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Anatomy > Intrinsic Back Muscles - Exam 1 > Flashcards

Intrinsic Back Muscles - Exam 1 Flashcards

1
Q

intrinsic back muscles function

A

aid in posture, acts on vertebral column

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2
Q

superficial intrinsic back muscles

A

splenius capitis, splenius cervicis

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3
Q

splenius capitis origin

A

nuchal ligament

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4
Q

splenius capitis insertion

A

superior nuchal line and mastoid process

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5
Q

splenius capitis innervation

A

dorsal primary rami

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6
Q

splenius capitis actions

A

bilat - extends head and neck
unilat - ipsilateral flexion and rotation

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7
Q

splenius cervicis origin

A

SP of T3-T6

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8
Q

splenius cervicis insertion

A

TP of C1-C3

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9
Q

splenius cervicis innervation

A

dorsal primary rami

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10
Q

splenius cervicis actions

A

bilat - extends head and neck
unilat - ipsilateral flexion of spine

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11
Q

intermediate intrinsic muscles

A

iliocostalis
longissimus
spinalis

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12
Q

iliocostalis origin

A

iliac crest and sacrum

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13
Q

iliocostalis insertion

A

TP of C4-C6
**intermediate attachments along rib cage

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14
Q

iliocostalis innervation

A

dorsal primary rami

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15
Q

iliocostalis actions

A

bilateral - extension of spine
unilat - ipsilateral flexion of spine

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16
Q

longissimus origin

A

iliac crest and SP of lumbar vertebrae

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17
Q

longissimus insertion

A

mastoid process of temporal bone
**intermediate attachments of TPs of thoracic and cervical vertebrae

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18
Q

longissimus innervation

A

dorsal primary rami

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19
Q

longissimus actions

A

bilateral - extension of spine and head
unilateral - ipsilateral flexion of spine and head

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20
Q

spinalis origin

A

SP of T11-L2

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21
Q

spinalis insertion

A

occipital bone
**intermediate attachments on SPs of thoracic and cervical vertebrae and nuchal ligament

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22
Q

spinalis innervation

A

dorsal primary rami

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23
Q

spinalis actions

A

bilateral - extension of spine and head
unilateral - ipsilateral flexion of spine and head

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24
Q

deep intrinsic muscles

A

semispinalis capitis
semispinalis cervicis
semispinalis thoracis
multifidus
rotatores

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25
Q

semispinalis capitis origin

A

articular processes of cervical vertebrae

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26
Q

semispinalis capitis insertion

A

occipital bone

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27
Q

semispinalis capitis innervation

A

dorsal primary rami

28
Q

semispinalis capitis actions

A

bilateral - extends head/cervical/thoracic spine
unilateral - ipsilateral flexion of head and contralateral rotation of head/cervical/thoracic spine

29
Q

semispinalis cervicis origin

A

TP of T1-T6

30
Q

semispinalis cervicis insertion

A

SP of cervical vertebrae

31
Q

semispinalis cervicis innervation

A

dorsal primary rami

32
Q

semispinalis cervicis actions

A

bilateral - extends cervical/thoracic spine
unilateral - ipsilateral flexion and contralateral rotation of cervical/thoracic spine

33
Q

semispinalis thoracis origin

A

TP of T6-T10

34
Q

semispinalis thoracis insertion

A

SP of C6-T4

35
Q

semispinalis thoracis innervation

A

dorsal primary rami

36
Q

semispinalis thoracis actions

A

bilateral - extends thoracic spine
unilateral - ipsilateral flexion of spine and contralateral rotation of thoracic spine

37
Q

multifidus origin

A

sacrum and maxillary bodies of lumbar vertebrae

38
Q

multifidus insertion

A

SP of atlas
**intermediate attachments on SP of vertebrae 2-3 above origin

39
Q

multifidus innervation

A

dorsal primary rami

40
Q

multifidus actions

A

bilateral - stabilization of vertebral column, extension of spine
unilateral - ipsilateral flexion and contralateral rotation

41
Q

rotatores origin

A

TP of thoracic vertebrae

42
Q

rotatores insertion

A

SP of thoracic vertebrae 1-2 levels up

43
Q

rotatores innervation

A

dorsal primary rami

44
Q

rotatores actions

A

proprioception, stabilization of spine, local extension/rotation (contralateral) of vertebrae

45
Q

suboccipital triangle

A

rectus capitis posterior major/minor
obliques capitis superior/inferior

46
Q

rectus capitis posterior major origin

47
Q

rectus capitis posterior major insertion

A

inferior nuchal line of occipital bone

48
Q

rectus capitis posterior major blood supply

A

vertebral artery and occipital artery

49
Q

rectus capitis posterior major innervation

A

suboccipital nerve

50
Q

rectus capitis posterior major actions

A

extend head at atlantooccipital joint
ipsilateral flexion and rotation

51
Q

rectus capitis posterior minor origin

A

posterior tubercle of C1

52
Q

rectus capitis posterior minor insertion

A

inferior nuchal line of occipital bone

53
Q

rectus capitis posterior minor blood supply

A

vertebral artery and occipital artery

54
Q

rectus capitis posterior minor innervation

A

suboccipital nerve

55
Q

rectus capitis posterior minor actions

A

extends head at atlantooccipital joint, ipsilateral flexion and rotation

56
Q

obliquus capitis superior origin

57
Q

obliquus capitis superior insertion

A

inferior nuchal line of occipital bone

58
Q

obliquus capitis superior blood supply

A

vertebral artery and occipital artery

59
Q

obliquus capitis superior innervation

A

suboccipital nerve

60
Q

obliquus capitis superior actions

A

extend head at atlantooccipital joint
ipsilateral flexion and rotation

61
Q

obliquus capitis inferior origin

62
Q

obliquus capitis inferior insertion

A

transverse process C1

63
Q

obliquus capitis inferior blood supply

A

vertebral artery and occipital artery

64
Q

obliquus capitis inferior innervation

A

suboccipital nerve

65
Q

obliquus capitis inferior actions

A

ipsilateral rotation

Anatomy (24 decks)

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