Intrinsic Back Muscles - Deep

Question 1

What muscle groups are included in the deep layer of intrinsic back?

Answer 1

Transversospinalis group, segmental muscles, suboccipital region

Question 2

What muscles are included in the transversospinalis group?

Answer 2

Semispinalis, multifidus, rotatores longus and brevis

Question 3

What are the segmental muscles?

Answer 3

Levatores costarum, interspinales, intertransversarii

Question 4

What muscles are included in the suboccipital region?

Answer 4

Rectus capitis posterior major and minor
Obliquus capitis inferior and superior

Question 5

transversospinalis

Semispinalis capitis origin

Answer 5

Transverse processes of upper 6-7 thoracic vertebrae

Question 6

transversospinalis

Semispinalis capitis insertion

Answer 6

Occipital bone between superior and inferior nuchal lines

Question 7

transversospinalis

Semispinalis capitis innervation

Answer 7

Medial branches of dorsal rami C1-C6

Question 8

transversospinalis

Semispinalis capitis blood supply

Answer 8

Descending branch of occipital artery, deep branch of costocervical trunk

Question 9

transversospinalis

Semispinalis capitis actions

Answer 9

Bilaterally extends neck
Unilaterally turns face toward opposite side

Question 9

transversospinalis

Semispinalis cervicis origin

Answer 9

Transverse processes of upper 5-6 thoracic vertebrae

Question 9

transversospinalis

Semispinalis cervicis insertion

Answer 9

Spinous processes C2-C5

Question 10

transversospinalis

Semispinalis cervicis innervation

Answer 10

Medial branches of dorsal rami C6-C8

Question 11

transversospinalis

Semispinalis cervicis blood supply

Answer 11

Deep branch of costocervical trunk, posterior intercostal arteries

Question 12

transversospinalis

Semispinalis cervicis actions

Answer 12

Bilaterally extends vertebral column
Unilaterally rotates vertebral column to the opposite side

Question 13

transversospinalis

Semispinalis thoracis origin

Answer 13

Transverse processes of lower 6 thoracic vertebrae

Question 14

transversospinalis

Semispinalis thoracis insertion

Answer 14

Spinous processes of upper thoracic and lower cervical vertebrae

Question 15

transversospinalis

Semispinalis thoracis innervation

Answer 15

Dorsal rami of spinal nerves T1-T6

Question 16

transversospinalis

Semispinalis thoracis blood supply

Answer 16

Posterior intercostal arteries

Question 17

transversospinalis

Semispinalis thoracis actions

Answer 17

Bilaterally extends the vertebral column
Unilaterally rotates vertebral column to one side

Question 18

transversospinalis

Multifidus origins

Answer 18

Posterior surface of sacrum, posterior sacroiliac ligament, mammillary processes of lumbar vertebrae, transverse processes of thoracic vertebrae, articular processes of C4-C7

Question 19

transversospinalis

Multifidus insertion

Answer 19

Spines of vertebrae 2-4 segments superior to origin

Question 20

transversospinalis

Multifidus innervation

Answer 20

Dorsal rami of all spinal nerves

Question 21

transversospinalis

Multifidus blood supply

Answer 21

Posterior intercostal and lumbar arteries, deep cervical branch of costocervical trunk

Question 22

transversospinalis

Multifidus actions

Answer 22

Extension, lateral flexion and rotation of vertebral column
Extension and lateral motions of pelvis

Question 23

# transversospinalis Rotatores origin

Answer 23

Transverse processes of vertebrae

Question 24

# transversospinalis Rotatores insertion

Answer 24

Brevis- lamina of vertebrae immediately superior Longus- lamina of vertebrae 2 levels superior

Question 25

# transversospinalis Rotatores innervation

Answer 25

Dorsal rami of spinal nerves

Question 26

# transversospinalis Rotatores blood supply

Answer 26

Posterior intercostal arteries, lumbar arteries

Question 27

# transversospinalis Rotatores action

Answer 27

Rotation of vertebral column

Question 28

# segmental muscles Levatores costarum origin

Answer 28

12 pairs, from transverse processes of C7-T11

Question 29

# segmental muscles Levatores costarum insertion

Answer 29

Longus – external surface of rib 2 levels below vertebrae of origin between tubercle and angle Brevis – rib between tubercle and angle 1 level below vertebrae of origin

Question 30

# segmental muscles Levatores costarum innervation

Answer 30

Dorsal rami of thoracic spinal nerves

Question 31

# segmental muscles Levatores costarum blood supply

Answer 31

Posterior intercostal arteries

Question 32

# segmental muscles Levatores costarum actions

Answer 32

Elevate ribs, assist in inspiration, rotates and laterally flexes vertebral column

Question 33

# segmental muscles Interspinales origin

Answer 33

Superiorly on spine of vertebrae

Question 34

# segmental muscles Interspinales insertion

Answer 34

Inferiorly on spine of vertebrae 1 level below origin

Question 35

# segmental muscles Interspinales innervation

Answer 35

Dorsal rami of spinal nerves

Question 36

# segmental muscles Interspinales blood supply

Answer 36

Muscular branches of posterior intercostal arteries, lumbar arteries, deep cervical branches of costocervical trunk

Question 37

# segmental muscles Interspinales action

Answer 37

Extension of vertebral column

Question 38

# segmental muscles Intertransversarii origin

Answer 38

Superiorly on transverse processes of vertebrae

Question 39

# segmental muscles Intertransversarii insertion

Answer 39

Inferiorly on transverse process 1 level below origin

Question 40

# segmental muscles Intertransversarii innervation

Answer 40

Dorsal rami of spinal nerves (exceptions lumbar and lower thoracic, anterior/posterior intertransversarii in cervical = ventral rami)

Question 41

# segmental muscles Intertransversarii blood supply

Answer 41

Muscular branches of posterior intercostal and lumbar arteries

Question 42

# segmental muscles Intertransversarii action

Answer 42

Lateral flexion of vertebral column

Question 43

What nerves are in the suboccipital region?

Answer 43

Greater occipital nerve, suboccipital nerve

Question 44

What arteries are in the suboccipital region?

Answer 44

Vertebral artery, occipital artery

Question 45

What does the suboccipital triangle contain?

Answer 45

Vertebral artery and suboccipital nerve lie in a groove on superior surface of the posterior arch of atlas

Question 46

# suboccipital region Rectus capitis posterior minor origin

Answer 46

Posterior tubercle of atlas

Question 47

# suboccipital region Rectus capitis posterior minor insertion

Answer 47

Occipital bone, below the inferior nuchal line

Question 48

# suboccipital region Rectus capitis posterior minor innervation

Answer 48

Suboccipital nerve

Question 49

# suboccipital region Rectus capitis posterior minor blood supply

Answer 49

Muscular branches of the vertebral artery, descending branch of occipital artery

Question 50

# suboccipital region Rectus capitis posterior minor actions

Answer 50

Extension and lateral flexion of head

Question 51

# suboccipital region Rectus capitis posterior major origin

Answer 51

Spinous process of axis

Question 52

# suboccipital region Rectus capitis posterior major insertion

Answer 52

Lateral part of inferior nuchal line of occipital

Question 53

# suboccipital region Rectus capitis posterior major innervation

Answer 53

Suboccipital nerve

Question 54

# suboccipital region Rectus capitis posterior major blood supply

Answer 54

Muscular branches of the vertebral artery, descending branch of occipital artery

Question 55

# suboccipital region Rectus capitis posterior major actions

Answer 55

Extension, lateral flexion, rotation of head

Question 56

# suboccipital region Obliquus capitis superior origin

Answer 56

Transverse process of atlas

Question 57

# suboccipital region Obliquus capitis superior insertion

Answer 57

Occipital bone above inferior nuchal line

Question 58

# suboccipital region Obliquus capitis superior innervation

Answer 58

Suboccipital nerve

Question 59

# suboccipital region Obliquus capitis superior blood supply

Answer 59

Muscular branches of the vertebral artery, descending branch of occipital artery

Question 60

# suboccipital region Obliquus capitis superior actions

Answer 60

Extension and lateral rotation of head

Question 61

# suboccipital region Obliquus capitis inferior origin

Answer 61

Spinous process of axis

Question 62

# suboccipital region Obliquus capitis inferior insertion

Answer 62

Transverse process of atlas

Question 63

# suboccipital region Obliquus capitis inferior innervation

Answer 63

Suboccipital nerve, dorsal ramus C2

Question 64

# suboccipital region Obliquus capitis inferior blood supply

Answer 64

Muscular branches of the vertebral artery, descending branch of occipital artery

Question 65

# suboccipital region Obliquus capitis inferior action

Answer 65

Rotation of atlas and skull around dens of axis