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Sum 2014 - Anat Exam 1 > Exam 1 - Back - Muscles > Flashcards

Exam 1 - Back - Muscles Flashcards

1
Q

What innervates the Trapezius?

A

motor: spinal accessory (XI), proprioception: C3-C4

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2
Q

What is the function of the Trapezius?

A

elevates and depresses the scapula (depending on which part of the muscle contracts); rotates the scapula superiorly; retracts scapula

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3
Q

What are the origins of the Trapezius?

A

medial third of the superior nuchal line, external occipital protuberance, ligamentum nuchae, spinous processes of vertebrae C7-T12

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4
Q

What are the insertions of the Trapezius?

A

lateral third of the clavicle, medial side of the acromion and the upper crest of the scapular spine, tubercle of the scapular spine

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5
Q

What innervates the Latissimus dorsi?

A

thoracodorsal nerve (C7,8) from the posterior cord of the brachial plexus

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6
Q

What is the function of the Latissimus dorsi?

A

extends the arm and rotates the arm medially

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7
Q

What are the origins of the Latissimus dorsi?

A

vertebral spines from T7 to the sacrum, posterior third of the iliac crest, lower 3 or 4 ribs, sometimes from the inferior angle of the scapula

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8
Q

What is the insertion of the Latissimus dorsi?

A

floor of the intertubercular groove

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9
Q

What innervates the Levator Scapulae?

A

dorsal scapular nerve (C5); the upper part of the muscle receives branches of C3 & C4

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10
Q

What is the function of the Levator Scapulae?

A

elevates the scapula

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11
Q

What is the origin of the Levator Scapulae?

A

transverse processes of C1-C4 vertebrae

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12
Q

What is the insertion of the Levator Scapulae?

A

medial border of the scapula from the superior angle to the spine

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13
Q

What innervates the Rhomboid major?

A

dorsal scapular nerve (C5)

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14
Q

What is the function of the Rhomboid major?

A

retracts, elevates and rotates the scapula inferiorly

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15
Q

What is the origin of the Rhomboid major?

A

spines of vertebrae T2-T5

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16
Q

What is the insertion of the Rhomboid major?

A

medial border of the scapula inferior to the spine of the scapula

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17
Q

What are the 3 Erector Spinae Muscles?

A

Iliocostalis, Longissimus, Spinalis

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18
Q

What innervates the Iliocostalis?

A

dorsal primary rami of spinal nerves C4-S5

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19
Q

What are the functions of the Iliocostalis?

A

extends and laterally bends the trunk and neck

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20
Q

What are the origins of the Iliocostalis?

A

iliac crest and sacrum

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21
Q

What are the insertions of the Iliocostalis?

A

angles of the ribs

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22
Q

What innervates the Longissimus?

A

dorsal primary rami of spinal nerves C1-S1

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23
Q

What are the functions of the Longissimus?

A

extends and laterally bends the trunk, neck and head

24
Q

What are the origins of the Longissimus?

A

transverse process at inferior vertebral levels

25
Q

What are the insertions of the Longissimus?

A

transverse process at superior vertebral levels and mastoid process

26
Q

What innervates the Spinalis?

A

dorsal primary rami of spinal nerves C2-L3

27
Q

What are the functions of the Spinalis?

A

extends and laterally bends trunk and neck

28
Q

What are the origins of the Spinalis?

A

spinous processes at inferior vertebral levels

29
Q

What are the insertions of the Spinalis?

A

spinous processes at superior vertebral levels and base of the skull

30
Q

What innervates the Serratus Posterior Inferior?

A

branches of the ventral primary rami of spinal nerves T9-T12

31
Q

What are the functions of the Serratus Posterior Inferior?

A

pulls down lower ribs

32
Q

What are the origins of the Serratus Posterior Inferior?

A

thoracolumbar fascia, spines of vertebrae T11-T12 and L1-L2

33
Q

What are the insertions of the Serratus Posterior Inferior?

A

ribs 9-12, lateral to the angles

34
Q

What innervates the Serratus Posterior Superior?

A

branches of the ventral primary rami of spinal nerves T1-T4

35
Q

What is the function of the Serratus Posterior Superior?

A

elevates the upper ribs

36
Q

What are the origins of the Serratus Posterior Superior?

A

ligamentum nuchae, spines of vertebrae C7 and T1-T3

37
Q

What are the insertions of the Serratus Posterior Superior?

A

ribs 1-4, lateral to the angles

38
Q

What innervates the Splenius?

A

dorsal primary rami of spinal nerves C2-6

39
Q

What are the functions of the Splenius?

A

extends and laterally bends neck and head; rotates head to same side

40
Q

What are the origins of the Splenius?

A

ligamentum nuchae and spines C7-T6

41
Q

What are the insertions of the Splenius?

A

capitis: mastoid process & superior nuchal line laterally; cervicis: posterior tubercles of C1-3

42
Q

What supplies blood to the Trapezius?

A

transverse cervical a.

43
Q

What supplies blood to the Latissimus dorsi?

A

thoracodorsal a.

44
Q

What supplies blood to the Levator scapulae?

A

dorsal scapular a.

45
Q

What supplies blood to the Rhomboid major?

A

Dorsal scapular artery

46
Q

What are the origins of Rhomboid minor?

A

inferior end of the ligamentum nuchae, spines of vertebrae C7 and T1

47
Q

What are the insertions of Rhomboid minor?

A

medial border of the scapula at the root of the spine of the scapula

48
Q

What are the functions of Rhomboid minor?

A

retracts, elevates and rotates the scapula inferiorly

49
Q

What innervates Rhomboid minor?

A

dorsal scapular nerve (C5)

50
Q

What supplies blood to Rhomboid minor?

A

dorsal scapular a

51
Q

What supplies blood to Iliocostalis?

A

supplied segmentally by: deep cervical a., posterior intercostal aa., subcostal aa., lumbar aa.

52
Q

What supplies blood to Longissimus?

A

supplied segmentally by: deep cervical a., posterior intercostal aa., subcostal aa., lumbar aa.

53
Q

What supplies blood to Spinalis?

A

supplied segmentally by: deep cervical a., posterior intercostal aa., subcostal aa., lumbar aa.

54
Q

What supplies blood to Serratus Posterior Inferior?

A

lowest posterior intercostal a., subcostal a., first two lumbar aa.

55
Q

What supplies blood to Serratus Posterior Superior?

A

posterior intercostal aa. 1-4

56
Q

What supplies blood to Splenius?

A

supplied segmentally by: deep cervical a., posterior intercostal aa.

Sum 2014 - Anat Exam 1 (14 decks)

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