that you may not be treating now!
Miller NH. Cause and natural history of adolescent idiopathic scoliosis. Orthop Clin North Am. 1999;30:343–52.
Roach JW. Adolescent idiopathic scoliosis. Orthop Clin North Am. 1999;30:353–65.
Zapata KA, Wang-Price SS, Sucato DJ, Dempsey-Robertson M. Ultrasonographic measurements of parspinal muscle thickness in adolescent idiopathic scoliosis: a comparison and reliability study. Pediatr Phys Ther. 2015; 27(2): 119-25.
Have you ever tried to teach a patient how to isolate their transversus abdominis (TA) contraction or a pelvic floor muscle (PFM) contraction and the patient had difficulty or you weren’t sure how well they were isolating it? Did you ever wish you had the ability to use real-time ultrasound (US) to confirm which abdominal layers they were isolating or use it for visual feedback to assist in your patient’s learning? Could it be helpful to be able to use real-time US to identify if they were isolating the pelvic floor muscles and give your patient visual feedback? Of course!
Real- time US has been used as an assessment and teaching tool to directly visualize abdominal and PFMs. PFM function can be assessed by observing movement at the bladder base and bladder neck. Various studies have used US on women with and without urinary incontinence (UI). These studies usually use transabdominal (TAUS) and transperineal (TPUS) ultrasound to measure if PFM isometrics or exercises are performed correctly or incorrectly, or how the muscles are functioning.
A 2015 study in the International Urogynecology Journal utilized TAUS to identify the ability to perform a correct elevating PFM contraction and assess bladder base movement during an abdominal curl up exercise. Abdominal curl ups are cited to increase intra-abdominal pressure. Activities that increase intra-abdominal pressure have been cited to provoke stress urinary incontinence (SUI). Abdominal curl ups are often completed in group exercise classes and have been found to provoke SUI in up to 16% of women.
Use of PFM exercises and of “the knack” (performing an isometric pelvic contraction before an exertional activity where intra-abdominal pressure increases, such as before lifting or coughing) has been shown to help manage stress urinary incontinence.
The theory is that elevation of the PFMs during activities that increase intraabdominal pressure (like a curl up) assist in urethral closure and counter act the downward movement, therefore stabilizing the urethra and bladder neck. When using TAUS, while performing a correct PFM contraction, one might expect to see an elevating PFM contraction. In the study, TAUS was used on 90 women participating in a variety of group exercise classes. The participants completed a survey and then three attempts of an abdominal curl up exercise in hooklying. During the curl ups, bladder base displacement was measured to determine correct or incorrect activation patterns. It was found that 25% of the women were unable to demonstrate an elevating PFM contraction, and all women displayed bladder base depression on the abdominal curl exercise. It was also found that parous women displayed more bladder base depression than nulliparous women, and overall 60% of the participants reported SUI. Lastly, this study found there was no association between SUI and the inability to perform an elevating PFM contraction or the amount of bladder base depression.
What interesting information. Using real time US in the clinic could help us identify if our patients were completing “the knack” correctly with specific activities. This study is a great example of how we can use real time US to help collect evidence to provide us with more information that can help us answer our own questions, patient questions, and improve our instructional methods to patients when teaching core or PFM exercises.
1) Barton, A., Serrao, C., Thompson, J., & Briffa, K. (2015). Transabdominal ultrasound to assess pelvic floor muscle performance during abdominal curl in exercising women. International urogynecology journal, 26(12), 1789-1795.
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.
One of the dilemmas for many clinicians new to pelvic rehab is trying to figure out which equipment to purchase, and how to convince their employer (or themselves) to purchase the equipment. A common question in relation to equipment for pelvic rehabilitation is “what do I really need?” In a perfect world, and based on both existing and emerging research as well as clinical practice recommendations, we would all have access to pressure biofeedback and real-time ultrasound to help us document and train our patients in best strategies. The truth, however, lies in the fact that when those devices are not available, clinical practice can gain meaningful information from our best tools: our eyes and our hands. Certainly when completing research about pelvic floor generated pressures we might choose pressure biofeedback, and when looking for muscle activation patterns, needle EMG is the right choice, but no one should deny patients the opportunity to learn how to increase or decrease muscle activity, focus on movement retraining, and learn strategies to decrease improve quality of life and function because the latest technology is unavailable.
Recent research published in the Brazilian Journal of Physical Therapy helps affirm the value of vaginal palpation in an article that assessed the relationship between vaginal palpation, vaginal squeeze pressure, electromyography and ultrasound. Eighty women between the ages of 18 and 35 years old, who had never given birth, and who had no known pelvic floor dysfunction were given a thorough evaluation using a multitude of evaluative methods. These methods included vaginal digital palpation (using Modified Oxford scale), vaginal squeeze pressure, electromyographic activity, diameter of the bulbocavernosus muscles as well as bladder neck movement using transperineal ultrasound. The muscles were assessed in a supine, hooklying position. A strong and positive correlation was found between pelvic floor muscle function and pelvic floor muscle contraction pressure. A less strong correlation was found between pelvic muscle function and pressure and electromyography and ultrasound.
Vaginal pelvic muscle assessment via palpation has been shown to be more accurate when assessed by more experienced therapists, and use of multiple methods may be most valuable in gaining the most accurate data. In addition to validating the usefulness of pelvic muscle palpation as an evaluative tool, the authors point out that transperineal ultrasound may also be the most appropriate tool for pediatric patients or patients who are otherwise not appropriate for internal pelvic muscle assessment.
Pereira, V. S., Hirakawa, H. S., Oliveira, A. B., & Driusso, P. (2014). Relationship among vaginal palpation, vaginal squeeze pressure, electromyographic and ultrasonographic variables of female pelvic floor muscles. Brazilian journal of physical therapy, 18(5), 428-434.