Lecture 4A: SIJ Anatomy

Question 1

intersection b/t spine and LE

Answer 1

SIJ

Question 2

SI joint can produce pain as well as ____ pain

Answer 2

refer

note: contributes to dx of non-specific LBP in 15-30% of individuals

Question 3

which side is sacrum concave? convex?

Answer 3

concave anterior
convex posterior

Question 4

name mm that attach at the sacrum

Answer 4

ES, multifidi, glute max, TL fascia

Question 5

innominates are connected anteriorly by ____
connected posteriorly by ____

Answer 5

pubic synphysis
sacrum

Question 6

anterior sacroiliac ligament limits

Answer 6

ALL motions
(bind sacrum and ilia)

SI JOINT PATHOLOGY: PAIN GENERATORS

Question 7

MOST IMPORTANT LIGAMNET OF SIJ and what does it limit

Answer 7

interosseous SI Lig

limit: anterior and inferior movement of the sacrum

Question 8

posterior sacroiliac ligament
“long ligaments”

Answer 8

limit anterior iliac rotation **(sacral counternutation) **

SIJ PATHOLOGY PAIN GENERATOR

Question 9

Sacrotuberous ligament AND sacrospinous ligament limit

Answer 9

posterior iliac rotation (sacral nutation)

Question 10

a common source of groin pain particularly in athletes

Answer 10

pubic symphysis

Question 11

T/F pubic symphysis is unstable

Answer 11

F (must be in tact and can’t be asymmetrical)

Question 12

pelvic floor muscles assist in ____stability

Answer 12

Lumbopelvic stability

Question 13

only 2 mm can direcly produce SIJ motion

Answer 13

piriformis
pubococcygeal

Question 14

posterior oblique system

Answer 14

Lats, TL Fascia, contralateral glute max

Question 15

anterior oblique system

Answer 15

EO and IO,
Contralateral hip adductor and anterior abd fascia

Question 16

lateral muscle system

Answer 16

glute med and min
contralateral hip add

Question 17

inner mm system that stabilize the SIJ

Answer 17

multifidi
TA
PFM
Diaphragm

Question 18

nerve supply:
anterior SIJ
posterior SIJ

Answer 18

a: posterior rami of L2-S2
p: posterior rami of L3-S3

Question 19

sacral nutation (flexion) limited by

Answer 19

SI, Sacrotuberous and Sacrospinous ligaments

Question 20

sacral nutation (FLEXION)
base moves ____
apex moves ____

Answer 20

base moves anterior and inferior

apex moves posterior and superior

Question 21

sacral counternutation motion limited by

Answer 21

SI ligaments

Question 22

sacral counternutation (EXTENSION)
base moves ____

apex moves____

Answer 22

base moves posterior and superior
apex moves inferior and anterior

Question 23

posterior innominate = (sacral nutation or coutnernutation)?

Answer 23

sacrum nutation

Question 24

anterior innominate = (sacrum nutation or counternutation)?

Answer 24

sacrum counternutation

Question 25

increased hip flexion seen in

Answer 25

sacral nutation

Question 26

increased lumbar lordosis seen in

Answer 26

sacral counternutation

Question 27

sacral ____makes the outlet larger

Answer 27

nutation (FLEXION)