L13: Muscles of the vertebral column and trunk Flashcards Preview

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Flashcards in L13: Muscles of the vertebral column and trunk Deck (44):
1

What part of the body are axial muscles?

- head and neck
- vertebral column
- thorax, abdomen, pelvis

2

what are the different types of muscles of the vertebral column? (positions on body)

- posterior
- anterior
- lateral

3

What position on the body are the suboccipital muscles?

- posterior

4

Bilateral action of the suboccipital muscles?

- extend the head on the upper cervical spine

5

unilateral action of the suboccipital muscles?

- ipsilateral rotation and lateral flexion of the head

6

what nerve innverates the suboccipital muscles?

- suboccipital nerve (C1 dorsal ramus)

7

What position on the body are the segmental muscles?
Are they deep or superficial?

- Posterior: Deep

8

What are the segmented muscles innervated by?

- dorsal rami of spinal nerves

9

What are the segmental muscles?

- interspinales
- intertransversarii

10

Function of segmental muscles?

- proprioceptive/ stabilisation

11

Position of the transversospinales group on the body? Superficial or deep?

- Posterior: Deep

12

What nerve innervates the transversospinales group?

- dorsal rami of spinal nerves

13

what does the transversospinales group consist of?

1. rotatores (thoracic)
2. multifidus (lumbar)
3. semispinalis cervicis & capitis

14

What occurs from bilateral action performed by the transversospinales group?

Extension
Extends vertebral column/ neck

15

What position on the body are the erector spinae group? superficial or deep?

- Posterior: superficial

16

what nerve innervates the erector spinae group?

dorsal rami of spinal nerves

17

what consists of the erector spinae group?

- iliocostalis
- longissimus
- spinales

18

what occurs from bilateral and unilateral action of the erector spinae group perform?

- Bilateral action: extends neck and vertebral column
- Unilateral action: ipsilateral lateral flexion

19

what position on the body is the splenius? superficial or deep?

posterior: superficial

20

what nerve innervates the splenius?

dorsal rami of spinal nerves

21

what consists of the splenius?

- splenius capitis
- splenius cervicis

22

what occurs from bilateral action and unilateral action of the splenius?

- bilateral action: extends head/ neck
- unilateral action: ipsilateral rotation (turns head to same side)

23

What position on the body is the longus capitis?

anterior

24

what nerve innervates the longus capitis, longus cervicis, rectus capitis anterior and rectus capitis lateralis?

ventral rami of spinal nerves

25

unilateral action action of longus capitis?

- head and upper cervical spine flexion
- ipsilateral lateral flexion

26

unilateral action of longus cervicis?

- cervical spine flexion
- ipsilateral lateral flexion

27

what position are the scalenes on the vertebral column?

- lateral

28

what nerve innervates the scalenes?

ventral rami of spinal nerves

29

what do the scalenes consist of?

-anterior scalene
- middle
- posterior

30

what occurs from bilateral and unilateral action of the scalenes?

- bilateral action: cervical spine flexion, elevate ribs
- unilateral action: ipsilateral lateral flexion

31

what nerve innervates the serratus posterior superior and serratus posterior inferior?

- intercostal nerves

32

what completes the thoracic wall?

- 3 layers of intercostals (between ribs)

33

what are the 3 layers of intercostals?

1. external intercostals (inspiration)
2. interal intercostals (expiration)
3. innermost intercostals

34

what innervates the thoracic wall?

intercostal nerves

35

what is the origin and insertion of the levator costarum?

Origin: tips of transverse processes (C7 & T1-T11)

Insertion: rib below

36

what innervates the levator costarum?

dorsal rami of spinal nerves

37

what is the diaphragm?

- main muscle of inspiration

38

what nerve innervates the diaphragm?

- phrenic nerve

39

What types of muscles (position on body) make up the abdominal wall and what nerve innervates them?

- posterior
- lateral
- anterior
Innervation: ventral rami of spinal nerves

40

what are the posterior muscles of the abdominal wall

- quadratus lumborum
- psoas major (appendicular)

41

what are the lateral muscles of the abdominal wall?

1. external oblique abdominal
2. internal oblique abdominal
3. transversus abdominis

42

what position is the rectus abdominus and what is its function?

- anterior
- trunk flexion

43

what are the tendinous intersections of the abdominal wall?

- linea alba

44

what are the muscles of the lateral abdominal wall? (hint: 3)

1. external oblique abdominal
2. internal oblique abdominal
3. transversus abdominis