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Anatomy > Back Muscles- Action, Origin, Insertion, Etc > Flashcards

Back Muscles- Action, Origin, Insertion, Etc Flashcards

1
Q

Latissimus Dorsi- Origin and Insertion

A

Origin: T7-T12 spinous process; Thoracolumbar Fascia; inferior scapular angle; ribs 9-12

Insertion: Floor of the intertubercular groove (humerous)

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2
Q

Latissimus Dorsi- Action

A

Extends, adducts, medially rotates shoulder; raises body toward arms when hanging

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3
Q

Latissimus Dorsi- innervation

A

Thoracodorsal n. (C6-C8)

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4
Q

Latissimus Dorsi- supply

A

thoracodorsal a.

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5
Q

Trapezius- origin and insertion

A

Origin: Medial 1/3 of superior nuchal line; External occipital protuberance; Ligamentum nuchae; C7-T12 spinous process

Insertion: Lateral 1/3 of clavicle; acromin; scapular spine

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6
Q

Trapezius- action

A

Elevates, depresses, and retracts scapula and rotates glenoid fossa; Steadies scap to thoracic wall; unilaterally flexes to the same side

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7
Q

Trapezius- innervation

A

Cranial Nerve XI (spinal accessory nerve); C3-4 pain and proprioception

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8
Q

Trapezius- supply

A

Transverse cervical a.

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9
Q

Levator scapulae- Origin and insertion

A

Origin: C1-C4 transverse process

Insertion: Superior angle

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10
Q

Levator scapulae- action

A

Elevates scapula; rotates glenoid fossa inferiorly; unilat flex of neck to same side

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11
Q

Levator scapulae- innervation

A

Dorsal scapular n. (C5); C3-4 spinal nerves

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12
Q

Levator scapulae- supply

A

Dorsal scapular a.

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13
Q

Rhomboid major- origin and insertion

A

Origin: T2-T5 spinous process

Insertion: Medial border of scapula

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14
Q

Rhomboid major- Action

A

Retracts scap; rotates glenoid fossa inferiorly; steadies scapula to thoracic wall

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15
Q

Rhomboid major- Innervation

A

Dorsal scapular n. (C5)

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16
Q

Rhomboid major- supply

A

Dorsal scapular a.

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17
Q

Rhomboid minor- origin and insertion

A

Origin: Ligamentum nuchae, C7-T1 spinous process

Insertion: Medial border of scapula (root of scap spine)

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18
Q

Rhomboid minor- Action

A

Shared with the major, only difference is this one unilaterally inclines neck to the same side

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19
Q

Rhomboid minor- Innervation

A

Dorsal scapular n. (C5)

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20
Q

Rhomboid minor- supply

A

Dorsal scapular a.

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21
Q

Serratus posterior superior- Prox and distal attachment

A

Proximal: lig nuchae, C3-T3 spinous process

Distal: ribs 2-4

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22
Q

Serratus posterior superior- action

A

Proprioception

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23
Q

Serratus posterior superior- innervation

A

Anterior rami T2-T5 thoracic spinal n.

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24
Q

Serratus posterior superior- supply

A

Intercostal aa.

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25
Q

Serratus posterior inferior- prox and dist attachments

A

Prox: T11-L2 spinous process

Distal: Ribs 8-12

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26
Q

Serratus posterior inferior- action

A

Proprioception

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27
Q

Serratus posterior inferior- innervation

A

Anterior rami T9-12, thoracic spinal n.

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28
Q

Serratus posterior inferior- supply

A

Intercostal aa., subcostal a., lumbar aa.

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29
Q

Splenius cervicis- prox and distal atach

A

Prox: T3-T6 spinous process

Distal: C1-C3 trans process

30
Q

Splenius cervicis- action

A

Bilaterally extends neck; unilat flexes and rotates neck to same side

31
Q

Splenius cervicis- innervation

A

Posterior rami spinal nerves

32
Q

Splenius cervicis- supply

A

Occipital, transverse cervical, and intercostal aa.

33
Q

Splenius capitis- prox and dist attach

A

Prox: Lig nuchae, C7-T4 spinous process

Distal: mastoid process, 1/3 sup nuchal line

34
Q

Splenius capitis- action

A

Bilat extends neck, unilat flex and rot neck to same side

35
Q

Splenius capitis- innervation

A

Posterior rami of spinal nerves

36
Q

Splenius capitis- supply

A

Occipital and transverse cervical aa.

37
Q

Iliocostalis (lumborum, thoracis, cervicis)- prox and dist attach

A

Prox: broad tendon from iliac crest, sacrum, lumbar and lower thoracic spinous processes

Distal*: andles of lower ribs and cerv transverse processes

38
Q

Iliocostalis (lumborum, thoracis, cervicis)- action

A

Bilaterally extend spine (head); unilat flexes spine (and head) to same side

39
Q

Iliocostalis (lumborum, thoracis, cervicis)- innerve

A

Segmentally innervated by post rami of spinal nn.

40
Q

Iliocostalis (lumborum, thoracis, cervicis)- supply

A

Segmentally supplied by deep cerv, intercost, subcost, and lumbar aa.

41
Q

Longissimus (thoracis, cervicis, capitis)- prox and distal attach

A

Prox: Broad tendon from iliac crest, sacrum, and lum/lower thor spinous processes

Distal*: Thor and cerv transverse processes; mastoid process

42
Q

Longissimus (thoracis, cervicis, capitis)- action

A

Bilaterally extend spine (and head); unilat flex spine (and head) to same side

43
Q

Longissimus (thoracis, cervicis, capitis)- inervation

A

Segmentally innervated by posterior rami of spinal nn.

44
Q

Longissimus (thoracis, cervicis, capitis)- supply

A

Segmentally supplied by deep cerv, intercostal, subcostal, and lum aa.

45
Q

Spinalis (thoracis and cervicis)- prox and distal attach

A

Prox: Broad tendon from iliac crest, sacrum, lumbar and thoracic spinous processes

Distal*: Thoracic and Cervical spinous processes

46
Q

Spinalis (thoracis and cervicis)- innervation

A

Segmentally innervated from posterior rami of spinal nn.

47
Q

Spinalis (thoracis and cervicis)- action

A

Bilat extend spine and head; unilat flexes spine (and head) to same side

48
Q

Spinalis (thoracis and cervicis)- supply

A

Segmentally supplied from deep cerv, intercostal, subcostal, and lumnbar aa.

49
Q

Semispinalis (thoracis, cervicis, capitis)- prox and distal attach

A

Prox: C4-6 articular processes; T7-12 trans processes

Distal: Occipital and spinous processes of superior vertebrae spanning 4-6 segments

50
Q

Semispinalis (thoracis, cervicis, capitis)- action

A

Bilat extends spine; unilat flexes spine to same side and rotates to opposite side

51
Q

Semispinalis (thoracis, cervicis, capitis)- innervation

A

Segmentally innerv by posterior rami of spinal nerves

52
Q

Semispinalis (thoracis, cervicis, capitis)- supply

A

Segmentally supplied by deep cerv, intervostal, subcostal, and lumbar aa.

53
Q

Multifidus- prox and distal attach

A

Prox: Sacrum, ilium, mamillary, transverse, and articular processes

Distal: C2 spinous process of superior vert., spanning 2-4 segments

54
Q

Multifidus- action

A

Bilat extends spine; unilat flexes spine to same side and rotate to opposing side

55
Q

Multifidus- innerv

A

posterior rami of spinal nerves (segmental)

56
Q

Multifidus- supply

A

Deep cerv, intercostal, subcostal, and lumbar aa. (Segmented)

57
Q

Rotatores (longus and brevis)- prox and distal attach

A

Proximal: T1-T12 transverse processes

Distal: Between laminae and SP of superior vertebrae (1-2 segments)

58
Q

Rotatores (longus and brevis)- action

A

Bilaterally flexes spine to same side; unilaterally rotates spine to opposite side

59
Q

Rotatores (longus and brevis)- innervation

A

Posterior rami of spinal nerves (segmented)

60
Q

Rotatores (longus and brevis)- supply

A

Intercostal, deep cervical, subcostal, and lumbar aa. (Segmented)

61
Q

Interspinales (cervicis, thoracis, lumborum)- prox and distal attach

A

Proximal and distal: Traverse between adjacent SP C1-5

62
Q

Interspinales (cervicis, thoracis, lumborum)- action

A

Assists in spinal extension

63
Q

Interspinales (cervicis, thoracis, lumborum)- innervation

A

Posterior rami of spinal nerves

64
Q

Interspinales (cervicis, thoracis, lumborum)- supply

A

Segment: deep cerv, intercostal, subcostal, lum aa.

65
Q

Intertransversarii (cervicis, thoracis, lumborum)- prox and dist

A

Prox and Distal: Traverse between adjacent transverse processes C2-L5

66
Q

Intertransversarii (cervicis, thoracis, lumborum)- action

A

Bilaterally stabilizes spine; unilaterally assists in lateral flexion

67
Q

Intertransversarii (cervicis, thoracis, lumborum)- innervation

A

Anterior and posterior rami of spinal nerves

68
Q

Intertransversarii (cervicis, thoracis, lumborum)- supply

A

Seg: deep cervical, intercostal, subcostal, and lumbar aa.

69
Q

Levatores costarum (longus and brevis)- prox and dist attach

A

Proximal: C7-T11 transverse processes

Distal: Subjacent rib (brevis) or two ribs below near angle (longus?)

70
Q

Levatores costarum (longus and brevis)- action

A

Bilaterally elevates ribs and slightly extends thor spine; unilat flexes spine to same side and rotates to opposing side

71
Q

Levatores costarum (longus and brevis)- innervation

A

Posterior rami of spinal nerves

72
Q

Levatores costarum (longus and brevis)- supply

A

Deep cervical, intercostal, subcostal, and lumbar aa.

Anatomy (8 decks)

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