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MSK 1 > Back Muscles > Flashcards

Back Muscles Flashcards

(95 cards)

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1
Q

Trapezius M. : Origin

A
  • Medial 1/3 of the superior nuchal line
  • External occipital protuberance
  • Nuchal L.
  • Spinous processes C7-T12
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2
Q

Trapezius M. : Insertion

A
  • Lateral 1/3 of clavicle
  • Acromion
  • Scapular spine
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3
Q

Trapezius M. : Action

A

Whole Muscle:

  • Retract the scapula
  • Rotate the glenoid cavity superiorly

Superior Part:
- Elevate scapula

Inferior Part:
- Depress scapula

With scapula fixed:

  • Extend neck (bilaterally)
  • Laterally flex neck (unilaterally)
  • Rotate face away (unilaterally)
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4
Q

Trapezius M. : Innervation

A

Spinal Accessory N.

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5
Q

Latissimus Dorsi M. : Origin

A
  • Spinous processes T6-L5
  • Ribs 9-12
  • Iliac crest
  • Median sacral crest via thoracolumbar fascia
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6
Q

Latissimus Dorsi M. : Insertion

A

Floor of humeral intertubercular groove

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7
Q

Latissimus Dorsi M. : Action

A
  • Extend humerus
  • Adduct humerus
  • Medially rotate humerus
  • Rotate glenoid cavity inferiorly
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8
Q

Latissimus Dorsi M. : Innervation

A

Thoracodorsal N.

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9
Q

Rhomboid Major M. : Origin

A

Spinous processes T2-T5

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10
Q

Rhomboid Major M. : Insertion

A

Medial border of scapula (inferior to scapular spine)

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11
Q

Rhomboid Major M. : Action

A
  • Retract scapula
  • Elevate scapula
  • Rotate the glenoid cavity inferiorly
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12
Q

Rhomboid Major M. : Innervation

A

Dorsal Scapular N.

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13
Q

Rhomboid Minor M. : Origin

A

Spinous processes C7, T1

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14
Q

Rhomboid Minor M. : Insertion

A

Medial border of scapula (at the scapular spine)

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15
Q

Rhomboid Minor M. : Action

A
  • Retract scapula
  • Elevate scapula
  • Rotate the glenoid cavity inferiorly
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16
Q

Rhomboid Minor M. : Innervation

A

Dorsal Scapular N.

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17
Q

Levator Scapulae M. : Origin

A

Posterior tubercles of transverse processes C1-C4

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18
Q

Levator Scapulae M. : Insertion

A

Medial border of scapula (superior to scapular spine)

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19
Q

Levator Scapulae M. : Action

A
  • Retract scapula
  • Elevate scapula
  • Rotate the glenoid cavity inferiorly

With scapula fixed:

  • Extend the neck (bilaterally)
  • Laterally flex the neck (unilaterally)
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20
Q

Levator Scapulae M. : Innervation

A

Dorsal Scapular N.

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21
Q

Serratus Posterior Superior M. : Insertion

A

Superior surfaces of ribs 2-5

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22
Q

Serratus Posterior Superior M. : Action

A
  • Elevate the ribs during forced inspiration

- Proprioception

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23
Q

Serratus Posterior Superior M. : Innervation

A

Intercostal NN. (2-5)

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24
Q

Serratus Posterior Inferior M. : Insertion

A

Inferior surfaces of ribs 8-12

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25
Serratus Posterior Inferior M. : Action
- Depress the ribs during forced expiration | - Proprioception
26
Serratus Posterior Inferior M. : Innervation
Anterior rami of T9-12
27
Splenius Capitis M. : Insertion
- Mastoid process temporal b. - Lateral 1/3 of superior nuchal line - Occipital b.
28
Splenius Capitis M. : Action
- Extend the neck (bilaterally) - Laterally flex the neck (unilaterally) - Rotate the face toward (unilaterally)
29
Splenius Capitis M. : Innervation
Posterior rami C3-C5
30
Splenius Cervicis M. : Insertion
Transverse processes C1-C3/C4
31
Splenius Cervicis M. : Action
- Extend the neck (bilaterally) - Laterally flex the neck (unilaterally) - Rotate the face toward (unilaterally)
32
Splenius Cervicis M. : Innervation
Posterior rami C5-C7
33
Illiocostalis Lumborum M. : Insertion
Costal angles ribs 7-12
34
Illiocostalis Lumborum M. : Action
- Maintain erect posture (bilaterally) - Extend the vertebral column (bilaterally) - Laterally flex the vertebral column (unilaterally)
35
Illiocostalis Lumborum M. : Innervation
Posterior rami of cervical, thoracic, and lumbar spinal N.
36
Illiocostalis Thoracis M. : Insertion
- Costal angles ribs 1-6 | - Transverse process C7
37
Illiocostalis Thoracis M. : Action
- Maintain erect posture (bilaterally) - Extend the vertebral column (bilaterally) - Laterally flex the vertebral column (unilaterally)
38
Illiocostalis Thoracis M. : Innervation
Posterior rami of cervical, thoracic, and lumbar spinal N.
39
Illiocostalis Cervicis M. : Insertion
- Posterior tubercles of transverse processes C4-C6
40
Illiocostalis Cervicis M. : Action
- Extend the neck (bilaterally) | - Laterally flex the neck (unilaterally)
41
Illiocostalis Cervicis M. : Innervation
Posterior rami of cervical, thoracic, and lumbar spinal N.
42
Longissimus Thoracis M. : Insertion
Ribs 3-12 between costal tubercle and costal angle
43
Longissimus Thoracis M. : Action
- Maintain erect posture (bilaterally) - Extend the vertebral column (bilaterally) - Laterally flex the vertebral column (unilaterally)
44
Longissimus Thoracis M. : Innervation
Posterior rami of cervical, thoracic, and lumbar spinal NN.
45
Longissimus Cervicis M. : Insertion
- Posterior tubercles of transverse processes C2-C6 | - Articular processes C2-C6
46
Longissimus Cervicis M. : Action
- Extend the neck (bilaterally) | - Laterally flex the neck (unilaterally)
47
Longissimus Cervicis M.: Innervation
Posterior rami of cervical, thoracic, and lumbar spinal NN.
48
Longissimus Capitis M.: Insertion
Mastoid process of temporal b.
49
Longissimus Capitis M. : Action
- Extend the neck (bilaterally) | - Laterally flex the neck (unilaterally)
50
Longissimus Capitis M. : Innervation
Posterior rami of cervical, thoracic, and lumbar spinal NN.
51
Spinalis Thoracis M. : Insertion
Spinous processes T1-T8
52
Spinalis Thoracis M. : Action
- Maintain erect posture (bilaterally) - Extend the vertebral column (bilaterally) - Laterally flex the vertebral column (unilaterally)
53
Spinalis Thoracis M. : Innervation
Posterior rami of cervical, thoracic, and lumbar spinal NN.
54
Spinalis Cervicis M. : Insertion
Spinous process T2
55
Spinalis Cervicis M. : Action
- Extend the neck (bilaterally) | - Laterally flex the neck (unilaterally)
56
Spinalis Cervicis M. : Innervation
Posterior rami of cervical, thoracic, and lumbar spinal NN.
57
Spinalis Capitis M. : Insertion
Usually blends in with semispinalis capitis m.
58
Spinalis Capitis M. : Action
- Extend the neck (bilaterally) | - Laterally flex the neck (unilaterally)
59
Spinalis Capitis M. : Innervation
Posterior rami of cervical, thoracic, and lumbar spinal NN.
60
Semispinalis Capitis M. : Insertion
Between superior and inferior nuchal lines on occipital b.
61
Semispinalis Capitis M. : Action
- Extend head | - Rotate face away
62
Semispinalis Capitis M. : Innervation
Posterior rami of cervical, thoracic, and lumbar spinal NN.
63
Semispinalis Cervicis M. : Insertion
Spinous processes C2-C5
64
Semispinalis Cervicis M. : Action
- Extend spine | - Rotate spine away
65
Semispinalis Cervicis M. : Innervation
Posterior rami of cervical, thoracic, and lumbar spinal NN.
66
Semispinalis Thoracis M. : Insertion
Spinous processes C6-T4
67
Semispinalis Thoracis M. : Action
- Extend spine | - Rotate spine away
68
Semispinalis Thoracis M. : Innervation
Posterior rami of cervical, thoracic, and lumbar spinal NN.
69
Multifidus MM. (Lumborum, Thoracis, Cervicis): Insertion
Spinous processes 3-4 segments superiorly; does not insert on atlas
70
Multifidus MM. (Lumborum, Thoracis, Cervicis): Action
- Extend spine | - Rotate spine away
71
Multifidus MM. (Lumborum, Thoracis, Cervicis): Innervation
Posterior rami of cervical, thoracic, and lumbar spinal NN.
72
Rotatores Longus MM. (Lumborum, Thoracis, Cervicis): Insertion
Roots of spinous processes 2 segments superiorly
73
Rotatores Longus MM. (Lumborum, Thoracis, Cervicis): Action
- Extend spine away - Rotate spine away - Proprioception
74
Rotatores Longus MM. (Lumborum, Thoracis, Cervicis): Innervation
Posterior rami of cervical, thoracic, and lumbar spinal NN.
75
Rotatores Brevis MM. (Lumborum, Thoracis, Cervicis): Insertion
Roots of adjacent spinous processes
76
Rotatores Brevis MM. (Lumborum, Thoracis, Cervicis): Action
- Extend spine away - Rotate spine away - Proprioception
77
Rotatores Brevis MM. (Lumborum, Thoracis, Cervicis): Innervation
Posterior rami of cervical, thoracic, and lumbar spinal NN.
78
Interspinalis M. : Insertion
Adjacent spinous process
79
Interspinalis M. : Action
Extend spine
80
Interspinalis M. : Innervation
Suboccipital N. (posterior ramus 1st cervical spinal N.)
81
Intertransversarii M. : Insertion
Adjacent transverse processes
82
Intertransversarii M. : Action
Laterally flex spine
83
Intertransversarii M. : Innervation
Suboccipital N. (posterior ramus 1st cervical spinal N.)
84
Rectus Capitis Posterior Major M. : Insertion
Lateral aspect inferior nuchal line
85
Rectus Capitis Posterior Major M. : Action
- Extend head | - Rotate the face toward
86
Rectus Capitis Posterior Major M. : Innervation
Suboccipital N. (posterior ramus 1st cervical spinal N.)
87
Rectus Capitis Posterior Minor M. : Insertion
Inferior to inferior nuchal line
88
Rectus Capitis Posterior Minor M. : Action
Extend head
89
Rectus Capitis Posterior Minor M. : Innervation
Suboccipital N. (posterior ramus 1st cervical spinal N.)
90
Obliquus Capitis Superior M. : Insertion
Between superior and inferior nuchal lines
91
Obliquus Capitis Superior M. : Action
- Extend head | - Laterally flex head
92
Obliquus Capitis Superior M. : Innervation
Suboccipital N. (posterior ramus 1st cervical spinal N.)
93
Obliquus Capitis Inferior M. : Insertion
Transverse process atlas (C1)
94
Obliquus Capitis Inferior M. : Action
Rotate the face toward
95
Obliquus Capitis Inferior M. : Innervation
Suboccipital N. (posterior ramus 1st cervical spinal N.)

MSK 1 (1 decks)

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