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MSK Block 1 > Back Myology > Flashcards

Back Myology Flashcards

1
Q

Layer 1

A

Extrinsic

Trapezius Muscle
Latissimus Dorsi Muscle

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2
Q

Trapezius Muscle

A

Actions
Whole- Sup rotate glenoid cavity, retract scapula
Upper- Elevate scapula, extend neck, rotate face away
Lower- Depress scapula

Innervation: Accessory Cranial Nerve XI

Transverse cervical artery

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3
Q

Latissimus Dorsi Muscle

A

Actions: Extend, Adduct, and medially rotate humerus
Inferior rotate glenoid cavity

Innervation: Thoracodorsal Nerve

Thoracodorsal Artery

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4
Q

Layer 2

A

Extrinsic

Rhomboid Major
Rhomboid Minor
Levator Scapulae

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5
Q

Rhomboid Major

A

Action: Retract and Elevate Scapula, Inferior rotate glenoid cavity

Innervation: Dorsal Scapular Nerve

Dorsal Scapular Artery

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6
Q

Rhomboid Minor

A

Action: Retract and Elevate Scapula, Inferior rotate glenoid cavity

Innervation: Dorsal Scapular Nerve

Dorsal Scapular Artery

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7
Q

Levator Scapulae

A

Action: Elevate scapula, Inferior rotate glenoid cavity, Extend and Laterally flex neck

Innervation: Dorsal Scapular Nerve

Dorsal Scapular Artery

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8
Q

Layer 3

A

Extrinsic

Serratus Posterior Superior Muscle
Serratus Posterior Inferior Muscle

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9
Q

Serratus Posterior Superior Muscle

A

Action: Elevate Ribs, Mostly Proprioception

Innervation: Intercostal Nerve

Intercostal Artery

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10
Q

Serratus Posterior Inferior Muscle

A

Action: Depress Ribs, Mostly Porprioception

Innervation: Anterior Rami

Intercostal Artery

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11
Q

Layer 4

A

Intrinsic… all innervated by posterior rami

Splenius Capitus Muscle
Splenius Cervicus Muscle

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12
Q

Splenius Capitus Muscle

A

Action: Extend neck, Rotate face towards and laterally flex neck

Occipital Artery

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13
Q

Splenius Cervicis Muscle

A

Action: Extend neck, rotate face towards and laterally flex neck

Occipital Artery

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14
Q

Layer 5

A

Intrinsic… all innervation by posterior rami

Erector Spinae Group:
Iliocostalis Muscle (lateral)
Longissimus Muscle (intermediate)
Spinalis Muscle (medial)
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15
Q

Iliocostalis Muscle

A

Action: Erect posture, Extend vertebral column and head, Laterally flex vertebral column

3 Parts: Lumborum, Thoracis and Cervicis
Posterior intercostal and lumbar arteries

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16
Q

Longissimus Muscle

A

Action: Erect posture, Extend spine and head, laterally flex spine

3 parts: Thoracis, Cervicis and Capitis (rotates face towards)
Posterior intercostal arteries and occipital artery (capitis)

17
Q

Spinalis Muscle

A

Actions: Erect posture, Extend spine and head, Laterally flex spine

3 parts but hard to distinguish
Posterior intercostal arteries

18
Q

Layer 6

A

Intrinsic…innervation by posterior rami

Transversospinalis Group:
Semispinalis Muscle
Multifidus Muscle
Rotatores Longus Muscle
Rotatores Brevis Muscle
19
Q

Semispinalis Muscle

A

Actions:
Thoracis/Cervicis- Extend spine and rotate spine away
Capitis- Extend head and rotate head away

Posterior intercostal arteries (thoracis) and deep cervical arteries

20
Q

Multifidus Muscle

A

Actions: Extend Spine and rotate spine away

Posterior lumbar arteries

21
Q

Rotatores Longus

A

Actions: Extend spine, rotate spine away, mostly proprioception

Posterior intercostal arteries

22
Q

Rotatores Brevis

A

Actions: Extend spine and rotate spine away, mostly proprioception

Posterior intercostal arteries

23
Q

Interspinalis Muscle

A

Action: Extend spine

Vertebral, occipital and posterior intercostal arteries

24
Q

Intertransversarii Muscle

A

Action: Laterally flex spine

Deep cervical, vertebral and posterior intercostal arteries

25
Q

Suboccipital Muscles

A

Rectus Capitis Posterior Major Muscle
Rectus Capitis Posterior Minor Muscle
Obliquus Capitis Inferior Muscle
Obliquus Capitis Superior Muscle

26
Q

Rectus Capitis Posterior Major Muscle

A

Actions: Extend Head, rotate face toward

Innervation: Suboccipital nerve

Vertebral and occipital arteries

27
Q

Rectus Capitis Posterior Minor Muscle

A

Action: Extend Head

Innervation: Suboccipital nerve

Vertebral and occipital arteries

28
Q

Obliquus Capitis Inferior Muscle

A

Action: rotate face toward

Innervation: Suboccipital nerve

Vertebral and occipital arteries
*not actually attached to Head ( C2 to C1)

29
Q

Obliquus Capitis Superior Muscle

A

Actions: Extend and Laterally flex head

Innervation: Suboccipital nerve

Vertebral and occipital arteries

MSK Block 1 (8 decks)

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