Exam 2 Coccyx Flashcards Preview

Spinal Anatomy Summer 2015 > Exam 2 Coccyx > Flashcards

Flashcards in Exam 2 Coccyx Deck (16)
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1
Q

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

A

4 segments

2
Q

When is ossification of the coccyx completed

A

About age 30

3
Q

What is the direction of fusion of coccygeal segments

A

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

4
Q

What is the direction of the coccygeal curve

A

Posterior kyphotic

5
Q

What is the major motion and range of motion for coccyx

A

Flexion extension 5 to 20°

6
Q

How many coccygeal nerves are present in the fetus

A

Typically five pairs of coccygeal nerves are present

7
Q

How many coccygeal nerves are present in the adult

A

Typically only one pair of coccygeal nerves remain in the adult

8
Q

What forms the coccygeal nerve plexus

A

S4 S5 and CO1 nerves

9
Q

What is the ganglion Impar

A

A midline sympathetic ganglion

10
Q

What innervates the coccygeal glomus or coccygeal body

A

Both sympathetic and parasympathetic fibers are identified

11
Q

What muscles attach to the coccyx

A

Isiococcygeus and levator ani

12
Q

What joint classifications are present for coccyx

A

Cartilaginous amphiarthrosis symphysis and fibrous amphiarthrosis syndesmosis

13
Q

What ligaments of the vertebral column will be attached to coccyx

A
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
Q

What is the homolog for the posterior longitudinal ligament at co1

A

Deep posterior Sacrococcygeal ligament

15
Q

What is the homolog for the ligamentum flavum at co1

A

Superficial posterior sacrococcygeal ligament

16
Q

What is the number of coccygeal somites

A

10

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