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50 Cards in this Set

  • Front
  • Back
articulations between R and L os coxae and the sacrum
SI joints
compresses the sacrum laterally
each ilium
orientation of sacrum
oblique with convex-concave relationship between ilium and sacrum
The sacrum is wider _______ at the top, and _______ at the bottom.
posteriorly
anteriorly
*this shape restricts nutation
What creates STABILITY by limiting SI motion?
SI ligaments
proper name for interosseous ligament (strongest one)
syndesmosis
What covers ilial surfaces in the SI joints?
fibrocartilage
Each SI has a joint capsule with a synovial-type fluid contained and is therefore considered to be a _________ joint.
synovial
Opposes vertical translation and SI joint distraction - disrupted when pubic symphysis is off by even 25mm.
Anterior SI ligament

*Vertical restriction
Restricts lateral flexion of lumbar base relative to ilium, and restricts translation out of pelvic girdle as result of normal lordosis.
Iliolumbar Ligament

*Lateral and lordosis limiter
This SI ligament is a thin extension of the synovial capsule and restricts vertical translation of sacrum.
Anterior SI ligament
This ligament comes from L4/5 TP's and blends with the anterior SI ligament; it restricts lateral and lordotic translation.
Iliolumbar ligament
Attaches the PSIS to the sacrum! Ergo, it is so stiff it frequently is mistaken for bony prominence during palpation.
Posterior SI ligament
Continuous with sacrotuberous ligament, then hamstring fascia, all the way from the PSIS!
Posterior SI ligament
Limits joint separation, vertically and anteroposterior translations and limits EXCESSIVE COUNTERNUTATION
Posterior SI Ligament
Anterior ligament stops ________ translation. Iliolumbar stops ______ + _______ translation. Posterior SI stops joint separation, vertical/anteroposterior and excessive __________.
Anterior = vertical + joint dis.
Iliolumbar = lateral + lordotic
Posterior = counternutation
Has a Lateral, Medial and Superior band...very large LEVER ARM that restricts nutation (like iliolumbar).
Sacrotuberous ligament
The anterior SI ligament is an extension of the anterior joint capsule; what is the sacrotuberous ligament?
an extension of the posteroinferor joint capsule of the SI
Which band of the Sacrotuberous ligament lever arm stretches from PSIS to coccyx?
Superior
*interdigitates with iliolumbar and restricts nutation
Thickest and strongest ligament of SI
Interosseous
Limits vertical and anteroposterior translation, and is the strongest SI ligament
Interosseous

*same actions as posterior SI ligament
Extension of anteroinferior joint capsule that attaches sacrum to coccyx and ischial spine. LARGE LEVER ARM restricting nutation.
Sacrospinous ligament

*same actions as Sacrotuberous ligament
Sacrospinous is in the front, Sacrotuberous is in the back. They both?
Long Lever arms that restrict NUTATION
Gluteus Maximus attaches to which SI ligament?
Sacrotuberous (the one in the back that is the long lever restricting nutation)
How does gluteus maxiumus influence sacral motion?
it is attached to sacrotuberous ligament, which restricts nutation. It may influence the stability of the joint.
The piriformis is attached to the same ligament as gluteus maximus - ?
sacrotuberous ligament
Which muscles traction the ilia from the sacrum, although not directly attached to the SI?
Gluteus medius and minimus
We know the origin of biceps femoris is the ischial tuberosity. What then is the ligament to which it is attached?
Sacrotuberous so it stabilizes nutation of the sacrum
sacrospinous in the front, sacrotuberous in the back
they both have long lever arms that restrict nutation
Which muscle flexes the hip and is attached to Ventral sacroiliac, iliolumbar and lumbosacral ligaments?
Iliopsoas
Iliacus stabilizes pelvis to hip but PSOAS itself resists the high __________ forces between the lumbar vertebrae
compression
What is not under dispute is the SIJ and its ligaments are extensively ________.
innervated

(L2-S4)
functions of SIJ
1. transmission/dissapation of truncal loads to lower ex and vice versa (buffer)
2. limits X-axis rotation
3. Helps parturition (pregn)
What may preferentially strain and injure the weaker anterior joint capsule of the SIJ?
Torsion and Axial compression
(SI joints can take medially directed force 6x greater)
Which aspect of thoracolumbar fasica cover the QL
deepest
Which aspect of thoracolumbar fascia attaches to TP's and intertransverse ligaments from rib 12- iliac crest?
middle
Layer of thoracolumbar fascia that attaches to most of the SI ligaments, core stability and breathing muscles and lats?
Superficial layer
Most important layer of thoracolumbar fascia, due to ligamentous attachment, ergo SI stability?
Superficial
muscles that contract superficial thoracolumbar fascia
lats
glute max
erectors
muscle attached to deep layer of thoracolumbar fascia
biceps femoris
What muscle pulls on both the ipsi and contra SI's when it contracts, preventing counternutation at both joints
Latissimus dorsi via pulling on the thoracolumbar fascia
Has there ever been a non-invasive test for diagnosing SIJ (dysfunction)?
No
Is the SIJ a significant source of pain in patients with chronic low back pain?
yes

studies done via needle anesthetics
SIJ pain is similar to what pain?
lumbar disc herniation
Single distinguishing characteristic of SIJ dysfunction from lumbar zygapophyseal/disc pain?
groin pain present with SJI

*below the knee radiation was equal
The SIJ presentation of
Low Back
Groin
Thigh pain is most common in?
young & middle aged women
Most common method to diagnose SIJ dysfunction?
static palpation
What is the most valid, not the most common, method of diagnosing SIJ dysfun.
SIJ blocks
conclusion of chiro diagnostics for SIJ
not reproducible nor is detection of lumbo-pelvic lesion because no valid tests established
Presence of the manipulative lesion of SIJ remains ____________
hypothetical