Exam 2 Coccyx Flashcards Preview

Spinal Anatomy Summer 2015 > Exam 2 Coccyx > Flashcards

Flashcards in Exam 2 Coccyx Deck (16)
1

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

4 segments

2

When is ossification of the coccyx completed

About age 30

3

What is the direction of fusion of coccygeal segments

From caudal to cranial the last segments to fuse together are co1 and co2

4

What is the direction of the coccygeal curve

Posterior kyphotic

5

What is the major motion and range of motion for coccyx

Flexion extension 5 to 20°

6

How many coccygeal nerves are present in the fetus

Typically five pairs of coccygeal nerves are present

7

How many coccygeal nerves are present in the adult

Typically only one pair of coccygeal nerves remain in the adult

8

What forms the coccygeal nerve plexus

S4 S5 and CO1 nerves

9

What is the ganglion Impar

A midline sympathetic ganglion

10

What innervates the coccygeal glomus or coccygeal body

Both sympathetic and parasympathetic fibers are identified

11

What muscles attach to the coccyx

Isiococcygeus and levator ani

12

What joint classifications are present for coccyx

Cartilaginous amphiarthrosis symphysis and fibrous amphiarthrosis syndesmosis

13

What ligaments of the vertebral column will be attached to coccyx

Anterior sacral coccygeal ligament
superficial posterior Sacrococcygeal ligament
deep posterior Sacrococcygeal ligament
posterior Sacrococcygeal ligament
intracornual ligament
anococcygeal ligament
sacrospinalis ligament
sacrotuberous ligament
short posterior sacroiliac ligaments
long posterior sacroiliac ligaments
intervertebral disc

14

What is the homolog for the posterior longitudinal ligament at co1

Deep posterior Sacrococcygeal ligament

15

What is the homolog for the ligamentum flavum at co1

Superficial posterior sacrococcygeal ligament

16

What is the number of coccygeal somites

10

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