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Gross Anatomy I NYCC > Intrinsic Back Muscles - Deep > Flashcards

Intrinsic Back Muscles - Deep Flashcards

1
Q

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

A

Transversospinalis group, segmental muscles, suboccipital region

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2
Q

What muscles are included in the transversospinalis group?

A

Semispinalis, multifidus, rotatores longus and brevis

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3
Q

What are the segmental muscles?

A

Levatores costarum, interspinales, intertransversarii

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4
Q

What muscles are included in the suboccipital region?

A

Rectus capitis posterior major and minor
Obliquus capitis inferior and superior

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5
Q

transversospinalis

Semispinalis capitis origin

A

Transverse processes of upper 6-7 thoracic vertebrae

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6
Q

transversospinalis

Semispinalis capitis insertion

A

Occipital bone between superior and inferior nuchal lines

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7
Q

transversospinalis

Semispinalis capitis innervation

A

Medial branches of dorsal rami C1-C6

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8
Q

transversospinalis

Semispinalis capitis blood supply

A

Descending branch of occipital artery, deep branch of costocervical trunk

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9
Q

transversospinalis

Semispinalis capitis actions

A

Bilaterally extends neck
Unilaterally turns face toward opposite side

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9
Q

transversospinalis

Semispinalis cervicis origin

A

Transverse processes of upper 5-6 thoracic vertebrae

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9
Q

transversospinalis

Semispinalis cervicis insertion

A

Spinous processes C2-C5

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10
Q

transversospinalis

Semispinalis cervicis innervation

A

Medial branches of dorsal rami C6-C8

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11
Q

transversospinalis

Semispinalis cervicis blood supply

A

Deep branch of costocervical trunk, posterior intercostal arteries

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12
Q

transversospinalis

Semispinalis cervicis actions

A

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

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13
Q

transversospinalis

Semispinalis thoracis origin

A

Transverse processes of lower 6 thoracic vertebrae

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14
Q

transversospinalis

Semispinalis thoracis insertion

A

Spinous processes of upper thoracic and lower cervical vertebrae

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15
Q

transversospinalis

Semispinalis thoracis innervation

A

Dorsal rami of spinal nerves T1-T6

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16
Q

transversospinalis

Semispinalis thoracis blood supply

A

Posterior intercostal arteries

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17
Q

transversospinalis

Semispinalis thoracis actions

A

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

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18
Q

transversospinalis

Multifidus origins

A

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

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19
Q

transversospinalis

Multifidus insertion

A

Spines of vertebrae 2-4 segments superior to origin

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20
Q

transversospinalis

Multifidus innervation

A

Dorsal rami of all spinal nerves

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21
Q

transversospinalis

Multifidus blood supply

A

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

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22
Q

transversospinalis

Multifidus actions

A

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

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23
Q

transversospinalis

Rotatores origin

A

Transverse processes of vertebrae

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24
Q

transversospinalis

Rotatores insertion

A

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

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25
Q

transversospinalis

Rotatores innervation

A

Dorsal rami of spinal nerves

26
Q

transversospinalis

Rotatores blood supply

A

Posterior intercostal arteries, lumbar arteries

27
Q

transversospinalis

Rotatores action

A

Rotation of vertebral column

28
Q

segmental muscles

Levatores costarum origin

A

12 pairs, from transverse processes of C7-T11

29
Q

segmental muscles

Levatores costarum insertion

A

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

30
Q

segmental muscles

Levatores costarum innervation

A

Dorsal rami of thoracic spinal nerves

31
Q

segmental muscles

Levatores costarum blood supply

A

Posterior intercostal arteries

32
Q

segmental muscles

Levatores costarum actions

A

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

33
Q

segmental muscles

Interspinales origin

A

Superiorly on spine of vertebrae

34
Q

segmental muscles

Interspinales insertion

A

Inferiorly on spine of vertebrae 1 level below origin

35
Q

segmental muscles

Interspinales innervation

A

Dorsal rami of spinal nerves

36
Q

segmental muscles

Interspinales blood supply

A

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

37
Q

segmental muscles

Interspinales action

A

Extension of vertebral column

38
Q

segmental muscles

Intertransversarii origin

A

Superiorly on transverse processes of vertebrae

39
Q

segmental muscles

Intertransversarii insertion

A

Inferiorly on transverse process 1 level below origin

40
Q

segmental muscles

Intertransversarii innervation

A

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

41
Q

segmental muscles

Intertransversarii blood supply

A

Muscular branches of posterior intercostal and lumbar arteries

42
Q

segmental muscles

Intertransversarii action

A

Lateral flexion of vertebral column

43
Q

What nerves are in the suboccipital region?

A

Greater occipital nerve, suboccipital nerve

44
Q

What arteries are in the suboccipital region?

A

Vertebral artery, occipital artery

45
Q

What does the suboccipital triangle contain?

A

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

46
Q

suboccipital region

Rectus capitis posterior minor origin

A

Posterior tubercle of atlas

47
Q

suboccipital region

Rectus capitis posterior minor insertion

A

Occipital bone, below the inferior nuchal line

48
Q

suboccipital region

Rectus capitis posterior minor innervation

A

Suboccipital nerve

49
Q

suboccipital region

Rectus capitis posterior minor blood supply

A

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

50
Q

suboccipital region

Rectus capitis posterior minor actions

A

Extension and lateral flexion of head

51
Q

suboccipital region

Rectus capitis posterior major origin

A

Spinous process of axis

52
Q

suboccipital region

Rectus capitis posterior major insertion

A

Lateral part of inferior nuchal line of occipital

53
Q

suboccipital region

Rectus capitis posterior major innervation

A

Suboccipital nerve

54
Q

suboccipital region

Rectus capitis posterior major blood supply

A

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

55
Q

suboccipital region

Rectus capitis posterior major actions

A

Extension, lateral flexion, rotation of head

56
Q

suboccipital region

Obliquus capitis superior origin

A

Transverse process of atlas

57
Q

suboccipital region

Obliquus capitis superior insertion

A

Occipital bone above inferior nuchal line

58
Q

suboccipital region

Obliquus capitis superior innervation

A

Suboccipital nerve

59
Q

suboccipital region

Obliquus capitis superior blood supply

A

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

60
Q

suboccipital region

Obliquus capitis superior actions

A

Extension and lateral rotation of head

61
Q

suboccipital region

Obliquus capitis inferior origin

A

Spinous process of axis

62
Q

suboccipital region

Obliquus capitis inferior insertion

A

Transverse process of atlas

63
Q

suboccipital region

Obliquus capitis inferior innervation

A

Suboccipital nerve, dorsal ramus C2

64
Q

suboccipital region

Obliquus capitis inferior blood supply

A

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

65
Q

suboccipital region

Obliquus capitis inferior action

A

Rotation of atlas and skull around dens of axis

Gross Anatomy I NYCC (15 decks)

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