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SIJ Lecture
Lecture 5
128
Medical
Graduate
10/07/2015

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Term
Clinical examinations must take into account what (5) structures?
Definition
lumbar spine, sacroiliac joint, sacrococcygeal joint, pubic symphysis, hip
Term
where do the ilium, ischium, and pubic bone fuse to form each innominate
Definition
acetabulum
Term
where do each of the innominates articulate with each other?
Definition
pubic symphisis
Term
why is the pubic symphysis classified as a symphysis?
Definition
no synoival tissue or fluid, contains a fibrocartiagnious disc
Term
The bone surfaces of the pubic symphysis are covered with what type of cartilage?
Definition
hylaline
Term
what is the role of the sacrum
Definition
provide stability to the area and transmits the weight of the body from the mobile vertebral column to the pelvic region
Term
the SIJ is considered what type of articulation?
Definition
synovial
Term
how many fused vertebra make up the sacrum
Definition
5
Term
how many vertebra make up the coccyx?
Definition
4 coccygeal vertebra
Term
How many FUSED vertebra are in the coccyx?
Definition
3
Term
Convex/Concave relationships: the sacrum takes what shape?
Definition
concave
Term
the sacrum has what type of cartilage on it?
Definition
hyaline cartilage
Term
the sacrum has what type of cartilage on it?
Definition
hyaline cartilage
Term
convex/concave: what shape does the ilium take?
Definition
convex
Term
type of cartilage on the ilium
Definition
fibrocartilage
Term
what type of articulation is the ilium?
Definition
synovial articulation or diarthroidal
Term
SIJ is thought to recieve innervations ranging from what?
Definition
L3-S2 ventral or dorsal rami
Term
What produces a very diffuse patttern of pain referral from the SIJ?
Definition
joint's highly variable and complex innervation
Term
7 ligaments of the SIJ
Definition
Anterior SIJ, Iliolumbar, Sacrospinous, ANterior Longitudinal, interosseous, sacrotuberous, long/short posterior SIJ
Term
LIgament which is an anterior-inferior thickening of the fibrous capsule
Definition
anterior SIJ
Term
Relatively weak and thin SIJ ligament compared to the rest of the sacroiliac ligaments
Definition
anterior SIJ (ASL)
Term
where is the anterior SIJ ligament located
Definition
extends between teh anterior and inferior borders of the iliac auricular surface and the anterior border of the sacral auricular surface
Term
Short ligament deepd to tohe dorsal sacroiliac ligament
Definition
interosseous
Term
ligament which forms the major connection between the sacrum and the innominate, filling the irregular space posterior-superior to the jt between the lateral sacral crest and the iliac tuberosity
Definition
interosseous ligament
Term
ligament comprised of 3 large fibrous bands broadly attached by its base to the posterior inferior iliac spine, lateral sacrum, and partly blended with the dorsal sacroiliac ligament
Definition
sacrotuberous ligament
Term
2 roles of the sacrotuberous ligament
Definition
stabilizes against nutation (forward rotation) of the sacrum, counteracts against the dorsal and cranial migration of the sacral apex during weight bearing
Term
Role of the sacrospinous ligament
Definition
counteracts against nutation of the sacrum
Term
where does the sacrospinous extends from/to (3)
Definition
from ischial spine, to lateral marigns of the sacrum and coccyx and laterally to the spine of the ischium
Term
the dorsal sacroiliac ligament (long ligament) connects what structures together (3)
Definition
PSIS and small part of the iliac crest with the lateral crest of the third and 4th segement of the sacrum
Term
What motion will slacken the dorsal sacroiliac ligament?
Definition
sacral nutation (anterior motion)
Term
What motion of will tauten the dorsal sacroiliac ligament
Definition
counternutation (posterior motion)
Term
How many mm attach directly to the sacrum or innominate?
Definition
35
Term
primary function of the muscles that attach directly to the sacrum and/or innominate?
Definition
stabilize that sacroiliac jt rather than to move it
Term
6 mm of teh SIJ from anterior aspect
Definition
iliacus, psoas major, pifiriformis, thoracolumbar fascia, coccygeus, hip musculature
Term
6 mm of the sij from a posterior aspect
Definition
multifidus, quadratus lumborum, erector spinae, latissimus, gluteus maximus, gluteus minimus
Term
Primary function of teh piriformis
Definition
produce external rotation and abduction of the femur
Term
Function of the piriformis if the hip joint is flexed beyond 90
Definition
internal rotator and abductor of the hip
Term
dysfunction caused by piriformis muscle
Definition
restricting sacroiliac jt motion
Term
pelvic floor muscles refers to what muscle group name (1)
Definition
levator ani
Term
the levator ani is composed of what mm
Definition
pubococcygeus, puborectalis, iliococcygeus
Term
the levator ani muscles join what mm to complete the pelvic floor
Definition
coccygeus muscles
Term
role of the pelvic floor muscles (5)
Definition
increase intra-abdominal pressure, provide rectal support during defecation, inhibit bladder activity, help to support the pelvic organs, assist in lumbopelvic stability
Term
which ligament has fibers that blend with the hamstring tendons
Definition
sacrotuberous
Term
how many axis of motion have been described for the SIJ
Definition
12 different
Term
14% of the population has no rotation of the SIJ, only this motion
Definition
linear glide
Term
5 axis of motions of the SIJ describe in lecture
Definition
superior transverse, middle transverse, inferior transverse, right and left olbique axes
Term
sij axis: superior transverse axis runs through what?
Definition
second sacral segment
Term
sij axis: superior transverse axis aka
Definition
respiratory axis
Term
sij axis: superior transverse axis is the respiratory axis for what motions?
Definition
flexion and extension
Term
sij axis: superior transverse: what happens during inhalation to the sacrum
Definition
counternutates
Term
sij axis: superior transverse axis: what happens to the sacrum during exhalation
Definition
nutation occurs
Term
sij axis: where does the middle transverse axis run through
Definition
second sacral body
Term
sij axis: what is the principal axis of normal sacroiliac function (nutation) or extension (counternutation)
Definition
middle transverse axis
Term
describe nutation
Definition
sacrum tilts anterior and ilium tilts posterior
Term
what motion of the sacrum increases the outlet for childbirth
Definition
nutation
Term
described counternutation
Definition
sacrum tilts posterior and ilium anterior decreasing the outlet
Term
sij axis: where does the inferior transverse axis run
Definition
through the inferior pole of the sacral articulations
Term
sij axis: principal axis of normal iliosacral motion
Definition
inferior transverse axis
Term
sij axis: which axis of the sij is involved in anterior and posterior rotation of teh innominates
Definition
inferior transverse axis
Term
describe anterior rotation of the ilia
Definition
ASIS rotates anterior/inferior, hip extends, lordosis increases
Term
describe posterior rotation of the ilia
Definition
PSIS moves posterior/inferior, hip flexes, lordosis decreases
Term
sij axis: where do the right and left oblique axes run from
Definition
superior articular surface of the sacrum obliquely to the contralateral inferior lateral angle
Term
the pelvic area must function to absorb what while still permitting motion to occur
Definition
lower extremity rotation
Term
biomechanics of the SIJ: osteopathic model: how does the sacrum rotate?
Definition
around two oblique axes
Term
biomechanics of the SIJ: osteopathic model: how are the innominates/ilia capable of rotating
Definition
anteriorly and posteriorly
Term
biomechanics of the SIJ: osteopathic model: distinction between impairments
Definition
sacroiliac vs iliosacral
Term
biomechanics of the SIJ: form and force closure model: authors behind the model (2)
Definition
Snijders and Vleeming
Term
biomechanics of the SIJ: form and force closure model: kinetics within the lumbar/pelvic/hip regions by these concepts
Definition
extrinsic and intrinsic stability of the pelvic girdle and the self locking mechanism
Term
biomechanics of the SIJ: form and force closure model: form refers to what
Definition
shape of the bone
Term
biomechanics of the SIJ: form and force closure model: force refers to what
Definition
muscles around the joint to create stability
Term
examination of the SIJ involves what
Definition
pain provocation/stress (symptom based) tests
biomechanical/dynamic palpation (motion-based) tests that include static palpation (positional tests)
Term
hx that indicates SIJ dysfunction (3)
Definition
hx of sharp pain awakening the pt from sleep upon turning in bed
pain with walking, ascending or descending stairs, standing from a sittin gposition, or with hopping or standing on the involved leg
positive straight leg raise at, or near, the end of range (occasionally early in the range when hyperacute) pain and sometimes limitation on extension and ipsilateral sidebending of the trunk
Term
pain referall patterns for SIJ: descriptors
Definition
unilateral and dull in character
Term
pain referral patterns for SIJ: specific locations (5)
Definition

PSIS

low back

buttock

lateral thigh

groin

Term
pain referral patterns for SIJ: can be occassionaly distal to what
Definition
distal knee to posterior or lateral calf into foot and toes
Term
MOI for SIJ injury (6)
Definition
1 falling on one buttock
2 lifting with torsion stresses
3 MVA
4 repeated torsional activities (golf, bowling, skating, kicking)
5 pregnancy
6 sex
Term
Exam of the SIJ should always rule out this source for symptoms
Definition
visceral
Term
specific visceral systems to rule out when examing the SIJ (4)
Definition
gastrointestinal, reproductive/genitourinary, vascular, neurlogical
Term
important note about palpation of bony landmarks of the SIJ
Definition
altered positional relatioship within the pelvic girdle should only be considered positive if a mobility restriction of the SIJ and/or pubic symphysis is also found
Term
weight bearing and non weight bearing kinetic tests of the sij are designed to assess what
Definition
osteokinematics occuring at the SIJ during pt generated movements
Term
weight bearing and on weight bearing kinetic tests asses what
Definition
mobility of the innominate and the ability of the sacrum nutate
Term
example of a weight bearing and non weight bearing kinetic test
Definition
supine to long sit
Term
SIJ stress/provocation tests: are believed to be senstive for what
Definition
severe arthritis or ventral ligament tears
Term
SIJ stress/provocation tests: are designed to do what
Definition
assess the integrity of the jt and the surrounding ligaments
Term
SIJ stress/provocation tests: examples (5)
Definition
compression, distraction, sacral thrust, anterior/posterior rotation (gaenslen's test), posterior shear/thigh thrust test
Term
SIJ stress/provocation tests: of the 5 tests how many need to be positive to have a high sensitivity and specificity
Definition
3 out of 5
Term
Proposed SIJ Exam Schema: 1 of 4
Definition
comprehensive Hx: note pain patterns and MOI suggestive of SIJ dysfunction
Term
Proposed SIJ Exam Schema: 2 of 4
Definition
note asymmetries during structural exam
Term
Proposed SIJ Exam Schema: 3 of 4
Definition
rule out lumbar involvement through AROM, repeated movements, PROM/SSMT/PAIVM and neuro exam
Term
Proposed SIJ Exam Schema: 4 of 4
Definition
confirm SIJ involvement through static/dyanmic testing and stress/provocation testing
Term
Possible SIJ dx: involving the ilia/innominiates (2)
Definition
anterior/posterior rotation, ilial upslips/downslips
Term
Possible SIJ dx: involving the sacrum
Definition
sacral torsions (forwards and backwards R on L, L on R, R on R, L on L)
Term
Possible SIJ dx: general conditions (2)
Definition
hypermobility, trauma/inflammation
Term
Possible SIJ dx: dysfunctions (2)
Definition
symphysis pubis dysfunction, coccydynia
Term
Possible SIJ dx: PPPP
Definition
peripeartum pelvic pain syndrome
Term
Right posterior rotation of ilium: what happens to the right acetabulum
Definition
moves cranially
Term
Right posterior rotation of ilium: what happens to the right leg
Definition
functionally shorter
Term
Right posterior rotation of ilium: what happens to the right sacral base
Definition
tilts down
Term
Right posterior rotation of ilium: what happens to the lumbar spine
Definition
sidebends right and rotates left
Term
Right posterior rotation of ilium: what happens to the structures of teh spine as a result of the lumbar spine sidebending right and rotating left
Definition
closing of the IV foramen, compression of the disc, stretching of the iliolumbar ligaments
Term
Right posterior rotation of ilium: what happens to the sacral ligaments
Definition
sacrospinous and sacrotuberous ligaments stretch
Term
Right posterior rotation of ilium: what happens to the mechanics of the hip as a result of lateral deviation of the acetabulum
Definition
changes in antetorsion angle resulting in external rotaiton of hip affecting gait, overwork of internal rotators
Term
Right posterior rotation of ilium: what happens to the coccyx
Definition
deviates left
Term
Right posterior rotation of ilium: what happens to the pubic symphysis
Definition
displacement
Term
Exam findings: Anterior torsion (L on L): sacral sulcus
Definition
deep on R
prone on elbows symmetric
Term
Exam findings: Anterior torsion (L on L): ILA
Definition
prominient on L
Term
Exam findings: Anterior torsion (L on L): lumbar ext
Definition
increased on normal
Term
Exam findings: Anterior torsion (L on L): lordosis
Definition
increased or normal
Term
Exam findings: Anterior torsion (L on L): PA pressure to sacrum/L5
Definition
possible
Term
Exam findings: Anterior torsion (L on L): L5
Definition
SB R and Rot L
Term
Exam findings: posterior torsion (R on L): sacral sulcus
Definition
prominent on R
Prone on elbows = asymmetric
Term
Exam findings: posterior torsion (R on L): ILA
Definition
deep on L
Term
Exam findings: posterior torsion (R on L): lumbar ext
Definition
decreased
Term
Exam findings: posterior torsion (R on L): lordosis
Definition
flat
Term
Exam findings: posterior torsion (R on L): PA pressure to sacrum/L5
Definition
no or limited
Term
Exam findings: posterior torsion (R on L): L5
Definition
SB L and Rot L
Term
rupture of pubic symphysis aka
Definition
diastasis
Term
pubic symphysis dysfunction MOI
Definition
pregnency and or strucutral malalignment of pelvis
Term
examination findins for pubic symphysis dysfunction (7)
Definition
painful palpation of anteiror pubic symphysis
clicking
positive provocaiton testing (compression, distraction, FABER)
Decreased hip rom
Limited tolerance to single limb stance
Term
how many women experience low back pain during pregnancy
Definition
50%
Term
what percnetage of women would describe their low bakc pain as severe during pregnancy
Definition
33%
Term
PPPP is associate dwith what (3)
Definition
pelvic and sacral positional faults
decreased joint stability
decreased motor control
Term
how is PPPP managed
Definition
manual therapy
ther ex targeting lumbopelvic and hip stabilizers
bracing if possible
Term
Coccydynia MOI
Definition
childbirth, trauma (fall)
Term
coccydynia is a reuslt of what
Definition
coccyx becoming fixated in an anterior/posterior position and/or developing pain and inflammation of supporting ligaments and structures
Term
s/s of coccydynia
Definition
increased pain with sitting, weight bearing on area
Term
coccydynia intervention
Definition
rest, anti-inflammatic measures, thrust and non thrust manipulation
Term
4 pieces of advice for pt with SIJ pathology
Definition
attempt symmetry with hypermobility
sit with hips abducted to 45 and bakc straight
avoid asymmetry during sex
bracing
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