Superficial Back and Shoulders Flashcards Preview

Anatomy > Superficial Back and Shoulders > Flashcards

Flashcards in Superficial Back and Shoulders Deck (92):
1

Latissimus dorsi nerve

Thoracodorsal (C6-C8) nerve

2

Latissimus dorsi origin (4)

T6-12, thoracolumbar fashia, iliac crest, lower ribs

3

Latissimus dorsi insertion

Intertubercular groove of humerus

4

Latissimus dorsi action (3)

Adducts, extends and medially rotates humerus

5

Trapezius nerve

Spinal accessory XI

6

Trapezius origin (4)

External occipital protruberance, superior nuchal line, ligamentum nuchae, spinous processes of C7-T12

7

Trapezius insertion (3)

Acromion, spine of scapula, lateral third of clavicle

8

Trapezius action (4)

Adducts and rotates scapula, upper part elevates scapula, lower part depresses scapula

9

Levator scapulae nerve

Nerve to levator scapulae

10

Levator scapulae origin

Transverse processes of C1-C4

11

Levator scapulae insertion

Superior medial border of scapula

12

Levator scapulae action (2)

Elevates scapula and tilts glenoid inferiorly

13

Rhomboid min/maj nerve

dorsal scapular nerve

14

Rhomboid minor origin

Spinous processes of C7-T1

15

Rhomboid min/maj insertion

Medial border of scapula

16

Rhomboid min/maj action

Retract (adducts) scapula

17

Rhomboid maj origin

Spinous processes of T2-T5

18

Serratus anterior nerve

Long thoracic nerve, originating at C5,6,7

19

Serratus anterior origin

Ribs 1-8

20

Serratus anterior insertion

Medial border of scapula

21

Serratus anterior action

Holds scapula against thorax

22

Deltoid nerve

Axillary nerve

23

Deltoid origin (3)

Lateral third of clavicle, acromion, and spine of scapula

24

Deltoid insertion

Deltoid tuberosity of humerus

25

Deltoid Action (3)

Anterior: Flexion and medial rotation of humerus. Middle: Abduction of humerus
Posterior: Extension and lateral rotation of humerus

26

Supraspinatus and Infraspinatus nerve

Suprascapular nerve

27

Supraspinatus origin

Supraspinous fossa of scapula

28

Supraspinatus/Infraspinatus insertion

Greater tubercle of humerus

29

Supraspinatus action

Initiates abduction of humerus

30

Infraspinatus origin

Infraspinous fossa of scapula

31

Infraspinatus action

Lateral rotation of humerus

32

Subscapularis origin

Subscapular fossa on anterior surface of scapula

33

Subscapularis insertion

Lesser tubercle of humerus

34

Subscapularis action

Medial rotation and adduction of humerus

35

Teres major nerve

Lower subscapular nerve

36

Teres major origin

Dorsal surface of inferior angle of scapula

37

Teres major action (2)

Adduction and medial rotation of humerus

38

Teres major insertion

Medial lip of intertubcular groove

39

Teres minor nerve

Axillary nerve

40

Teres minor origin

Superior portion of lateral border of scapula

41

Teres minor insertion

Greater tubercle of humerus

42

Teres minor action

Lateral rotation of humerus

43

3 Margins of Scapula

Medial, lateral, superior

44

3 Angles of Scapula

Superior, inferior, lateral (glenoid fossa)

45

Scapula Function

Stabilize upper extremity through muscle attachments

46

4 Fossas of Scapula

Supraspinatus, infraspinatus, glenoid, and subscapular

47

Scapular notch

Little valley on superior margin of scapula, adjacent to coracoid process

48

Subscapular fossa

Main area of anterior side of scapula

49

Head of humerus

Top area of humerus until surgical neck

50

Greater tubercle

Larger, lateral protrusion on head of humerus

51

Lesser tubercle

Smaller, medial protrusion on head of humerus

52

Anatomical neck of humerus

Just above tubercles of humerus

53

Surgical neck of humerus

Just below tubercles of humerus

54

Intertubercular groove

Groove between tubercles on humerus

55

Deltoid tuberosity

Little bump about halfway down lateral edge of humerus

56

6 Parts of Acromioclavicular Joint

Articular capsule, Acromioclavicular ligaments (superior and inferior), Coracoclavicular ligaments (conoid and trapezoid), articular disk

57

Articular capsule

Envelope surrounding a joint, including acromioclavicular joint

58

Conoid coracoclavicular ligament

More medial ligament attaching coracoid process and clavicle

59

Trapezoid coracoclavicular ligament

More lateral ligament attaching coracoid process and clavicle

60

Articular disk

Thin piece of fibrocartilage that separates synovial cavities in joints

61

4 Parts of Glenhumeral Joint

Capsular (glenohumeral) ligament, Transverse ligament of the humerus, Coracoacromial Ligament, Glenoid labrum

62

Glenohumeral ligaments

Run anteriorly to attach scapula and humerus

63

Transverse ligament of the humerus

Crosses over intertubercular groove to turn it into a canal

64

Tendon of long head of biceps

Inserts in intertubercular groove right under transverse ligament of the humerus to become part of the capsular ligament of the glenohumeral joint

65

Glenoid labrum

Cartilaginous ring extending around glenoid cavity, deepening the socket

66

Rotator Cuff Muscles

Supraspinatus, Infraspinatus, Teres minor, Subscapularis

67

Boundaries of Axillary Artery

First rib-inferior border of teres major

68

Suprascapular artery

Comes off thyrocervical trunk off subclavian a. and goes over transverse scapular ligament to supply blood to supraspinatus/infraspinatus

69

Deep branch of transverse scapular artery (dorsal scapular artery)

Comes off thyrocervical trunk just above suprascapular artery and goes over shoulder, under levator scapulae and follows medial margin of scapula to supply blood to trapezius, levator scapulae, and rhomboid major and minor

70

Subscapular artery

Comes off last 3rd of axillary artery, supplies subscapularis, and breaks into scapular circumflex artery and thoracodorsal artery

71

Scapular circumflex artery

Comes off subscapular artery, hugs lateral margin of scapula and supplies subscapularis, teres minor, and teres major

72

Thoracodorsal artery

Comes off subscapular artery and runs to latissimus dorsi along w/ thoracodorsal nerve

73

Anterior humeral circumflex artery

Comes off axillary artery (before posterior humeral circumflex artery), wraps around humerus, and supplies latissimus dorsi (?)

74

Posterior humeral circumflex artery

Comes off axillary artery (after anterior humeral circumflex artery), goes through quadrangular space and breaks into ascending and descending branches and it wraps around humerus, and helps feed deltoid and teres minor

75

Scapular Arterial Anastomosis (2)

Proximal component: suprascapular a., deep branch of transverse cervical a., and distal component: subscapular a.

76

Cutaneous Innervation of Shoulder/Back (3)

Supraclavicular n., axillary n., and posterior primary rami

77

Suprascapular nerve

Travels under superior transverse scapular ligament and innervates supraspinatus and infraspinatus

78

Dorsal scapular nerve

Branch of transverse cervical nerve, innervates leviator scapulae, rhomboid minor and major

79

Axillary nerve

Runs through quadrangular space and innervates teres minor and deltoid

80

Upper subscapular nerves

Innervate subscapularis

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Lower subscapular nerves

Innervate subscapularis and teres major

82

Long thoracic nerve

From C5-7, travels down posterior wall to supply serratus anterior

83

Boundaries of quadrangular space

Lat: Humerus. Med: Long head of triceps brachii. Sup: Teres minor. Inf: Teres major

84

Contents of quadrangular space

Axillary n. and posterior humeral circumflex artery

85

Boundaries of triangular interval

Med: Long head of triceps brachii. Lat: Humerus. Sup: Teres major

86

Contents of triangular interval

Radial nerve and profunda brachii artery

87

Boundaries of triangular space

Lat: Long head of triceps brachii. Sup: Teres minor. Inf: Teres major

88

Contents of triangular space

Branch of scapular circumflex artery

89

Shoulder Dislocation (2)

Anterior most common, can have subluxation (partial dislocation)

90

Bursitis

Inflammation of bursa, can calcify

91

2 shoulder nerve injuries

Spinal accessory nerve - shoulder depressed and can't shrug bc trapezius disabled, or get arm above 90 deg
Long thoracic nerve - lose serratus anterior so get winged scapula

92

Supraspinatus muscle injury

Can't initiate raising of the arm