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BACK PAIN MANAGEMENT
Quoc To Ai Giang D.C.
Statistics
• 75-85% of Americans will suffer from LBP once in their lifetime
• 90% will improve w/out surgery• 50% of those who have an episode will
have a recurrent episode within 1 year• 5.4 million workers will be disabled for 1 or
more years from LBP
– NeuroSurgery Today March 2006
Sacroiliac Joint
• Lumbo-sacral joint complex functions as a self-compensating mechanism which accommodates, mitigates, balances, stores and redirects forces affecting the pelvis and spine.
• Forces: gravity, weight bearing, inertia, rotation, acc/deceleration, ground reactive forces
Sacroiliac Joint
• SI joint is essential for load transfer between spine and legs
• Slight changes in the mobility or stability can be responsible for variety of clinical conditions
Sacroiliac Joint
• Pathology in this joint has been reported in numerous of inflammatory, metabolic, and infective disorders
• Yet mechanical dysfunctions of this joint remains controversial, largely due to our lack of knowledge about the joint
Sacroiliac Joint
• Composed of 2 innominate bones and a sacrum forming 2 SI joints and pubic symphysis
• Ligaments, joint capsule, muscle, fascia, articular configuration
Sacroiliac Joint
• Sacrum– A tilted wedge or
keystone– The weight of the spine
coupled with gravity forces the sacrum to wedge snugly between the two innominates.
• This phenomenon along with other passive anatomical features that provide stability are called form closure.
Form Closure
•Osteoarticulo-ligamentous component
– “Refers to a stable situation with closely fitting joint surfaces, where no extra forces are needed to maintain the state (stability) of the system”
– Vleeming
• Stabilization of the pelvis via ligamentous structures
Ligamentous Structures
Sacroiliac JointSI Joint Surfaces:• Sacrum: The articular
surface, called auricular, is concave, covered in thick hyaline cartilage and is shaped like a plane propeller - wider P-A in the upper aspect and wider A-P in the lower aspect .
• Ilium: Controversy exists as to if the iliac side is fibrocartilage or hyaline. Either way, its convex surface is irregular (rough).
Shape of the SIJ effectively resists flexion.
Sacroiliac Joint
Ligaments - designed to limit the mobility of the SI joint.
• The ligaments must oppose strong forces for long periods of time.
• Simonian noted the strength of the ligaments by cutting through the pubic symphysis and the iliac wings only flared out slightly.
Sacroiliac Joint• Iliolumbar Ligament: limits
axial rotation and anterior glide of L5 on the sacrum.
• Sacrotuberous Ligament: resists sacral movement into nutation, (tightens the ligament). It also has as an important connection to the long head of the biceps femoris.
• Sacrospinal Ligament: see #2• Dorsal Sacral Iliac Ligament:
this large ligament tightens in counter-nutation. It makes up 2/3 of the posterior SI connections and blends with #2, erector spinae and thoracolumbar fascia.
1
2
4
4
3
Sacroiliac Joint
• Anterior Sacroiliac Ligament: opposes axial translation of the sacrum and separation of the SI joints.
• Interosseous Ligament (not shown): fills in the irregular spaces posterior and superior to the joint; resists joint separation.
5
Sacroiliac Joint - Capsule
• Superior portion is a caudal extension of the iliolumbar ligament
• Anterior portion is dense connective tissue and caudally blends with the sacrospinous ligament
• Posterior portion is made up of multiple interwoven bands (interosseous ligaments)
5
Sacroiliac Joint - Innervation
• Anterior superior joint receives info. from spinal nerves L4 & 5
• Anterior inferior joint supplied by S1 & 2 and other sacral nerves
5
Sacroiliac Joint• Muscles: The major muscles and
fascia that are involved in the SI joint are the gluteus maximus and medius, psoas, piriformis multifidus, latissimus dorsi, abdominal obliques, transversus abdominus, biceps femoris, latissimus dorsi, pelvic floor & diaphragm and thoracolumbar fascia.
• The forces created by the muscles acting on SI joint to provide stability is called Force Closure.
Force Closure
•“Force closure refers to a system whereby additional forces are necessary to maintain the joint in place.”
– J. Snijders
Second Interdisciplinary Word Congress on Low Back Pain – San Diego 1995
Force Closure
• Erector Spinali – Extends spine and
pelvis– Contraction creates
sacral nutation (locking) thus ligaments tighten and SI joint locks
Force Closure
• Multifidi– Tendon pass above
interosseous ligament and inserts into sacrum, iliac crest, and sacrotuberous ligament
– Contraction facilitates nutation
Force Closure
• Gluteus Maximus– Hip extensor– Directly compresses
SI joint due to fiber orientation
– Fibers blend with sacrotuberous ligament and thoracolumbar fascia
Form Closure
• Latissimus Dorsi– Extends, abducts, and
medially rotate humerus– Deep fibers: lower T/S
spinous processes and iliac crest
– Superficial fibers: oblique caudal fibers blend with thoracolumbar fascia and then contralateral gluteal muscles
Force Closure
• Biceps femoris– Long head crosses
over the ischeal tuberosity & blends into sacrotuberous ligament
– Contraction increases sacrotuberous tension
Force Closure
• Piriformis– Externally rotates
femur– Crosses SI joint
perpendicular & compresses the joint
Force Closure
• Psoas
• Quadratus Lumborum
Force Closure
• Adominals The Transverse
Abdominals wrap around the spine and goes all the way to the front and when activated it stabilizes the spine and pelvis
Force Closure
• Thoracolumbar fascia– Clinical of
importance in surgery, it blends with the deep cervical fascia which forms a plane for infection to travel
Force Closure
• Abdominals
• Transverse Abdominals– Deepest of the 3
layers– Perhaps the most
functional for core stabilization, spinal stabilization
Joint Functions
• If joint is compressed this will result in restriction
• If joint is not compressed enough this will result in instability or hypermobility
• If joint does not function in a smooth & efficient manner this can result in abnormal firing patterns
Joint Functions
•The Panjabi Model as modified by Vleeming & Lee
Integration
• Joint function requires normal function of the joint & of the muscles – Form Closure – Force Closure
• Joint restriction can be due to muscular and ligamentous elements
•Local stabilizers vs. Global stabilizers & global maximizers
Inner Core
•Tranversus Abdominus•Lumbar Multifidi •Pelvic Floor •Diaphragm
The Tranversus Abdominus
•Pre-Anticipatory
•Damaged by:– Surgery– Overactive
Rectus– Pendulant
Abdomen – The rest of the
inner unit
Lumbar Multifidi
•Shut off after 3 minutes in slumped posture
•Atrophy occurs in most of modern (sitting) society
•Mass is replaced by fatty infiltration
Pelvic Floor
• Damaged by childbirth – a normal vaginal delivery
• Is affected by the other inner unit muscles not functioning
• Puborectalis – a muscle of the pelvic floor can be overactive as a consequence of rectus over-activity which is itself a product of Tranversus Abdominus weakness
3 Phases to LBP Rehabilitation•Phase I: Acute Phase
– Physiatrist and treatment team focus on making a diagnosis, developing an appropriate treatment plan, and implementing the treatment regimen to reduce the initial low back pain and source of inflammation.
– This may include any/all of the items listed above and/or the utilization of ultrasound, electrical stimulation, or specialized injections.
3 Phases to LBP Rehabilitation• Phase II: Recovery Phase
– Once the initial pain and inflammation are better managed, the rehabilitation team then focuses on helping the patient to restore working function of the body.
– This includes returning the patient to normal daily activities while implementing a specialized exercise program that is designed to help the individual regain flexibility and strength.
3 Phases to LBP Rehabilitation
•Phase III: Maintenance Phase– The goal of this phase of low back pain
rehabilitation is two-fold: •Educating the individual on ways to prevent
further injury and strain to the back
•Helping the individual to maintain an appropriate level of physical fitness to help further increase strength and endurance.
Common Causes
• Disc Lesions with/out Radiculopathy– 98% of Disc lesions occur at L4-5 & L5-S1
• Overuse, strenuous activity, or improper use (i.e., repetitive or heavy lifting, exposure to vibration for prolonged periods of time)
• Trauma/injury/fracture• Degeneration of vertebrae (often caused by
stresses on the muscles and ligaments that support the spine, or the effects of instability.
Common Causes
• Infection
•Abnormal growth (tumor)
•Obesity (often caused by increased weight on the spine and pressure on the discs)
•Poor muscle tone in the back
Common Causes
•Muscle tension or spasm•Sprain or strain•Ligament or muscle tears• Joint problems•Smoking (damage to the
vasculatures of discs)•Disease (i.e., osteoarthritis,
spondylitis, compression fractures)
– a term that encapsulates all the
possible causes of joint changes
Movement Dysfunction
– implies some holding element that restricts movement
- possible candidates : muscle, ligament or capsular change due to some past trauma to the tissue
Joint Fixation or Restriction
a. Capsular & Ligamentous Changes following trauma & the inflammatory cascade Clinical Orthopedics, 1987, Akeson, Amiel, Abel, Garfin & Woo (for an overview see
the Aging Body by Morgenthal & Boughie – Chapter 3 b. Trigger Points / Myofascial Changes
Travell & Simons – Myofascial Pain & Dysfunction – the Trigger Point Manual Volume 1 & 2
c. Muscle Imbalances Janda
d. Alterations in the Arthrokinetic Reflex
Cassidy / Mooney
Movement Dysfunction Causes:
Cassidy / Mooney– Based on Hilton’s law, the nerves that innervate
a joint innervate the muscles around the joint. If there's a problem within the joint the surrounding muscles will be weakened or shut off. This has been proposed as a primary mechanism of dysfunction in all areas of the spine. 1.) SI joint dysfunction and glute inhibition,
(Bernard and Cassidy 91) 2.) Lumbar joint dysfunction and multifidus
inhibition, (Hides 96) 3.) Cervical spine and L. coli (longissimus coli
muscle) inhibition, (Wright, Jull 2001) 4.) Vastus medialis inhibition after knee joint
dysfunction, (Richardson PhD thesis)
Alterations in the Arthrokinetic Reflex
Directional InstabilityNutation vs. Counternutation Dominance
• Sacrotuberus ligament Checks Nutation
• Long & Short Sacroiliac ligaments Checks Counternutation
Nutation
Counternutation
Nutation
Counternutation
Assessments
Functionally putting the puzzle
together: We need to be able to assess the
complaints through functional testing.
Orthopedic (Functional) Exams/Assessments
•Acute Vs. Chronic Determine if the problem is an acute
vs. chronic complaint
Gillet’s TestPerformed knee to chest while standing: Pull knees alternately to chest. The PSIS that moves down the furthest in relation to the opposite one is the unblocked side. The blocked side will come very little or appear to move cephalically. Recruitment is from the bottom up. Hip flexion must be at least 90 degrees.
Gillet’s Test
Piedallu’s Sign:
The movement of the posterior superior iliac spines upon forward flexion. A positive Piedallu’s sign is asymetrical movement.
Gaelen’s Test:
The patient lies on the side with the upper leg (test leg) hyperextended at the hip (1st photo). The patient holds the lower leg flexed against the chest. The examiner stabilizes the pelvis while extending the hip of the uppermost leg. The test can also be performed supine (2nd) but this position may limit the amount of hyperextension. Position patient so the test hip extends beyond the edge pf the table. Then draw up both legs onto the chest then slowly lower the test leg into extension. Pain in the sacroiliac joints indicates a positive test.
Gait Analysis
Gait
How can we incorporate static anatomy into functional anatomy?
Gait – Heel Strike
• Prior to heel strike, heel strike becomes active
• Which increases tension of sacrotuberous ligament
• Thus compresses SI joint
• Forces transmitted across SI joint into spine
Gait – Stance Phase
• Innominates begin anterior rotation – counter-nutation begins– Loose SI joint. locking
• Long Dorsal SI ligament tension increases
• Need to stabilize SI joint– Gluteus maximus activates and replaces
Biceps femoris– Contralateral lats dorsi activates
Gait – Swing Phase
• No weight in SI joint. It is suspended.
• Ligamentous control of SI joint
Gait
• With Each Phase of Gait– Opposite arm and “wringing of spine” (it occurs like taking a rubber band and twisting it, when you let go, it “springs”)– Ligaments, discs, and spinal curves maximize
yielding energy storage
Elastic Energy is released in the next cycle —followed by muscular energy
Treatment
Treatment should be inclusive to include all the tissues that can affect movement. Each treatment should be tailor made to fit the patients dysfunction, manipulation, mobilization, rehabilitation, stretching & diet/nutrition should a part of every doctor’s practice regiment.
Treatments
•Activity modification
•Medication
•Physical rehabilitation and/or therapy
•Occupational therapy
•Weight loss (if overweight)
INTEGRATED METHOD OF TREATMENT
The Integrated Model of JointFunction
Form ClosureForce Closure
Function
Motor ControlEmotionsAwareness
Treatments
•Following a prevention program (as directed by your physician)
•Quit smoking
•Surgery
•Assistive devices (i.e., mechanical back supports)
Why Failures?
ApplicationWith all our knowledge in anatomy we need to learn how to apply it to the patient who is having pain after all the treatments they’ve had.•Extensive connections of
sacrotuberous ligaments– Gluteus Maximus– Piriformis– Bicep Femoris– Multifidi– Thoracolumbar Fascia
Application
• SI joint is located in the middle of considerable force streams– Mechanoreceptors
• Dysfunctional of Form/Force Closure can have significant effects locally at the SI joint and far into the lower/upper limbs or cervical spine.– Loss of bracing– Shifting of loads into the lumbar/sacral area
Applications
•Often these connections are incomplete, unilateral or asymetrical– I.E. - Unilateral shorten biceps
•Could these differences cause symptoms in the patient? The answer is YES!
Applications
•Our goal is to find these differences
•Evaluations of:– Trigger Points– Hyper/Hypotonicity – Myofascial bands– Decrease muscle length– Pain
Applications
•These imbalances will change the function of the SI joints and L/S as a UNIT– FAILED SELF BRACING
“Abnormal movement of the sacrum in the SI joints may lead to abnormal stress loads transmitted into the L/S thus abnormal stress on the intervertebral discs and joints.”
- Vleeming
Failed Self Bracing
• Imbalances– Weak erector spinae leads to insufficient
nutation– Weak gluteus maximus leads to insufficient
SI compression– Weak Lats leads to insufficient SI
compression
•Decreased SI joint. compression & poor nutation leads to dysfunction and pain syndromes
Failed Self Bracing
•Sustained counter-nutation leads to:– Absent SI compression therefore
increasing joint shear forces– Lordosis is lost– Load is transferred to L/S and discs…
increasing shear
Failed Self Bracing
• Irritation of the SI joint inhibits the gluteus maximus• Inhibition = weakness
•Hamstring will attempt to increase hip extension and help increase SI joint compression• shorten stride
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