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Flashcards in Final 1 Deck (15)
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1
Q

What is the incidence of lumbar ribs in the population?

A

over 7% of the population demonstrates lumbar ribs

2
Q

What is characteristic of lumbarization of S1?

A

the failure of synostosis between S1 and S2, squaring of the vertebral body of S1 and flaring of the sacral ala

3
Q

What is the incidence of sacralization of L5 in the population?

A

41% to 85%

4
Q

Which segment demonstrates the greatest morphological variation along the spine?

A

L5

5
Q

What is the incidence of variation within the sacrococcygeal region in the population?

A

up to 14%

6
Q

The trapezius is innervated by what nerve?

A

the spinal accessory nerve

7
Q

What forms the spinal accessory nerve innervating the trapezius?

A

C1-C5 cord levels contribute to the spinal root of the spinal accessory nerve

8
Q

Which of the muscles of the true back is innervated by the thoracodorsal nerve?

A

latissimus dorsi

9
Q

What forms the thoracodorsal nerve innervating the latissimus dorsi?

A

ventral rami from C6-C8

10
Q

Which of the muscles of the true back are innervated by the dorsal scapular nerve?

A

levator scapulae, rhomboid major, rhomboid minor

11
Q

What forms the dorsal scapular nerve?

A

the ventral ramus of C5

12
Q

What muscles lie just beneath the trapezius in the neck?

A

splenius capitis and splenius cervicis

13
Q

What does the word “splenius” mean?

A

it is the Greek word for bandage

14
Q

What is the innervation of the splenius capitis?

A

dorsal rami of middle cervical spinal nerves (C3-C5 cord levels)

15
Q

What is the innervation of the spenius cervicis?

A

dorsal rami of lower cervical spinal nerves (C5-C7 cord levels)