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MSK Exams > Muscles of the Back > Flashcards

Muscles of the Back Flashcards

1
Q

What are the main actions of the Erector spinae muscle?

A

Extends and laterally bends vertebral column and head

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2
Q

What are the main actions of the Interspinales (cervical, thoracic, lumbar) muscle?

A

Aid in extension of vertebral column

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3
Q

What are the main actions of the Intertransversarii (cervical, thoracic, lumbar) muscle?

A

Assist in lateral flexion of vertebral column

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4
Q

What are the main actions of the Latissimius dorsi muscle?

A

Extends, adducts, and medially rotates humerus

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5
Q

What are the main actions of the Levator scapulae muscle?

A

Elevates scapula medially, inferiorly rotates glenoid fossa

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6
Q

What are the main actions of the Multifidus muscle?

A

Stabilizes spine

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7
Q

What are the main actions of the Obliquus capitis inferior muscle?

A

Rotates atlas to turn face to same side

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8
Q

What are the main actions of the Obliquus capitis superior muscle?

A

Extends and bends head laterally

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9
Q

What are the main actions of the Rectus capitis posterior major muscle?

A

Extends and rotates head to same side

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10
Q

What are the main actions of the Rectus capitis posterior minor muscle?

A

Extends head

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11
Q

What are the main actions of the Rhomboid major muscle?

A

Fixes scapula to thoracic wall and retracts and rotates it to depress glenoid cavity

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12
Q

What are the main actions of the Rhomboid minor muscle?

A

Fixes scapula to thoracic wall and retracts and rotates it to depress glenoid cavity

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13
Q

What are the main actions of the Rotatores muscle?

A

Stabilizes, extends, and rotates spine

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14
Q

What are the main actions of the Semispinalis muscle?

A

Extends head, neck, and thorax and rotates them to opposite side

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15
Q

What are the main actions of the Serratus posterior inferior muscle?

A

Depresses ribs

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16
Q

What are the main actions of the Serratus posterior superior muscle?

A

Elevates ribs

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17
Q

What are the main actions of the Splenius capitis muscle?

A

Bilaterally: extends head Unilaterally: laterally bends (flexes) and rotates face to same side

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18
Q

What are the main actions of the Splenius carvicis muscle?

A

Bilaterally: extends neck Unilaterally: laterally bends (flexes) and rotates neck toward same side

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19
Q

What are the main actions of the Trapezius muscle?

A

Elevates, retracts, and rotates scapula; lower fibers depress scapula

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20
Q

What arteries supply the Erector spinae muscle?

A

Cervical portions: occipital, deep cervical, and vertebral arteries Thoracic portions: dorsal branches of posterior intercostal, subcostal, and lumbar arteries Sacral portions: dorsal branches of lateral sacral arteries

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21
Q

What arteries supply the Interspinales (cervical, thoracic, lumbar) muscle?

A

Cervical portions: occipital, deep cervical, and vertebral arteries Thoracic portions: dorsal branches of posterior intercostal arteries Lumbar portions: dorsal branches of lumbar arteries

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22
Q

What arteries supply the Intertransversarii (cervical, thoracic, lumbar) muscle?

A

Cervical portions: occipital, deep cervical, and vertebral arteries Thoracic portions: dorsal branches of posterior intercostal, subcostal, and lumbar arteries Lumbar portions: dorsal branches of lateral lumbar arteries

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23
Q

What arteries supply the Latissimus dorsi muscle?

A

Thoracodorsal artery, dorsal perforating branches of 9th, 10th, and 11th posterior intercostal, subcostal, and first three lumbar arteries

24
Q

What arteries supply the Levator scapulae muscle?

A

Dorsal scapular artery, transverse cervical artery, ascending cervical artery

25
Q

What arteries supply the Multifidus muscle?

A

Cervical portions: occipital, deep cervical, and vertebral arteries Thoracic portions: dorsal branches of posterior intercostal, subcostal, and lumbar arteries Sacral portions: dorsal branches of lateral sacral arteries

26
Q

What arteries supply the Obliquus capitis inferior muscle?

A

Vertebral artery, descending branch of occipital artery

27
Q

What arteries supply the Obliquus capitis superior muscle?

A

Vertebral artery, descending branch of occipital artery

28
Q

What arteries supply the Rectus capitis posterior major muscle?

A

Vertebral artery, descending branch of occipital artery

29
Q

What arteries supply the Rectus capitis posterior minor muscle?

A

Vertebral artery, descending branch of occipital artery

30
Q

What arteries supply the Rhomboid major muscle?

A

Dorsal scapular OR deep branch of transverse cervical artery, dorsal perforating branches of upper five or six posterior intercostal arteries

31
Q

What arteries supply the Rhomboid minor muscle?

A

Dorsal scapular OR deep branch of transverse cervical artery, dorsal perforating branches of upper five or six posterior intercostal arteries

32
Q

What arteries supply the Rotatores muscle?

A

Dorsal branches of segmental arteries

33
Q

What arteries supply the Semispinalis muscle?

A

Cervical portions: occipital, deep cervical, and vertebral arteries Thoracic portions: dorsal branches of posterior intercostal arteries

34
Q

What arteries supply the Serratus posterior inferior muscle?

A

Posterior intercostal arteries

35
Q

What arteries supply the Serratus posterior superior muscle?

A

Posterior intercostal arteries

36
Q

What arteries supply the Splenius capitis muscle?

A

Descending branch of occipital artery, deep cervical artery

37
Q

What arteries supply the Splenius cervicis muscle?

A

Descending branch of occipital artery, deep cervical artery

38
Q

What arteries supply the Trapezius muscle?

A

Transverse cervical artery, dorsal perforating branches of posterior intercostal arteries

39
Q

What nerve innervates Erector spine?

A

Posterior rami of each region

40
Q

What nerve innervates Interspinales (cervical, thoracic, lumbar)?

A

Posterior rami of spinal nerves

41
Q

What nerve innervates Intertransversarii (cervial, thoracic, lumbar)?

A

Posterior rami of spinal nerves

42
Q

What nerve innervates Latissimus dorsi?

A

Thoracodorsal nerve

43
Q

What nerve innervates Levator scapulae?

A

Anterior rami of C3–C4 and dorsal scapular nerve

44
Q

What nerve innervates Multifidus?

A

Posterior rami of each region

45
Q

What nerve innervates Obliquus capitis inferior?

A

Suboccipital nerve

46
Q

What nerve innervates Obliquus capitis superior?

A

Suboccipital nerve

47
Q

What nerve innervates Rectus capitis posterior major?

A

Suboccipital nerve

48
Q

What nerve innervates Rectus capitis posterior minor?

A

Suboccipital nerve

49
Q

What nerve innervates Rhomboid minor?

A

Dorsal scapular nerve

50
Q

What nerve innervates Rhomboid minor?

A

Dorsal scapular nerve

51
Q

What nerve innervates Rotatores?

A

Posterior rami of spinal nerves

52
Q

What nerve innervates Semispinalis?

A

Posterior rami of spinal nerves

53
Q

What nerve innervates Serratus posterior inferior?

A

Anterior rami of lower thoracic nerves

54
Q

What nerve innervates Serratus posterior superior?

A

Anterior rami of upper thoracic nerves

55
Q

What nerve innervates Splenius capitis?

A

Posterior rami of middle cervical nerves

56
Q

What nerve innervates Splenius cervicis?

A

Posterior rami of lower cervical nerves

57
Q

What nerve innervates Trapezius?

A

Accessory nerve (CN XI)

MSK Exams (13 decks)

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