Pelvic Exam II

Question 1

what are the parts of the pelvis?

Answer 1

Two innominate bones, pubic symphysis, and sacrum.

Question 2

what is the joint of the sacrum and the innominate bones?

Answer 2

the sacroiliac joints

Question 3

what bones fuse to make the innominate?

Answer 3

ilium, ischium and pubis

Question 4

what type of joint is the pubic symphysis?

Answer 4

amphiarthrosis, its slightly movable fibrocartliganeous disk

Question 5

where is the median sacral crest?

Answer 5

the second sacral tubercle.

Question 6

why is are the sacroiliac joints atypical?

Answer 6

because they have irregular joint surfaces for a synovial diarthrotic joint

Question 7

features of sacroiliac joint?

Answer 7

synovial, fibrocartilage, central convex ridge, heavy ligaments on posterior and superior surfaces

Question 8

what is the shape of the SI joint on the sacram?

Answer 8

boot shape with a concave central joint

Question 9

does the SI joint have hyline cartilage?

Answer 9

yes

Question 10

what hold SI joint together?

Answer 10

It has sacroiliac joint at bottom with the interosseous sacroiliac ligament connecting the bones above that

Question 11

What connects L-5 and S1 (Z joint) to the innominate?

Answer 11

Iliolumbar ligament

Question 12

what is the keysone effect?

Answer 12

the sacrum forms an arch suspended by stond sacroiliac ligaments. Resists displacement

Question 13

what part of sacroiliac joint resists inferior displacement?

Answer 13

Inferior displacement is resisted by the sacrums wedge shape

Question 14

Wht part of the sacroiliac joint resists posterior displacement?

Answer 14

Posterior displacement is resisted by sacroiliac ligaments

Question 15

What part of sacroiliac joint resists anterior displacement?

Answer 15

Anterior displacement is resisted by sacroiliac ligaments and the symphysis pubus

Question 16

what part of SI joint has the groove and wedge?

Answer 16

sacrum has a grove and the ilium has the ridge.

Question 17

what parts of SI joint promotes stability, 3 things

Answer 17

wedge shape, interlocking grove and ridge, and s shaped joint surfaces.

Question 18

what is force closure of SI joint?

Answer 18

tension in muscles ligaments and fascia aids in stabilizing the si joints.

Question 19

what pressure does the force closure create?

Answer 19

creates lateral to medial pressure to compress the SI joint

Question 20

what is the force closure muscles called for SI?

Answer 20

the posterior myofascial sling

Question 21

what transmists force between lower extremity and axial skeleton?

Answer 21

the pelvis.

Question 22

does the SI joint/pelvis move?

Answer 22

yes, it slides and pivots to absorb and adapt to forces generated between trunk and lowwer extremities during walking.

Question 23

what does the movement of the pelvis do?

Answer 23

decreases sttress to lumbar spine and opposite si joint.

Question 24

what is nutation?

Answer 24

sacroiliac motion where the sacral base rotates forward on iliam, or the ilium rotates back on sacrum.

Question 25

what is counter nutation?

Answer 25

where sacrum tilts back on illium or the ilium tilts foreward on sacrum

Question 26

nutation creates what movment/rotation?

Answer 26

the anterior sacral tilt /posterior iliac tilt causes increased lumbar lordotic curve

Question 27

counter nutation creates what?

Answer 27

decreases the lumbar lordotic curve when the sacrum tilts posteriorly

Question 28

movements at pubic symphysis?

Answer 28

compression, distraction, rotation in sagital plane with SI, gliding anterior posterior and superior inferior

Question 29

what is the force couple of anterior pelvic tilt?

Answer 29

Hip flexors - iliospoas and rectus femoras pull down on the front, the back extensors- erector spina pull up on the back tilting everything forward.

Question 30

What is the force couple for posterior pelvic tilt?

Answer 30

Hip extensors - glut max and hamstrings pull the the back down, Abdominal muscles- rectus abdominus and obliquus externus pull the front up.