lec 7 joints & ligaments of pelvis

Question 1

lumbosacral junction is what type of joint

Answer 1

secondary cartilaginous

Question 2

where is lumbosacral junction

Answer 2

b/t L5 and base of sacrum

Question 3

hyperlordosis

Answer 3

increase in sacral inclination and decrease in lumbosacral angle
more exaggerated lumbar curve

Question 4

movement at sagittal plane of lumbosacral joint

Answer 4

flexion and extension

Question 5

movement at coronal plane of lumbosacral joint

Answer 5

some side bending

Question 6

movement at horizontal plane of lumbosacral joint

Answer 6

some rotation

Question 7

what is sacroiliac joint

Answer 7

articulation b/t axial and appendicular skeleton

Question 8

classification of sacroiliac joitn

Answer 8

Plane synovial joint (between auricular surfaces of sacrum and ilium) syndesmosis (between sacral and iliac tuberosities)

Question 9

What are the adaptations of the sacroiliac joint that limit movement, but facilitate weight transfer?

Answer 9

rough interlocking articular surfaces
interosseous ligaments
accessory ligaments

Question 10

what are movements of sacroiliac joint

Answer 10

1-8 degrees

Question 11

ankylosis

Answer 11

fusion

Question 12

What is the function of the ridges and furrows on the auricular surfaces?

Answer 12

They contribute to the stability and strength of the joint

They can be used to determine age

Question 13

what ligament is found at tuberosities of sacrum and ilium

Answer 13

interosseous ligament

Question 14

anteriorly what is sacroiliac fibrous joint comprised of

Answer 14

bands of capsular ligaments (thickenings of fibrous capsule)

Question 15

What is the medial attachment of the ventral sacroiliac ligament?

Answer 15

Base and pelvic surface of sacral segments S1-S3

Question 16

What is the lateral attachment of the ventral sacroiliac ligament?

Answer 16

Medial edge of the iliac fossa (thick @ arcuate line and preauricular sulcus)

Question 17

What is the strongest link between the ilium and sacrum?

Answer 17

The interosseous sacroiliac ligament (syndesmosis/fibrous joint)

Question 18

What is the medial attachment of the sacroiliac ligament?

Answer 18

sacral tuberosity

Question 19

What is the lateral attachment of the sacroiliac ligament?

Answer 19

iliac tuberosity

Question 20

where are extrascapular ligaments

Answer 20

posteriorly

Question 21

Which sacroiliac ligaments are extracapsular?

Answer 21

dorsal sacroiliac ligaments

Question 22

Where does the short dorsal sacroiliac ligament run?

Answer 22

From sacral base to proximal 1/2 of intermediate sacral crest

To the iliac tuberosity

Question 23

where does the long dorsal sacroiliac ligament run

Answer 23

from lateral sacral crest (S3/4) to PSIS

Question 24

what is the iliolumbar ligament

Answer 24

A series of bands from L5 body to t.p. To iliac crest, iliac tuberosity, upper surface of sacral ala & ventral sacroiliac ligament

Question 25

function of iliolumbar ligament

Answer 25

To resist flexion, extension, rotation, and side bending (to stabilize)

Question 26

What are the accessory ligaments of the pelvic region?

Answer 26

Iliolumbar ligament Sacrotuberous ligament Sacrospinous ligament

Question 27

Where does the sacrotuberous ligament run?

Answer 27

From - medial edge of ischial tuberosity | To - PSIS & PIIS, lateral sacral crest, and coccyx

Question 28

What does the sacrospinous ligament run?

Answer 28

From - ischial spine | To - lateral edge of S4 & S5 and coccyx

Question 29

The sacrotuberous ligament is next to what tendon of the lower extremity?

Answer 29

The tendon of the long head of biceps Femoris and semitendinosus

Question 30

What is the function of the sacrotuberous and sacrospinous ligaments?

Answer 30

Resist (limit) upward movement of sacral apex

Question 31

What type of joint is the pubic symphysis?

Answer 31

Secondary cartilaginous type joint Fibrocartilaginous interpubic disc Thin hyaline cartilage on symphyseal surfaces

Question 32

What are the ligaments that attach to the pubic symphysis?

Answer 32

Superior pubic Arcuate pubic And anterior & posterior pubic