Erector Spinae (Sacrospinalis) Flashcards Preview

Spinal Anatomy I - Exam 3 > Erector Spinae (Sacrospinalis) > Flashcards

Flashcards in Erector Spinae (Sacrospinalis) Deck (63):
1

Which muscles represent the 4th layer of the true back?

erector spinae or sacrospinalis muscles

2

Which muscles are identified as erector spinae or sacrospinalis muscles?

- iliocostalis
- longissimus
- spinalis

3

What muscles are classically identified as iliocostalis muscles?

- iliocostalis lumborum
- iliocostalis thoracis
- iliocostalis cervicis

4

What osseous parts of the vertebral column serve as an origin to the iliocostalis lumborum?

- spinous processes of T11-T12, L1-L5
- median sacral crest
- lateral sacral crest

5

What is the insertion for the iliocostalis lumborum?

costal angles of the lower 6-9 ribs (ribs 6-12 or 3-12)

6

Contraction of the iliocostalis lumborum will result in what movements?

- extension, lateral flexion, and rotation of lumbar spine
- lateral pelvic movement

7

What is the innervation of the iliocostalis lumborum?

dorsal rami of lower thoracic and all lumbar spinal nerves

8

What muscles are identified as subdivisions within the iliocostalis lumborum?

- iliocostalis lumborum pars lumborum
- iliocostalis lumborum pars thoracis

9

What osseous parts of the vertebral column serve as an origin to the iliocostalis lumborum pars lumborum?

spinous processes of L1-L5

10

What is the insertion for the iliocostalis lumborum pars lumborum?

iliac crest of the innominate bone

11

What osseous parts of the vertebral column serve as an origin to the iliocostalis lumborum pars thoracis?

- posterior superior iliac spine (PSIS)
- iliac crest of the innominate bone

12

What is the insertion for the iliocostalis lumborum pars thoracis?

costal angles of lower 8-9 ribs (rib 3 or 4 to rib 12)

13

Which subdivision of the iliocostalis muscle appears to have a reversal of origin-insertion?

iliocostalis lumborum pars lumborum

14

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

none

15

What is the origin for the iliocostalis thoracis?

costal angles of the lower 6-7 ribs (rib 5 or 6 to rib 12)

16

What is the insertion for the iliocostalis thoracis?

- costal angles of the upper 6-7 ribs
- transverse process of C7

17

What osseous part of the vertebral column serves as insertion for the iliocostalis thoracis?

transverse process of C7

18

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

iliocostalis thoracis

19

Contraction of iliocostalis will result in what movements?

extension and lateral flexion of the thoracic spine

20

What is the innervation of the iliocostalis thoracis?

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

21

What osseous parts of the vertebral column serve as an origin to the iliocostalis cervicis?

none

22

What is the origin for the iliocostalis cervicis?

costal angles of the upper 3-6 ribs (ribs 1-3 or 6)

23

What is the insertion for the iliocostalis cervicis?

posterior tubercle of transverse process of C3 or C4-C6

24

Contraction of iliocostalis cervicis will result in what movements?

extension, lateral flexion, and rotation of the lower cervical spine

25

What is the innervation of the iliocostalis cervicis?

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

26

What muscles are classically identified as longissimus muscles?

- longissimus thoracis
- longissimus cervicis
- longissimus capitis

27

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

- accessory process and transverse processes of L1-L5
- spinous processes of L3-L5
- median sacral crest S1-S3

28

What non-vertebral column site serves as an origin to the longissimus thoracis?

posterior superior iliac spine (PSIS) of the innominate bone

29

What is the insertion for the longissimus thoracis?

- transverse tubercle of all thoracic segments
- between tubercle and costal angle of the lower 9-10 ribs (rib 2 or 3 to rib 12)

30

Which erector spinae muscle is attached to the accessory process?

longissimus thoracis

31

Contraction of the longissimus thoracis will result in what movements of the vertebral column?

- lateral flexion of the thoracic spine (lumbar spine inadvertently)
- bilaterally acts to extend thoracic and lumbar spine
- holds thoracic and lumbar spine erect
- increases the lumbar lordotic curve
- lateral pelvic movement

32

What is the innervation of longissimus thoracis?

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

33

What muscles are identified as subdivisions within the longissimus thoracis muscle?

- longissimus thoracis pars lumborum
- longissimus thoracis pars thoracis

34

What osseous parts of the vertebral column serve as an origin to the longissimus thoracis pars lumborum?

accessory process and medial part of transverse process of L1-L5

35

What is the insertion for the longissimus thoracis pars lumborum?

posterior superior iliac spine (PSIS) of the innominate bone

36

Contraction of longissimus thoracis pars lumborum will result in what movements?

- lateral flexion of lumbar spine
- bilaterally extend lumbar spine
- increase lumbar lordotic curve

37

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

- spinous processes of L3-L5
- median sacral crest S1-S3

38

What non-vertebral column common site serves as an origin to the longissimus thoracis pars thoracis?

posterior superior iliac spine (PSIS) of the innominate bone

39

What is the insertion for the longissimus thoracis pars thoracis?

- transverse process of all thoracics
- between tubercle and costal angle of all ribs

40

Contraction of longissimus thoracis pars thoracis will result in what movements?

- lateral flexion of thoracic spine (lumbar spine inadvertently)
- bilaterally extend thoracic spine (lumbar spine inadvertently)

41

Which subdivision of the longissimus muscle appears to have a reversal of origin-insertion?

longissimus thoracis pars lumborum

42

What osseous parts of the vertebral column serve as an origin to the longissimus cervicis?

transverse tubercles of T1-T5 or T6

43

What osseous parts of the vertebral column serve as an insertion for the longissimus cervicis?

- posterior tubercle of transverse processes from C2-C6 or C7
- articular processes from C2-C6 or C7

44

Contraction of longissimus cervicis will result in what movements?

- lateral flexion of the neck
- bilaterally act to extend neck

45

What is the innervation of longissimus cervicis?

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

46

What osseous parts of the vertebral column serve as an origin to the longissimus capitis?

- transverse tubercle of T1-T5
- articular processes of C4-C7

47

What is the insertion for longissimus capitis?

mastoid process of temporal bone

48

Contraction of longissimus capitis will result in what movements?

- lateral flexion and rotation of head
- bilaterally act to extend head

49

What is the innervation of longissimus capitis?

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

50

Which erector spinae muscles attach to cervical articular processes?

- longissimus cervicis
- longissimus capitis

51

What muscles are classically identified as spinalis muscles?

- spinalis thoracis
- spinalis cervicis
- spinalis capitis

52

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

spinous processes of T11-L2

53

What is the insertion for spinalis thoracis?

spinous process of T1-T4 or as low as T8

54

Contraction of spinalis thoracis will result in what movements?

extension of the thoracic spine

55

What is the innervation of spinalis thoracis?

dorsal rami of all thoracic and upper lumbar nerves

56

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

spinous process of C7 and T1-T6

57

What osseous parts of the vertebral column serve as an insertion for the spinalis thoracis?

spinous processes from C2-C4

58

Contraction of spinalis cervicis will result in what movements?

- lateral flexion and rotation of the cervical spine
- bilaterally act to extend neck

59

What is the innervation of spinalis cervicis?

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

60

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

spinous process of C7 and T1-T6 or T7

61

What is the insertion for the spinalis capitis?

below the superior nuchal line of the occipital bone

62

Contraction of spinalis capitis will result in what movements?

- lateral flexion and rotation of the head
- bilaterally act to extend head

63

What is the innervation of spinalis capitis?

dorsal rami of lower cervical and upper thoracic spinal nerves

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