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Unit 1 Back > Intrinsic back muscles and suboccipital triangle > Flashcards

Intrinsic back muscles and suboccipital triangle Flashcards

1
Q

What is the insertion of levator scapulae?

A

superior angle of the scapula

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2
Q

What is the origin of the serratus posterior superior?

A

spinous process C7-T3, nuchal ligament

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3
Q

What is the origin of the serratus posterior inferior?

A

spinous process T11-L2

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4
Q

What is the insertion of serratus posterior superior?

A

2nd to 4th ribs

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5
Q

What is the insertion of serratus posterior inferior?

A

inferior borders of 8th to 12th ribs

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6
Q

origin of iliocostalis cervicis

A

3rd to 7th ribs

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7
Q

insertion of iliocostalis cervicis

A

Transverse process C4-C6

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8
Q

What is the origin of levator scapulae?

A

Transverse process of C1-C4

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9
Q

innervation of levator scapulae

A

dorsal scapular nerve (C4-C5)

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10
Q

action of levator scapulae

A

elevates the scapula

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11
Q

innervation of serratus posterior inferior

A

spinal nerve T9-T12 (anterior rami)

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12
Q

action of serratus posterior inferior

A

depresses ribs

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14
Q

action of serratus posterior superior

A

elevates ribs

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16
Q

innervation of serratus posterior superior

A

spinal nerve T2-T5 (anterior rami)

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17
Q

origin of iliocostalis thoracis

A

7-12th ribs

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18
Q

insertion of iliocostalis thoracis

A

1-6th ribs

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19
Q

origin of iliocostalis lumborum

A

sacrum, iliac crest, thoracolumbar fascia

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20
Q

insertion of iliocostalis lumborum

A

6th-12ribs, thoracolumbar fascia (deep layer), transverse processes of upper lumbar vertebrae

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21
Q

innervation of iliocostalis muscles

A

spinal nn. C8-L1 (posterior rami, lateral branches)

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22
Q

action of intercostalis muscles

A

bilateral: extends the spine
unilateral: bends spine laterally to the same side

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23
Q

origin of longissimus capitis

A

transverse processes T1-T3; transverse and articulate process C4-C7

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24
Q

insertion of longissimus capitis

A

mastoid process of the temporal bone

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25
Q

origin of longissimus cervicis

A

transverse processes of T1-T6

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26
Q

insertion of longissimus cervicis

A

transverse processes of C2-C5

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27
Q

origin of longissimus thoracis

A

sacrum, iliac crest, spinous processes of lumbar vertebrae, transverse processes of lower thoracic vertebrae

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28
Q

insertion of longissimus thoracis

A

2-12th rib, costal processes of lumbar, transverse processes of thoracic

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29
Q

innervation of longissimus muscles

A

spinal nn. C1-L5

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30
Q

action of longissimus muscles

A

capitis: bilateral - extends head; unilateral - flexes and rotates head to same side

cervicis and thoracis: bilateral - extends spine; unilateral - bends spine laterally to the same side

31
Q

origin of spinalis cervicis

A

spinous processes of C5-T2

32
Q

insertion of spinalis cervicis

A

spinous processes of C2-C5

33
Q

origin of spinalis thoracis

A

spinous processes of T10-L3

34
Q

insertion of spinalis thoracis

A

spinous processes of T2-T8

35
Q

innervation of spinalis muscles

A

spinal nn. (posterior rami)

36
Q

action of spinalis muscles

A

bilateral: extends thoracic and cervical spine
unilateral: bends thoracic and cervical spine to the same side

37
Q

origin of splenius capitis

A

nuchal ligament, C3-C7 spinous process

38
Q

insertion of splenius capitis

A

occipital bone (superior nuchal line, mastoid process)

39
Q

origin of splenius cervicis

A

T3-T6 spinous process

40
Q

insertion of splenius cervicis

A

C1-C2 transverse process

41
Q

innervation of splenius muscles

A

spinal nn. C1-C6 (post. rami, lateral branches)

42
Q

action of splenius muscles

A

bilateral: extends cervical spine and head
unilateral: flexes and rotates head to the same side

43
Q

origin of semispinalis capitis

A

C4-T7 transverse and articular processes

44
Q

insertion of semispinalis capitis

A

in between superior and inferior nuchal lines

45
Q

origin of semispinalis cervicis

A

T1-T6 transverse processes

46
Q

insertion of semispinalis cervicis

A

C2-C5 spinous process

47
Q

origin of semispinalis thoracis

A

T6-T12 transverse process

48
Q

insertion of semispinalis thoracis

A

C6-T4 transverse process

49
Q

innervation of semispinalis

A

posterior rami

50
Q

action of semispinalis

A

bilateral: extends cervical and thoracic spines and head
unilateral: bends head, cervical and thoracic spines to the same side, rotates to opposite side

51
Q

origin and insertion of multifidus

A

C2-sacrum (between transverse and spinous processes, skipping two to four vertebrae)

52
Q

innervation of multifidus

A

posterior rami

53
Q

action of multifidus

A

bi: extends spine
uni: flexes spine to the same side, rotates to the opposite side

54
Q

origin and insertion of rotatores breves

A

T1-T12 (between transverse and spinous processes of adjacent vertebrae)

55
Q

origin and insertion of rotatores longi

A

T1-T12 (between transverse and spinous processes, skipping one vertebrae)

56
Q

innervation of rotatores

A

posterior rami

57
Q

action of rotatores

A

bi: extends thoracic spine
uni: rotates spine to opposite side

58
Q

origin of obliquus capitis superior

A

C1transverse process

59
Q

insertion of obliquus capitis superior

A

inferior nuchal line (middle third)

60
Q

origin of obliquus capitis inferior

A

C2 spinous process

61
Q

insertion of obliquus capitis inferior

A

C1 transverse process

62
Q

innervation of obliquus capitis

A

C1 (posterior ramus, suboccipital n.)

63
Q

action of oliquus capitis superior

A

Bilateral: extends head
Unilateral: tilts head ipsilaterally, rotates contra-laterally.

64
Q

origin of rectus capitis posterior major

A

C2 spinous process

65
Q

insertion of rectus capitis posterior major

A

inferior nuchal line,middle third

66
Q

origin of rectus capitis posterior minor

A

C1 (posterior tubercle)

67
Q

insertion of rectus capitis posterior minor

A

inferior nuchal line, inner third

68
Q

innervation of rectus capitis posterior major/minor

A

C1 (posterior ramus, suboccipital n.)

69
Q

action of rectus capitis posterior major/minor

A

extends head

70
Q

Action of the obliquus capitis posterior inferior

A

Bilateral: extends the head
Unilateral: rotates ipsilaterally

Unit 1 Back (4 decks)

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