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Spinal Anatomy Exam 2 > Sacrum > Flashcards

Flashcards in Sacrum Deck (39):
1

What is the typical number of segments that unite to form the adult sacrum?

5 segments

2

What is the generic size of the first sacral vertebral body from the base view?

transversely broad

3

Which sacral segment is described as wedge-shaped from a lateral view?

the first sacral segment

4

What is the position of the sacral zygapophysis in children?

the zygapophysis lies in the coronal plane

5

What is the position of the sacral zygapophysis in adults?

the zygapophysis lies in the coronal plane for L5/S1

6

What is the orientation of the first sacral superior articular facet?

backward, upward, medial (BUM); typically concave

7

What muscles will attach to the sacral mammillary processes?

multifidis

8

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

transverse ridges

9

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

the costal element

10

What forms the median sacral crest?

fused spinous processes and they spinous tubercles

11

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

intermediate sacral crest

12

What muscles may attach to the medial sacral crest?

latissimus dorsi, iliocostalis lumborum, longissimus thoracis

13

What features may be identified along the intermediate sacral crest?

the mammillary process of S1 and the sacral cornu of S5

14

What is the remnant of the inferior articular process and facet of S5?

the sacral cornu

15

An imaginary line drawn from the transverse process of S1 to the inferior lateral sacral angle will form what feature?

the lateral sacral crest

16

What features may be identified along the lateral sacral crest?

S1 transverse tubercle, sacral tuberosity of S2, transverse tubercles of S3-S5

17

What is the sacral tuberosity?

the enlarged transverse tubercle of S2

18

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

the accessory sacro-iliac joint

19

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

iliacus

20

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

auricular surface

21

What classification of joint is formed by the auricular surface of sacrum?

synovial plane (diarthrosis arthordia)

22

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

the sacral promontory

23

What forms the posterior boundary for the fifth sacral spinal nerve intervertebral foramen?

sacral cornu, coccygeal cornu, superficial posterior sacroscoccygeal ligament and intervertebral disc

24

What forms the anterior boundary for the fifth sacral spinal nerve intervertebral foramen?

vertebral body S5, vertebral body Co1, deep posterior sacrococcygeal ligament and intervertebral disc

25

What is the homolog for the posterior longitudinal ligament at S5?

deep posterior sacrococcygeal ligament

26

What is the homolog for the anterior longitudinal ligament at S5?

anterior sacrococcygeal ligament

27

What is the homolog for the ligamentum flavor at S5?

superfiacial posterior sacrococcygeal ligament

28

What forms the inferior boundary for the spinal canal?

The union of the superficial posterior and deep posterior sacrococcygeal ligaments

29

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

the posterior sacrococcygeal ligament

30

What ligament is a homolog of the inter transverse ligament at S5?

lateral sacrococcygeal ligament

31

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

sacrospinous ligament

32

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

sacrotuberous ligament

33

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

anterior sacro-iliac ligament

34

Which ligament is the strongest of the sacro-iliac ligaments and is penetrated by dorsal rami of the sacral spinal nerves?

interosseous sacro-iliac ligament

35

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

short posterior sacroiliac ligament

36

Which ligament attaches the lateral sacral crest of S3 and S4 to the posterior superior iliac spine?

long posterior sacroiliac ligament

37

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

sacral cornu

38

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

coccygeal cornu

39

What is the homolog for the capsular ligament at S5?

intercornual ligament