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Flashcards in Sacrum Deck (27)
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1
Q

What part of the sacral ala is derived from the true transverse process?

A

the posterior third

2
Q

How many fibrous (amphiarthrosis) syndesmosis joint surfaces are present on the S1 vertebral body?

A

four

3
Q

How many joint surfaces are present on the vertebral body of the first sacral segment?

A

five

4
Q

How many cartilaginous (amphiarthrosis) symphysis joint surfaces are present on the S1 vertebral body?

A

one

5
Q

What muscle(s) may attach to the first sacral vertebral body?

A

psoas major

6
Q

What is the position of the sacral zygapophysis in adults?

A

the zygapophyses lies in the coronal plane for L5/S1

7
Q

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

A

backward, upward, medial (BUM); typically concave

8
Q

What is the name given to the projectio on the first sacral superior articular process?

A

mammillary process

9
Q

What muscles will attach to the sacral mammillary processes?

A

multifidis

10
Q

An imaginary line is drawn along the dorsal midline of sacrum is identified s the ____?

A

median sacral crest

11
Q

What is the name given to the congenital condition in which the fifth lumbar spinous process is elongated, the sacrum exhibits spina bifida, and dorsiflexion produces pain?

A

Knife Clasp Syndrome

12
Q

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

A

intermediate sacral crest

13
Q

What features may be identified along the intermediate sacral crest?

A

the mammillary process of S1 an the sacral cornu of S5

14
Q

What does the sacral cornu represent?

A

the inferior articular process and facet of S5

15
Q

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

A

the sacral hiatus

16
Q

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

A

the lateral sacral crest

17
Q

What is the sacral tuberosity?

A

the enlarged transverse tubercle of S2

18
Q

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

A

the accessory sacro-iliac joint

19
Q

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

A

auricular surface

20
Q

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

A

the sacral promontory

21
Q

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

A

the deep posterior sacrococcygeal ligament

22
Q

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

A

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

23
Q

What part of the sacral ala is derived from the costal element?

A

the anterior two-thirds

24
Q

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

A

sacrospnous ligament

25
Q

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

A

sacrotuberous ligament

26
Q

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

A

interosseous sacro-iliac ligament

27
Q

what is the homolog for the capsular ligament at S5?

A

intercornual ligament