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Spinal Anatomy Test 2 > Day 11 > Flashcards

Flashcards in Day 11 Deck (29):
1

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

five

2

What joint classifications will be observed at the first sacral vertebral body?

cartilaginous (amphiarthrosis) symphysis and fibrous (amphiarthrosis) syndesmosis

3

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

psoas major

4

What is the position of the sacral zygapophysis in children?

the zygapophysis lies in the coronal plane for L5/S1

5

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

backward, upward, medial (BUM); typically concave

6

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

transverse ridges

7

What forms the median sacral crest?

fused spinous processes and their spinous tubercles

8

What forms the intermediate sacral crest?

fused articular processes and their facets

9

What features may be identified along the intermediate sacral crest?

the mammillary process of S1 and the sacral cornu of S5

10

What is the sacral hiatus?

the inferior opening of the sacral spinal canal

11

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

the lateral sacral crest

12

What is the sacral tuberosity?

the enlarged transverse tubercle of S2

13

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

the accessory sacra-iliac joint

14

What feature is associated with the transverse tubercle of S5?

the inferior and lateral (inferolateral) sacral angle

15

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

auricular surface

16

What is the sacral promontory?

the bulging anterior surface of the superior epiphyseal rim of S1

17

How many synovial joints are typically present at sacrum?

four

18

What joint classifications are typically present at sacrum?

fibrous (amphiarthrosis) syndesmosis, cartilagionous (amphiarthrosis) symphysis and synovial plane (diarthrosis arthrodia)

19

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

coccygeal cornu

20

What is the number of coccygeal somites?

ten

21

What is the typical number of segments which unite to form the adult coccyx?

4 segments

22

When is ossification of coccyx completed?

about age 30

23

What is the direction of fusion of coccygeal segments?

from caudal to cranial, the last segments to fuse together are Co1 and Co2

24

What is the direction of the coccygeal curve?

posterior (kyphotic)

25

What is the major motion and range of motion for coccyx?

flexion - extension, 5-20 degrees

26

How many coccygeal nerves are present in the fetus?

typically 5 pairs of coccygeal nerves are present

27

What forms the coccygeal nerve plexus

S4, S5, and Co1 nerves

28

What is the ganglion impair?

a midline sympathetic ganglion

29

What is the coccygeal gloms or coccygeal body?

an enlarged encapsulated arteriovenous anastomosis located near the last segment of coccyx