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Flashcards in X. Myology of the Back Deck (267)
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1

What muscles are associated with the five muscle layers of the true back?

layer one consists of the trapezius and latissimus dorsi
layer two consists of the rhomboid major, rhomboid minor, and levator scapulae
layer three consists of the serratus posterior superior and serratus posterior inferior
layer four consists of the erector spinae
layer five consists of the transversospinalis

2

Which of the muscles attaching to spinous processes represent layer one of the true back?

trapezius, latissimus dorsi

3

Which of the muscles attaching to spinous processes represent layer two of the true back?

rhomboid major, rhomboid minor

4

Which muscles attaching to transverse processes represent layer two of the true back?

levator scapulae

5

Which of the muscles attaching to the scapula represent layer one of the true back?

trapezius

6

Which of the muscles attaching to the scapula represent layer two of the true back?

levator scapulae, rhomboid major, rhomboid minor

7

Which of the muscles attaching to the humerus represent layer one of the true back?

latissimus dorsi

8

Which muscles attaching to the lateral mass of C1 represent layer two of the true back?

levator scapulae

9

Which of the muscles in layer one of the true back acts to extend and laterally flex the head and neck and bilaterally acts to extend the neck?

trapezius

10

Which of the muscles in layer two of the true back acts to laterally flex and rotate the neck and bilaterally acts to extend the neck?

levator scapulae

11

Which of the muscles in layer one of the true back acts solely on the humerus?

latissimus dorsi

12

Which of the muscles in layer two of the true back acts solely on the scapula?

rhomboid major, rhomboid minor

13

Which of the muscles of the true back is innervated by the spinal accessory nerve?

trapezius

14

The trapezius is innervated by what nerve?

the spinal accessory nerve

15

What forms the spinal accessory nerve innervating the trapezius?

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

16

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

latissimus dorsi

17

The latissimus dorsi is innervated by what nerve?

the thoracodorsal nerve

18

What forms the thoracodorsal nerve innervating the latissimus dorsi?

ventral rami from C6-C8

19

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

levator scapulae, rhomboid major, rhomboid minor

20

What forms the dorsal scapular nerve?

the ventral ramus of C5

21

The levator scapulae is innervated by what nerves?

the dorsal scapular nerve (ventral ramus of C5) and branches from C3, C4, ventral rami

22

The rhomboid major is innervated by what nerves?

the dorsal scapular nerve (ventral ramus of C5) and branches from C4 ventral ramus

23

The rhomboid minor is innervated by what nerves?

the dorsal scapular nerve (ventral ramus of C5) and branches from C4 ventral ramus

24

What muscles lie just beneath the trapezius in the neck?

splenius capitis and splenius cervicis

25

What does the word "splenius" mean?

it is the Greek word for bandage

26

What part of the vertebra forms the osseous origin for the splenius muscles?

the spinous process

27

Splenius capitis will attach to what locations on the skull?

mastoid process of temporal bone, superior nuchal line of the occipital bone

28

Contraction of splenius capitis will result in what movements?

lateral flexion of head, rotation of face to the side; bilaterally they extend the head

29

What is the innervation of the splenius capitis?

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

30

Splenius cervicis will attach to what locations on the spine?

lateral mass of C1 and posterior tubercle of transverse process on C1-C4