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MSK > Back Myology > Flashcards

Back Myology Flashcards

1
Q

Trapezius

A 
Layer 1
O: Upper spine, occipital B.
I: Scapula
A: Whole muscle-retraction of scapula
Upper part-elevation of scapula
Lower part-depression of scapula
Bilaterally: extension of neck
Unilaterally: rotates face away, laterally flexes neck
N: Spinal Accessory N. C3-C4
Blood supply: Transverse Cervical A.
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2
Q

Latissimus Dorsi M.

A 
Layer 1
O: Lower spine
I: front of humerus
A: Medial rotation, ADduction, and extension of arm
N: Thoracodorsal N. C6-C8
Blood supply: Thoracodorsal A.
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3
Q

Rhomboid Major M.

A 
Layer 2
O: Thoracic spine
I: Scapula (below spine)
A: Retract and elevate scapula
N: Dorsal Scapular N. C5
Blood supply: Dorsal Scapular A.
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4
Q

Rhomboid Minor M.

A 
Layer 2
O: Spine cervical and thoracic
I: Scapula at spine
A: Retract and elevate scapula
N: Dorsal Scapular N. C5
Blood supply: Dorsal scapular A.
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5
Q

Levator Scapulae M.

A 
Layer 2
O: Cervical spine
I: Scapula superior spine
A: Elevates scapula, extend and laterally flex neck
N: Dorsal Scapular N. C5
Blood supply: Dorsal scapular A.
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6
Q

Serratus posterior superior M.

A 
Layer 3
O: Cervical and thoracic spine
I: Superior surface of high ribs
A: Elevate ribs w/ forced inspiration
N: Intercostal N.
Blood supply: Intercostal As.
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7
Q

Serratus posterior inferior M.

A 
Layer 3
O: Thoracic and lumbar spine
I: Inferior surface of low ribs
A: Depresses ribs with forced expiration
N: Anterior rami T9-T12
Blood supply: Intercostal As.
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8
Q

Splenius Capitis M.

A 
Layer 4: Intrinsic
O: Cervical vertebrae
I: occipital and temporal Bs.
A: Bilaterally-extend neck
Unilaterally-laterally flex neck and rotate face toward
N: Posterior rami C3-C5
Blood supply: Muscular branches of aorta
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9
Q

Splenius Cervicis M.

A 
Layer 4: Intrinsic
O: Thoracic vertebrae
I: Cervical vertebrae
A: Bilaterally-extend neck
Unilaterally-laterally flex neck and rotate face toward
N: Posterior rami C5-C7
Blood supply: muscular branches of aorta
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10
Q

Erector Spinae Ms.

A 
Layer 5
Iliocostalis
Longissimus
Spinalis
A: Bilaterally: Maintain posture and extend spine and head
Unilaterally: Flex vertebral column
N: Posterior rami
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11
Q

Iliocostalis M.

A

Layer 5
Most lateral
Lumborum, Thoracis, and Cervicis

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12
Q

Longissimus M.

A

Layer 5
Middle (not medial or lateral)
Thoracis, Cervicis, and Capitis

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13
Q

Spinalis M.

A

Layer 5
Medial
Thoracis, Cervicis, and Capitis

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14
Q

Rotatores Brevis M.

A

Layer 6
Extending to adjacent spinal segment
A: Extends and rotates spine away
N: posterior rami

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15
Q

Rotatores Longus M.

A

Layer 6
Extending 2 spinal segments superior
A: Extends and rotates spine away
N: Posterior rami

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16
Q

Multifidus M.

A

Layer 6
Extending 3 or 4 spinal segments
A: Extend and rotate spine away
N: Posterior rami

17
Q

Semispinalis Ms.

A

Layer 6
Extending 5 or more spinal segments
Thoracis, Cervicis, and Capitis

18
Q

Semispinalis Thoracis M.

A

Layer 6
O: Thoracic vertebrae (transverse processes)
I: Cervical and thoracic vertebrae (spinous processes)
A: Extend and rotate spine away
N: Posterior rami

19
Q

Semispinalis Cervicis M.

A

Layer 6
O: Transverse processes of thoracic vertebrae
I: Spinous processes of cervical vertebrae
A: extend and rotate spine away
N: Posterior rami

20
Q

Semispinalis Capitis M.

A 
Layer 6
O: Transverse processes of cervical and thoracic vertebrae
I: Occipital B.
A: Extend head, rotate face away
N: Posterior rami
21
Q

Interspinalis M.

A 
Deep back muscle
O: Spinous process
I: Adjacent spinous process
A: Extend spine
N: Posterior rami
22
Q

Intratraversarii M.

A 
Deep back muscle
O: spinous process
I: Adjacent transverse process
A: Laterally flex spine
N: Posterior portion=posterior rami, anterior portion=anterior rami
23
Q

Levator Costarum Longus

A 
Deep back muscle
O: Transverse process C7-T11
I: 2nd rib inferior to origin
A: Elevate ribs
N: Posterior rami
24
Q

Levator Costarum Brevis M.

A 
Deep back muscle
O: Transverse process C7-T11
I: Adjacent rib inferior to origin
A: Elevate ribs
N: Posterior rami
25
Q

Rectus capitis posterior major M.

A 
Medial border of Suboccipital triangle
O: Spinous process C2
I: Lateral portion inferior nuchal line
A: Extend head, rotate face toward
N: Subbocipital N.
26
Q

Rectus capitis posterior minor M.

A

O: posterior tubercle C1
I: below inferior nuchal line
A: Extend head
N: Subbocipital N.

27
Q

Obliquus capitis inferior M.

A 
Inferior border Suboccipital triangle
Does not actually come in contact with skull
O: spinous process C2
I: transverse process C1
A: rotate face toward
N: Suboccipital N.
28
Q

Obliquus capitis superior M.

A 
Lateral border of Suboccipital triangle
O: Transverse process C1
I: Between superior and inferior nuchal lines
A: Extend and laterally flex head
N: Subbocipital N.

MSK (16 decks)

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