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Gross Anatomy > Muscles (Back, Upper Limb) > Flashcards

Muscles (Back, Upper Limb) Flashcards

1
Q

Origin of Trapezius

A

Superior nuchal line, external occipital protuberance, ligamentum nuchae, and spinous processes of C7 through T12

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2
Q

Insertion of Trapezius

A

Lateral 3rd of clavicle, acromion and spine of scapula

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3
Q

Innervation of Trapezius

A

Suptrapezial nerve plexus, Motor: Accessory n. (CN XI) and Proprioception: Cervical nn. (C3 and C4)

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4
Q

Actions of Trapezius

A

Elevates, retracts and rotates scapula

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5
Q

Blood Supply to Trapezius

A

Branch(es) of the transverse cervical artery

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6
Q

Origin of Latissimus Dorsi

A

Spinous processes of T6 through T12, Thoracolumbar Fascia, iliac crest, and ribs X to XII

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7
Q

Insertion of Latissimus Dorsi

A

Floor of the intertubercular groove of the humerus

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8
Q

Actions of Latissimus Dorsi

A

Extends, adducts and medially rotates the humerus; raise body during climbing

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9
Q

Innervation of Latissimus Dorsi

A

Thoracodorsal n. (C6,C7,C8)

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10
Q

Blood Supply to Latissimus Dorsi

A

Thoracodorsal artery from the subscapular a.

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11
Q

Origin of Levator Scapulae

A

Posterior tubercles of the transverse processes of C1 through C4

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12
Q

Insertion of Levator Scapulae

A

Upper portion of the medial border of the scapula

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13
Q

Innervation of Levator Scapulae

A

Cervical nerves C3 and C4 and Dorsal Scapular n. (C5)

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14
Q

Actions of Levator Scapulae

A

Elevates the scapula and tilts the glenoid cavity inferiorly by rotating the scapula

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15
Q

Blood Supply to Levator Scapulae

A

Dorsal scapular a.

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16
Q

Origin of Rhomboideus Major

A

Spinous processes of T2-T5

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17
Q

Origin of Rhomboideus Minor

A

Spinous processes of C7-T1 and ligamentum nuchae

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18
Q

Insertions of Rhomboideus Major and Minor

A

Medial border of the scapula from above scapular spine to the inferior angle. Minor is superior to the major.

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19
Q

Innervation of Rhomboideus Major and Minor

A

Dorsal Scapular n. (C4, C5)

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20
Q

Actions of Rhomboideus Major and Minor

A

Retracts scapula and elevates it. Rotation depresses the glenoid cavity. Fixes scapula to thoracic wall.

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21
Q

Blood supply to Rhomboideus Major and Minor

A

Dorsal scapular a.

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22
Q

Three columns of Erector Spinae

A

Lateral to medial: Iliocostalis, Logissimus, Spinalis

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23
Q

Origin of Erector Spinae group

A

Sacrum and spinous processes of lumbar and lower thoracic vertebrae

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24
Q

Insertion of Iliocostalis

A

The angles of the ribs

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25
Q

Insertion of Longissimus

A

The transverse processes of vertebrae at all levels up to the base of the skull

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26
Q

The Spinalis fibers…?

A

interconnect the spinous processes of adjacent vertebrae

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27
Q

Innervation of Erector Spinae group

A

Innervated segmentally by the Dorsal Primary Rami of spinal nerves

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28
Q

The Dorsal Scapular muscles

A

Supraspinatus, Intraspinatus, Teres Major and Teres Minor

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29
Q

Origin of Subscapularis

A

Subscapular fossa

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30
Q

Insertion of Subscapularis

A

Lesser tubercle of the humerus

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31
Q

Innervation of Subscapularis

A

Upper and Lower Subscapular nn.

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32
Q

Action of Subscapularis

A

Medial rotation of the arm

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33
Q

Origin of Supraspinatus

A

Supraspinous fossa

34
Q

Insertion of Supraspinatus

A

Greater tubercle of the humerus (superior facet)

35
Q

Innervation of Supraspinatus

A

Suprascapular n. (C5, C6)

36
Q

Action of Supraspinatus

A

Abduction (0-15 degrees)

37
Q

Origin of Infraspinatus

A

Infraspinous fossa

38
Q

Insertion of Infraspinatus

A

Greater tubercle of the humerus (middle facet)

39
Q

Innervation of Infraspinatus

A

Suprascapular n. (C5,C6)

40
Q

Action of Infraspinatus

A

Lateral Rotation of the arm

41
Q

Origin of Teres Minor

A

Upper lateral border of the scapula

42
Q

Insertion of Teres Minor

A

Greater tubercle of the humerus (inferior facet)

43
Q

Innervation of Teres Minor

A

Axillary n. (C5, C6)

44
Q

Action of Teres Minor

A

Lateral rotation of the arm

45
Q

Origin of Teres Major

A

Lower lateral border of the scapula

46
Q

Insertion of Teres Major

A

Crest of the lesser tubercle of the humerus

47
Q

Innervation of Teres Major

A

Lower subscapular n.

48
Q

Action of Teres Major

A

Medial rotation, adduction and extension of the arm

49
Q

Origin of Deltoid

A

Lateral margin of the scapular spine, acromion and clavicle

50
Q

Insertion of Deltoid

A

Deltoid tuberosity of the humerus

51
Q

Innervation of Deltoid

A

Axillary n. (C5, C6)

52
Q

Action of Deltoid

A

Adduction (15-100 degrees)

Anterior fibers: Medial rotation and flexion of the arm

Posterior fibers: Lateral rotation and extension of the arm

53
Q

Origin of Pectoralis Major

A

Clavicle, sternum and ribs 1-6

54
Q

Insertion of Pectoralis Major

A

Crest of the greater tubercle of the humerus

55
Q

Innervation of Pectoralis Major

A

Medial and lateral pectoral nn.

56
Q

Action of Pectoralis Major

A

Medial rotation, adduction and flexion of the arm

57
Q

Origin of Pectoralis Minor

A

Ribs 3-5

58
Q

Insertion of Pectoralis Minor

A

Coracoid process of the scapula

59
Q

Innervation of Pectoralis Minor

A

Medial pectoral n.

60
Q

Action of Pectoralis Minor

A

Protraction of the scapula

61
Q

Origin of Serratus Anterior

A

Ribs 1-9

62
Q

Insertion of Serratus Anterior

A

Medial border of the scapula, costal surface

63
Q

Innervation of Serratus Anterior

A

Long thoracic n. (C5-C7)

64
Q

Action of Serratus Anterior

A

Protraction and superior rotation of the lateral angle of the scapula; holds scapula against the dorsal trunk

65
Q

Origin of Subclavius

A

1st Rib

66
Q

Insertion of Subclavius

A

Groove on the middle 1/3 of the clavicle

67
Q

Innervation of Subclavius

A

N. to the subclavius

68
Q

Action of Subclavius

A

Pulls tip of the shoulder down, pulls clavicle medially to stabilize the sternoclavicular joint, serves to cushion neurovascular structures deep to the clavicle

69
Q

Elevation of scapula

A

Upper trapezius, levator scapulae

70
Q

Protraction of scapula

A

Serratus anterior, pectoralis minor

71
Q

Superior rotation of lateral angle of scapula

A

Upper and lower trapezius, serratus anterior

72
Q

Depression of scapula

A

Lower trapezius, Lower serratus anterior, gravity

73
Q

Retraction of scapula

A

Rhomboid major, rhomboid minor, middle trapezius

74
Q

Inferior rotation of lateral angle of scapula

A

Levator scapulae, rhomboid minor, rhomboid major, gravity

75
Q

Flexion of arm

A

Pec major, anterior deltoid, biceps brachii, coracobrachialis

76
Q

Abduction of arm

A

Supraspinatus, deltoid

77
Q

Medial rotation of arm

A

Subscapularis, teres major, latissimus dorsi, anterior deltoid, pectoralis major

78
Q

Extension of arm

A

Latissimus dorsi, teres major, posterior deltoid, long head of triceps brachii

79
Q

Adduction of arm

A

Anterior and posterior deltoid, latissimus dorsi, teres major, pectoralis major

80
Q

Lateral rotation of arm

A

Infraspinatus, teres minor, posterior deltoid

Gross Anatomy (6 decks)

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