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Anatomy > Unit 1 > Flashcards

Unit 1 Flashcards

1
Q

Origin of the trapezius

A

medial third of superior nuchal line; external occipital protuberance; nuchal ligament; spinous processes of C7-T12 vertebrae

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2
Q

insertion of the trapezius

A

lateral third of clavicle; acromion and spine of scapula

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3
Q

innervation of trapezius

A

CN XI spinal accessory nerve (motor fibers) and C3 and C4 (pain and proprioceptive fibers)

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4
Q

actions of the trapezius (4)

A

DESC- elevates ASC- depresses MIDDLE/ALL- retracts scapula DESC & ASC- rotates glenoid cavity superiorly

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5
Q

origin of latissimus dorsi

A

spinous processes of inferior 6 thoracic vertebrae, thoracolumbar fascia, iliac crest, and inferior 3 or 4 ribs (~inferior angle of the scapula)

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6
Q

insertion of latissimus dorsi

A

floor of the intertubercular sulcus of the humerus

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7
Q

innervation of latissimus dorsi

A

thoracodorsal nerve (C6, C7, C8)

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8
Q

action of latissimus dorsi

A

Extends, adducts, and medially rotates humerus; raises body towards arms during climbing

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9
Q

origin of rhomboid major

A

spinous processes of T2-T5 vertebrae

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10
Q

insertion of rhomboid major

A

medial border of scapula from level of spine to inferior angle

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11
Q

innervation of rhomboid major

A

dorsal scapular nerve C4 C5

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12
Q

action of rhomboid major

A

retract scapula and rotate glenoid cavity inferiorly; fix scapula to thoracic wall

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13
Q

origin of rhomboid minor

A

spinous process of C7 and T1 vertebrae; nuchal ligament

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14
Q

insertion of rhomboid minor

A

smooth triangular area at the medial end of the scapular spine

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15
Q

innervation of rhomboid minor

A

dorsal scapular nerve C4 C5

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16
Q

action of rhomboid minor

A

retract scapula and rotate glenoid cavity inferiorly; fix scapula to thoracic wall

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17
Q

origin of levator scapulae

A

posterior tubercles of transverse processes of C1- C4 vertebrae

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18
Q

insertion of levator scapulae

A

medial border of scapula superior to the root of the scapular spine

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19
Q

innervation of lev scap

A

dorsal scapular C4 C5 and cervical C3 and C4

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20
Q

action of lev scap

A

elevate scapula and rotate glenoid cavity inferiorly by rotating scapula

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21
Q

origin of splenius cervicis

A

nuchal ligament and spinous process of C7- T6 vertebrae

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22
Q

insertion of splenius cervicis

A

tubercles of transverse processes of C1- C3 or C4 vertebrae

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23
Q

innervation of splenius cervicis

A

posterior rami of spinal nerves

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24
Q

action of splenius cervicis

A

alone: laterally flex and rotate head to side of active muscles together: extend head and neck

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25
Q

origin of splenius capitis

A

nuchal ligament of spinous processes of C7-T6 vertebrae

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26
Q

insertion of splenius capitis

A

fibers run superolaterally to the mastoid process of temporal bone and lateral third of superior nuchal line of occipital bone

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27
Q

innervation of splenius capitis

A

posterior rami of spinal nerves

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28
Q

action of splenius capitis

A

alone: laterally flex neck and rotate head to side of active muscles together: extend head and neck

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29
Q

origin of serratus posterior superior

A

nuchal ligament; spinous processes of C7- T3 vertebrae

30
Q

insertion of serratus posterior superior

A

superior borders of 2nd to 4th ribs

31
Q

innervation of serratus posterior superior

A

2nd to 5th intercostal nerves

32
Q

action of serratus posterior superior

A

elevates ribs (proprioception)

33
Q

origin of serratus posterior inferior

A

spinous processes of T11 to L2 vertebrae

34
Q

insertion of serratus posterior inferior

A

inferior borders of 8th to 12th ribs near their angles

35
Q

innervation of serratus posterior inferior ***

A

anterior rami of T9- T12 thoracic spinal nerves

36
Q

action of serratus posterior inferior

A

depresses ribs (proprioception)

37
Q

origin of iliocostalis

A

posterior surface of iliac crest, thoracolumbar fascia, sacral and lower lumbar spinous processes

38
Q

insertion of iliocostalis

A

superior to angle of lower ribs; cervical transverse processes

39
Q

innervation of iliocostalis

A

posterior rami of spinal nerves

40
Q

action of iliocostalis

A
  • Bilaterally contracted: aid in extension of appropriate spinal regions
  • Unilateral contraction: aids in lateral flexion of vertebral column
41
Q

origin of longissimus

A

posterior surface of iliac crest, thoracolumbar fascia, sacral and lower lumbar spinous processes

42
Q

insertion of longissimus

A

superior to ribs between tubercles and angles to the transverse processes of thoracic and cervical regions, mastoid process

43
Q

innervation of longissimus

A

posterior rami of spinal nerves

44
Q

action of longissimus

A

bilaterally: aid in extension of appropriate spinal regions unilaterally: aids in lateral flexion of vertebral column

45
Q

origin of spinalis

A

supraspinous and nuchal ligament, spinous processes

46
Q

insertion of spinalis

A

passes superomedially to adjacent spinous processes (4-6 segments)

47
Q

innervation of spinalis

A

posterior rami of spinal nerves

48
Q

action of spinalis

A

bilaterally: aide in extension of appropriate spinal regions unilaterally: aid in lateral flexion of vertebral column

49
Q

origin of semispinalis (capitis and cervicis)

A

arises from the transverse processes of C4-T12 vertebrae

50
Q

insertion of semispinalis

A

fibers run superomedially to occipital and spinous processes in thoracic and cervical regions, spanning 4-6 segments

51
Q

innervation of semispinalis

A

posterior rami of spinal nerves

52
Q

action of semispinalis

A

extends head and thoracic and cervical regions of the vertebral column and rotates them contralaterally

53
Q

origin of interspinalis

A

superior surfaces of spinous processes of cervical and lumbar vertebrae

54
Q

insertion of interspinalis

A

inferior surfaces of spinous processes of vertebrae superior to vertebrae of proximal attachment

55
Q

innervation of interspinalis

A

posterior rami of spinal nerves

56
Q

action of interspinalis

A

aid in extension and rotation of the spinal column

57
Q

origin of intertransversarii

A

transverse processes of cervical and lumbar vertebrae

58
Q

insertion of intertransversarii

A

transverse processes of adjacent vertebrae

59
Q

innervation of intertransversarii ***

A

posterior and anterior rami of spinal nerves

60
Q

action of intertransversarii

A

aid in lateral flexion of the vertebral column; bilaterally stabilize the VC

61
Q

origin of multifidus

A

posterior sacrum, PSIS, sacro-iliac ligaments, mamillary processes of lumbar vertebrae, transverse processes of C4-C7

62
Q

insertion of multifidus

A

fibers pass obliquely superomedially to the entire length of spinous processes, located 2-4 segments superior to the proximal attachment

63
Q

innervation of multifidus (different branch)

A

medial branch of posterior dorsal ramus

64
Q

action of multifidus

A

stabilizes vertebrae during local movements of the vertebral column

65
Q

origin of rotatores

A

arises from the accessory process of lumbar vertebrae

66
Q

insertion of rotatores

A

fibers pass superomedially to attach lamina, transverse processes, and spinous processes of vertebrae at a junction, immediately as a brevis, or 2 segments superior to vertebrae of attachment as a longus

67
Q

innervation of rotatores

A

posterior rami of spinal nerves

68
Q

action of rotatores

A

stabilize the vertebrae and assist with extension and rotatory movements of VC; may fx as organ of proprioception

69
Q

origin levatores costarum

A

tips of transverse processes of C7 and T1-T11 vertebrae

70
Q

insertion of levatores costarum

A

subadjacent ribs between the tubercle and the angle

71
Q

innervation of levatores costarum (specific)

A

posterior rami of C8-T11 spinal nerves

72
Q

action of levatores costarum

A

elevates ribs, assisting with respiration; lateral flexion assistance of vertebral column

Anatomy (6 decks)

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