Canada
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PFPS Cont. You want details?

The muscles of the hip provide not only local stability, but also play an important role in spinal and lower extremity functional alignment. (1-4) While weakness in some hip muscles (hip extensors and knee extensors) is well tolerated, weakness or imbalance in others can have a profound effect on gait and biomechanical function throughout the lower half of the body. (5) Weakness of the hip abductors, particularly those that assist with external rotation, has the most significant impact on hip and lower extremity stability. (5,6)

The gluteus medius is the principal hip abductor. When the hip is flexed, the muscle also assists the six deep hip external rotators (piriformis, gemelli, obturators, and quadratus femoris). The gluteus medius originates on the ilium just inferior to the iliac crest and inserts on the lateral and superior aspects of the greater trochanter. While the principal declared action of the gluteus medius is hip abduction, clinicians will appreciate its more valuable contribution as a dynamic stabilizer of the hip and pelvis- particularly during single leg stance activities like walking, running, and squatting. The gluteus medius contributes approximately 70% of the abduction force required to maintain pelvic leveling during single leg stance. The remainder comes predominantly from 2 muscles that insert onto the iliotibial band: the tensor fascia lata and upper gluteus maximus. Hip abductor strength is the single greatest contributor to lower extremity frontal plain alignment during activity. (6)

Incompetent hip abductors and/or external rotators allows for excessive adduction and internal rotation of the thigh during single leg stance activities. This leads to a cascade of biomechanical problems, including pelvic drop, excessive hip adduction, excessive femoral internal rotation, valgus knee stress, and internal tibial rotation. (1,7-12)
References
1. Szu-Ping Lee, Powers C. Description of a Weight-Bearing Method to Assess Hip Abductor and External Rotator Muscle Performance. JOSPT. Volume 43, Issue 6
2. Crossley KM, Zhang WJ, Schache AG, Bryant A, Cowan SM. Performance on the single-leg squat task indicates hip abductor muscle function. Am J Sports Med. 2011;39:866-873.
3. Presswood L, Cronin J, Keogh JWL, Whatman C. Gluteus medius: applied anatomy, dysfunction, assessment, and progressive strengthening. Strength Cond J. 2008;30:41-53.
4. Sled EA, Khoja L, Deluzio KJ, Olney SJ, Culham EG. Effect of a home program of hip abductor ex- ercises on knee joint loading, strength, function, and pain in people with knee osteoarthritis: a clinical trial. Phys Ther. 2010;90:895-904.
5. van der Krogt MM, Delp SL, Schwartz MH How robust is human gait to muscle weakness? Gait Posture. 2012 Feb 29.
6. Laurie Stickler, Margaret Finley, Heather Gulgin Relationship between hip and core strength and frontal plane alignment during a single leg squat Physical Therapy in Sport Available online 2 June 2014
7. Ireland ML, Willson JD, Ballantyne BT, Davis
IM. Hip strength in females with and without patellofemoral pain. J Orthop Sports Phys Ther. 2003;33:671-676.
8. Noehren B, Davis I, Hamill J. ASB clinical biome- chanics award winner 2006: prospective study of the biomechanical factors associated with iliotib- ial band syndrome. Clin Biomech (Bristol, Avon). 2007;22:951-956.
9. Powers CM. The influence of abnormal hip me- chanics on knee injury: a biomechanical perspec- tive. J Orthop Sports Phys Ther. 2010;40:42-51.
10. Powers CM. The influence of altered lower- extremity kinematics on patellofemoral joint dysfunction: a theoretical perspective. J Orthop Sports Phys Ther. 2003;33:639-646.
11. Sigward SM, Powers CM. Loading characteristics of females exhibiting excessive valgus moments during cutting. Clin Biomech (Bristol, Avon). 2007;22:827-833
12. Souza RB, Powers CM. Differences in hip kine- matics, muscle strength, and muscle activation between subjects with and without patellofemo- ral pain. J Orthop Sports Phys Ther. 2009;39:12- 19.
Exercise Of The Month: T-Spine Rotation
Lumbar Disc Herniation
Great article – thanks to Dr. C. Liebenson for the share.
From the Journal Pain Physician: Incidence of Spontaneous Resorption of
Lumbar Disc Herniation: A Meta-Analysis.
Due to the natural course of lumbar disc herniations (LDH) patients should consider conservative treatment before surgery.
“There is a general consensus among contemporary orthopedists
that, for most patients with LDH, an initial
trial of conservative treatment is preferable to surgical
intervention.”
Source: Zhong, M., et al. (2017). Incidence of Spontaneous Resorption of Lumbar Disc Herniation: A Meta-Analysis. Pain Physician, 20, E45-E52

Exercise and Low Back Pain

City Planning Could Reduce Deadly Diseases.
Using computer models, researchers studied several factors that could affect a city’s quality of life, such as how far people must travel to shop; availability and safety of bike paths; parking costs; and access to public transportation. The researchers estimate that by reducing car use by 10% and reducing the distance to public transportation by 30%, cities could expect the rates of heart disease to drop 15% and type 2 diabetes to drop by 11%.
The Lancet, September 2016

Chronic Neck Pain and Anxiety-Depression.
Chronic neck pain often results in a psychological impact that can affect daily life. A new study involving 80 patients with chronic neck pain investigated the prevalence of anxiety and depression in patients with neck pain as well as associated risk factors and found that 68.4 % suffered from anxiety and 55.7% patients were depressed. Furthermore, disability and cervicobrachial neuralgia (neck pain radiating into the arm) associated with chronic neck pain predicted which patients had at higher risk of psychological distress.
The Pan-African Medical Journal, May 2016

Kids Who Garden Eat Healthier Later in Life.

Letting kids help in the garden may promote lifelong healthy eating habits. Researchers surveyed over 1,300 college students and found that students who gardened as a child and continue to do so ate 2.9 cups of fruits and vegetables daily—about a half a cup more than their peers who never gardened.
Lead author Dr. Anne Mathews adds, “We found that if your parents gardened but you did not, just watching them did not make a difference in how much fruits and vegetables you eat in college. Hands-on experience seems to matter.” The authors suggest that schools offer gardening lessons to expose young children to the activity, which may encourage students to maintain healthy eating habits later in life.
Journal of the Academy of Nutrition and Dietetics, September 2016
Canada’s Pain Crisis
In a nation of only 36 million people, over 5 million people turned to opioid use for their pain despite the availability of better options. Opioids should never be the first step in pain management; preventing overuse takes education of both the public who are using and the professionals prescribing these drugs.
At Aberdeen Chiropractic we are proud to be part of the solution to Canada’s opioid crisis by providing safe, effective care for back pain, neck pain and headaches. Our goal is to assess, correct and prevent your pain with a variety of interventions including Chiropractic, Acupuncture, Laser, Exercise Rehabilitation and Trigger Point Therapy.


