Sacro-Iliac Joint Flashcards Preview

Spinal Anatomy I - Exam 3 > Sacro-Iliac Joint > Flashcards

Flashcards in Sacro-Iliac Joint Deck (35):
1

What joint classifications are present at the sacro-iliac joint?

- synovial plane (diarthrosis arthrodia)
- fibrous (amphiarthrosis syndesmosis)

2

What is the name of the articular surface of the sacrum at the sacro-iliac joint?

the auricular surface of the sacrum

3

What is the name of the articular surface of the ilium at the sacro-iliac joint?

the auricular surface of the ilium

4

What is the auricular surface of sacrum composed of?

true articular cartilage, a modification of hyaline cartilage

5

What is the auricular surface of the ilium composed of?

articular cartilage, interspersed with fibrocartilage

6

What is the superficial appearance of the auricular surfaces of the sacro-iliac joint in infancy?

both the sacrum and ilium are smooth surfaced at the sacro-iliac joint

7

What is the superficial appearance of the auricular surfaces of the sacro-iliac joint by age 15?

the sacrum develops a sacral groove while the ilium develops an iliac ridge

8

Which gender is biased with greater unevenness of the auricular surface of the sacro-iliac joint?

males

9

What additional modifications of the auricular surfaces of the sacro-iliac joint may occur?

posterior to the sacral groove and iliac ridge, an iliac tuberosity and sacral fossa appear

10

What forms the accessory sacro-iliac joint?

the sacral tuberosity and the iliac sulcus

11

What pathological or age-related modifications of the sacro-iliac joint may occur?

degenerative arthrosis and ankylosis

12

What does degenerative arthrosis mean?

a condition of degeneration of the joint, sometimes referred to as degenerative joint disease (DJD)

13

What does ankylosis mean?

a condition of fibrous adhesion occurs within the joint

14

What is the age and surface bias associated with degenerative arthrosis of the sacro-iliac joint?

age 40, the iliac auricular surface

15

What is the age and gender bias associated with ankylosis of the sacro-iliac joint?

age 50 and male bias, particularly in African American males

16

What is the function of the sacro-iliac joint?

it transfers weight from the vertebral column onto the pelvic girdle and lower extremity

17

What movements at the sacro-iliac joint are described as forward nodding and backward nodding?

nutation and counternutation, respectively

18

Which part of the sacro-iliac joint is in motion during nutation and counternutation?

the ilium or pelvis in general

19

What are the attachment sites of the capsular lig of the sacro-iliac joint?

at the margins of the auricular surfaces of the sacrum and ilium

20

What is unusual about the capsular lig of the sacro-iliac joint?

it appears to be absent on the posterior margin of the sacro-iliac joint

21

What are the accessory ligs of the sacro-iliac joint?

- anterior sacro-iliac lig
- interosseous sacro-iliac lig
- posterior sacro-iliac lig

22

What joint classification is associated with the accessory ligs of the sacro-iliac joint?

fibrous (amphiarthrosis) syndesmosis

23

What is unusual about the anterior sacro-iliac lig?

it appears to be a condensation or thickening of the fibrous capsule of the sacro-iliac joint

24

What are the attachment sites of the anterior sacro-iliac joint?

at the anterior and inferior margins of the capsular lig

25

At what location is the anterior sacroiliac lig best developed?

along the arcuate line and posterior inferior iliac spine (PSIS) of the ilium

26

What is the age and gender bias associated with ossification of the anterior sacro-iliac lig?

age 40 and male bias

27

Which is the strongest of the sacro-iliac lig?

the interosseous sacro-iliac lig

28

What are the attachment sites of the interosseous sacroiliac lig?

at the sacral tuberosity and the iliac sulcus

29

What is the relationship between the capsular and interosseous sacroiliac lig?

the interosseous sacroiliac lig replaces the capsular lig posteriorly

30

What passes between the layers of the interosseous sacroiiac lig?

dorsal rami from the sacral spinal nerves

31

What are the attachment sites of the posterior sacroiliac lig?

from the intermediate sacral crest and lateral sacral crest to the posterior superior iliac spine (PSIS) and the posterior medial margin of the iliac crest

32

What are the subdivisions of the posterior sacroiliac lig?

the short posterior sacroiliac lig and the long posterior sacroiliac lig

33

What are the attachment sites of the short posterior sacroiliac lig?

from the intermediate sacral crest at S1 and lateral sacral crest at S2 to the posterior superior iliac spine (PSIS) and the posterior medial margin of the iliac crest

34

What are the attachment sites of the long posterior sacroiliac lig?

from the lateral sacral crest at S3 and S4 to the PSIS

35

What lig blends with the lateral border of the long posterior sacroiliac lig?

the sacrotuberous lig

Decks in Spinal Anatomy I - Exam 3 Class (94):