Myology of the Back: All Sections Flashcards Preview

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Flashcards in Myology of the Back: All Sections Deck (56)
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1

The trapezius is innervated by what nerve?

The spinal accessory nerve

2

What forms the spinal accessory nerve innervating the trapezius?

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

3

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

Latissimus dorsi

4

What forms the thoracodorsal nerve innervating the latissimus dorsi?

Ventral rami from C6-C8

5

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

Levator scapulae, rhomboid major, rhomboid minor

6

What forms the dorsal scapular nerve?

The ventral ramus of C5

7

What muscles lie just beneath the trapezius in the neck?

Splenius capitis and splenius cervicis

8

What does the word "splenius" mean?

It is the Greek word for bandage

9

What is the innervation of the splenius capitis?

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

10

What is the innervation of the splenius cervicis?

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

11

Which muscles are identified as erector spinae or sacrospinalis msucles?

Iliocostalis, longissimus, spinalis

12

What is the innervation of the iliocostalis lumborum?

Dorsal rami of lower thoracic and all lumbar spinal nerves

13

Which subdivision of the iliocostalis primarily originates and inserts on ribs?

Iliocostalis thoracics

14

What is the innervation of the iliocostalis thoracis?

Dorsal rami of upper 6 thoracic spinal nerves (T1-T6 cord levels)

15

What is the insertion of the iliocostalis cervicis?

Posterior tubercle of transverse process of C(3) C4-C6

16

What is the innervation of the iliocostalis cervicis?

Dorsal rami of T1, T2 spinal nerves, sometimes C8 spinal nerve (C8, T1, T2 cord levels)

17

Which erector spinae muscle is attached to the accessory process?

Longissimus thoracis

18

What is the innervation of the longissimus thoracis?

Dorsal rami of all thoracic and lumbar spinal nerves (cord levels T1-T12, L1-L5)

19

What is the innervation of the longissimus cervicis?

Dorsal rami of C4-C8 and T1-T2 spinal nerves (C4-C8 and T1-T2 cord levels)

20

What is the innervation of the longissimus capitis?

Dorsal rami of C1-C3 or C4 spinal nerves, (C1-C3 or C4 cord levels)

21

Which erector spinae muscles attach to cervical articular processes?

Longissimus cervicis and longissimus catpitis

22

What osseous parts of the vertebral column serve as an origin to the spinalis thoracis?

Spinous processes of T11 and T12-L1 and L2

23

What is the innervation of the spinalis thoracis?

Dorsal rami of all thoracic and upper lumbar spinal nerves

24

What is the innervation of the spinalis cervicis?

Dorsal rami of all cervical spinal nerves (C1-C8 cord levels)

25

What is the innervation of the spinalis capitis?

Dorsal rami of lower cervical and upper thoracic spinal nerves

26

Which muscles are identified as transversospinalis muscles?

Semispinalis, multifidis, and rotators

27

How many vertebrae can be attached to a single segment by transversospinalis muscles?

As many as nine vertebrae

28

Contraction of semispinalis thoracis will result in what movements?

Extension, lateral flexion, and rotation of upper thoracic and lower cervical spine, bilaterally they act to extend the thoracic spine

29

What is the innervation of the semispinalis thoracis?

Dorsal rami of T1-T6 spinal nerves (cord levels T1-T6)

30

What is the innervation of the semispinalis cervicis?

Dorsal rami of C6-C8 spinal nerves (cord levels C6-C8)

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