Erector Spinae (Sacrospinalis) Flashcards Preview

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

Flashcards in Erector Spinae (Sacrospinalis) Deck (63)
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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

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