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Anatomy Of The Upper Extremity > Muscles Of The Shoulder Girdle > Flashcards

Muscles Of The Shoulder Girdle Flashcards

Learn the attachments, actions, and innervation of the muscles of the shoulder girdle

1
Q

Pec minor attachments

A

Superior anterior aspects of ribs 3-5

Medial superior coracoid process

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2
Q

Pec minor actions

A 
Depression
Protraction
Downward rotation
Stabilizes scap
Inspiration
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3
Q

Pec minor innervation

A

C8-T1

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4
Q

Pec major functions

A

Clavicular
- flexion of GH

Sternocostal
- extension of GH from high flexion

Horizontal adduction
Medial rotation
Depress shoulder girdle

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5
Q

Pec major attachments

A

Border of the sternum at clavicular notch to distal body
Inferior clavicle
Ribs 1-6 and costal cartilage
Aponeurosis of external oblique

Lateral lip of bicipital groove

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6
Q

Pec major innervation

A

C5-T1

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7
Q

Subclavius function

A

Depression of clavicle
Stabilize SC
Protects clavicle and first rib

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8
Q

Subclavius attachments

A

Groove for subclavius

Superior aspect of first rib and costal cartilage

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9
Q

Subclavian innervation

A

Nerve to subclavius

C5-6

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10
Q

Serratus anterior functions

A 
Protraction
Upward rotation 
Stabilizes scap 
Elevation 
Depression

Forms medial wall of axilla

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11
Q

Serratus anterior attachments

A

Superior external surface of ribs 1-8

Anterior aspects of medial border of the scap

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12
Q

Serratus anterior innervation

A

Long thoracic nerve

C5-7

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13
Q

Trapezius functions

A 
Upper fibres: scapular
- upward rotation
- elevation
Upper fibres C-spine:
- side flexion
- rotation
- extension

Middle fibres:
- retraction

Lower fibres:

  • downward rotation
  • depression
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14
Q

Trapezius attachments

A

Upper fibres origins:

  • External occipital protuberance
  • nuchal ligament
  • mid 1/3 nuchal line
  • SP of C7

Middle fibres origin:
- SPs and supraspinous ligaments of T1-5

Lower fibres origin:
- SPs and supraspinous ligaments of T6-12

Insertion:

  • posterior lateral 1/3 of clavicle
  • anteromedial acromion process
  • superior lip of spine of scap
  • inferior lip of spine of scap
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15
Q

Trapezius innervation

A

Accessory nerve (C XI)

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16
Q

Latissimus dorsi fx

A

Scapula

  • depression
  • downward rotation

GH

  • adduction
  • extension
  • internal rotation

Anterior rotation of pelvis

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17
Q

Latissimus dorsi attachments

A

Origins

  • SPs of T7-L5
  • Interspinous ligs of T7-L5
  • thoracolumbar fascia
  • posterior aspect ribs 9-12
  • post 1/3 external lip of iliac crest

Insertions

  • inferior angle of scapula
  • medial lip of bicipital groove
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18
Q

Lat dorsi innervation

A

Thoracodorsal nerve C6-8

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19
Q

Levator scapula fx

A

Scapula

  • elevation
  • downward rotation

C-spine

  • lateral flexion
  • rotation
  • extension
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20
Q

Levator scap attachments

A

posterior tubercles of transverse processes of c1-4

  • superior angle of scap
  • sup aspect of medial border of scap
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21
Q

Levator scap innervation

A

Dorsal scapular nerve C4/5

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22
Q

Rhomboid major fx

A
  • Scapular retraction
  • elevation
  • downward rotation
23
Q

Rhomboid major attachments

A

Origins
-SPs and supraspinous ligs of T2-5

Insertion
- medial border of scap, root of spine to inferior angle

24
Q

Rhomboid major innervation

A

Dorsal scapular nerve C4/5

25
Q

Rhomboid Minor fx

A
  • Scapular elevation
  • retraction
  • downward rotation
26
Q

Rhomboid minor attachments

A
  • Lower ligamentum nuchae
  • SPs C7/T1
  • medial border at foot of spine of scap
27
Q

Rhomboid minor innervation

A

Dorsal scapular nerve C4/5

28
Q

Deltoid fx

A

GH

  • abduction
  • extension
  • external rotation
  • flexion
  • internal rotation
29
Q

Deltoid attachments

A

Origins

  • anterior border of lateral third of clavicle
  • lateral aspect of acromion
  • inf lip of spine of scapula

Insertion
- deltoid tuberosity

30
Q

Deltoid innervation

A

Axillary nerve C5/6

31
Q

Supraspinatus fx

A 
GH abduction (0-30 degrees)
GH stabilization
32
Q

Supraspinatus attachments

A

Supraspinous fossa and deep fascia

Superior aspect of greater tubercle

33
Q

Suprapsinatus innervation

A

Suprascapular nerve C4-6

34
Q

Infraspinatus fx

A
  • External rotation
  • adduction
  • extension
  • GH stabilization
35
Q

Infraspinatus attachments

A
  • medial 2/3 of infraspinous fossa
  • deep fascia
  • posterior middle aspect of greater tubercle
  • deep fascia
36
Q

Infrapinatus innervation

A

Suprascapular nerve C4-6

37
Q

Subscapularis fx

A
  • internal rotation
  • adduction
  • GH stabilization
38
Q

Subscapularis attachments

A
  • medial 2/3 of subscapular fossa

- anterior aspect lesser tubercle of humerus

39
Q

Subscapularis innervation

A

Upper and lower subscapular nerve C5-7

40
Q

Teres minor fx

A
  • External rotation
  • extension
  • adduction
  • GH stabilization
41
Q

Teres minor attachments

A
  • posterior aspect of superior 2/3 of lateral border of scap

- posterior inferior aspect of greater tubercle

42
Q

Teres minor innervation

A

Axillary nerve C5/6

43
Q

Teres major fx

A

Lats little helper

  • extension
  • internal rotation
  • adduction
  • forms posterior wall of axilla
44
Q

Teres major attachments

A
  • inferior posterior third of lateral border of scap

- anterior crest of lesser tubercle of humerus

45
Q

Teres major innervation

A

Lower subscapular C5-7

46
Q

Triceps brachii fx

A

GH

  • extension
  • adduction

Elbow
- extension

47
Q

Triceps brachii attachments

A
  • Medial head: inferior medial to radial groove
  • lateral head: superior lateral to radial groove
  • long head: infraglenoid tubercle
  • posterior aspect of olecranon process
48
Q

Triceps brachii innervation

A

Radial nerve C6-T1

49
Q

Coracobrachialis fx

A
  • GH flexion

- Adduction

50
Q

Coracobrachialis attachments

A
  • apex of coracoid process of scap

- medial surface of mid humeral shaft (opposite from deltoid tuberosity)

51
Q

Coracobrachialis innervation

A

Musculocutaneous nerve C5-7

52
Q

Biceps brachii fx

A
  • gh flexion
  • elbow flexion
  • supination
53
Q

Biceps brachii attachments

A

Long head: supraglenoid tubercle
Short head: apex of coracoid process

  • radial tuberosity and bicipital aponeurosis
54
Q

Biceps brachii innervation

A

Musculocutaneous C5/6

Anatomy Of The Upper Extremity (4 decks)

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