VI: Sacrum

Question 1

From the anterior view, the intervertebral discs of the sacrum will be replaces by what feature?

Answer 1

transverse ridges

Question 2

What part of the sacral ala continues along the ventral surface of sacrum to about S4?

Answer 2

the costal element

Question 3

What forms the median sacral crest?

Answer 3

fused spinous processes and their spinous tubercles

Question 4

An imaginary line drawn from the superior articular process of S1 to the sacral cornu will form what feature?

Answer 4

intermediate sacral crest

Question 5

What features may be identified along the intermediate sacral crest?

Answer 5

the mammillary process of S1 and the sacral cornu of S5

Question 6

What does the sacral cornu represent?

Answer 6

the inferior articular process and facet of S5

Question 7

What is the name of the inferior opening of the sacral spinal canal?

Answer 7

the sacral hiatus

Question 8

What features may be identified along the lateral sacral crest?

Answer 8

S1 transverse tubercle, sacral tuberosity of S2, transverse tubercles from S1 to S5

Question 9

What is the name of the joint formed by the sacral tuberosity?

Answer 9

the accessory sacro-iliac joint

Question 10

What muscle is said to attach to the doral surface of sacrum?

Answer 10

iliacus

Question 11

What feature is identified on the lateral surface of S1-S3?

Answer 11

auricular surface

Question 12

What feature does the anterior surface of the superior epiphyseal rim of S1 form?

Answer 12

the sacral promontory

Question 13

The continuation of the anterior longitudinal ligament below S3 forms what ligament?

Answer 13

the anterior sacrococcygeal ligament

Question 14

The continuation of the posterior longitudinal ligament below S3 forms what ligament?

Answer 14

the deep posterior sacrococcygeal ligament

Question 15

What ligament is attach to the sacral hiatus?

Answer 15

the superficial posterior sacrococcygeal lig.

Question 16

What is the homolog for the posterior longitudinal lig. at S5?

Answer 16

deep posterior sacrococcygeal lig.

Question 17

What is the homolog for the anterior longitudinal lig. at S5?

Answer 17

anterior sacrococcygeal lig.

Question 18

What is the homolog for the ligamentum flavum at S5?

Answer 18

superficial posterior sacrococcygeal lig.

Question 19

What forms the inferior boundary for the spinal canal?

Answer 19

the union of the superficial posterior and deep posterior sacrococcygeal lig.

Question 20

What ligament is formed by the union of the superficial sacrococcygeal and the deep posterior sacrococcygeal ligaments at Co1?

Answer 20

the posterior sacrococcygeal ligament

Question 21

What ligament is a homolog of the intertransverse lig. of S5?

Answer 21

lateral sacrococcygeal lig.

Question 22

What ligament divides the sciatic foramen into the greater and lesser sciatic foramina?

Answer 22

sacrospinous lig.

Question 23

Which lig. has a broad attachment along the lateral margin of sacrum and coccyx and then attaches to the ischial tuberosity?

Answer 23

sacrotuberous lig.

Question 24

Which lig. represents a thickening of the fibrous capsule of the sacro-iliac joint?

Answer 24

anterior sacro-iliac lig.

Question 25

Which ligament is the strongest of the sacro-iliac lig. and is penetrated by doral rami of the sacral spinal nerves?

Answer 25

interosseous sacro-iliac lig.

Question 26

Which lig. will attach the intermediate sacral crest of S1, lateral sacral crest of S2 to the posterior superior iliac spine?

Answer 26

short posterior sacro-iliac lig.

Question 27

Which lig. attaches the lateral sacral crest of S3 and S4 to the posterior suyperior iliac spine?

Answer 27

long posterior sacro-iliac lig.

Question 28

What is the homolog for the inferior articular process and facet at S5?

Answer 28

sacral cornu

Question 29

What is the homolog for the superior articular process and facet at Co1?

Answer 29

coccygeal cornu

Question 30

What is the homolog for the capsular lig. at S5?

Answer 30

intercornual lig.