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COB - Anatomy I > Exam 2 - Lecture 8 - Shoulder Complex and Joint > Flashcards

Exam 2 - Lecture 8 - Shoulder Complex and Joint Flashcards

1
Q

What muscle flexes, medially rotates, abducts, extends, and laterally rotates the humerus?

A

Deltoid

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2
Q

What muscle laterally rotates the huermus as well as holds it in place?

A

Infraspinatus

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3
Q

What muscle extends, adducts, and internally rotates the humerus?

A

Latissiumus dorsi

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4
Q

What muscle elevates the scapula as well as assists in the downward rotation of the scapula?

A

Levator scapulae

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5
Q

What muscle depresses the scapula?

A

The lower trapezius

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6
Q

What muscle abducts the shoulder?

A

Middle deltoid

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7
Q

What muscle adducts (i.e. retracts) the scapula?

A

The middle trapezius

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8
Q

What muscle adducts and medially rotates the arm, flexes the arm, extends the arm, and draws the scapula anteriorly and inferiorly?

A

Pectoralis major

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9
Q

What muscle draws the scapula inferior and anteriorly against the thoracic wall (i.e. stabilizes the scapula)?

A

Pectoralis minor (C)

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10
Q

What muscles adduct the scapula, rotate the glenoid fossa downward, and fixes the scapula to the thoracic wall?

A

Rhomboids

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11
Q

What muscle protacts the scapula, fixes the scapula to the thoracic wall, and rotates the scapula?

A

Serratus anterior

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12
Q

What muscle achors and depresses the clavicle?

A

Subclavius

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13
Q

What muscles works with the deltoid in abduction of the humerus as well as stabilizes the shoulder joint with the other rotator cuff muscles?

A

Supraspinatus

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14
Q

What muscle adducts and medially rotates the humerus?

A

Teres major

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15
Q

What muscles function together to upwardly rotate the scapula?

A

Upper and lower trapezius

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16
Q

What muscle elevates the scapula (i.e. shrugs the shoulder) that is NOT the levator scapulae?

A

Upper trapezius

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17
Q

What muscle is depicted?

A

Infraspinatus

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18
Q

What muscle is depicted?

A

Supraspinatus

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19
Q

What muscle is depicted?

A

Teres major

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20
Q

What muscle is depicted?

A

Teres minor

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21
Q

How much does the glenohumeral joint contribute to the full abduction of ROM?

A

120 degrees

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22
Q

How much does the scapulothoracic movement contribute to the full abduction of ROM?

A

60 degrees

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23
Q

What are the muscles that make up the rotator cuff?

A

Supraspinatus, infraspinatus, teres minor, and subscapularis

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24
Q

What artery supplies blood to the infraspinatus?

A

Suprascapular artery

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25
Q

What bones articulate at the sternoclavicular joint?

A

Articular notch of the sternum, the sternal end of the clavicle, and the first costal cartilage

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26
Q

What bones articulate in the acromioclavicular joint?

A

Concace facet on acromion process (scapula) and the convex facet on the lateral end of the clavicle

27
Q

What bones articulate in the glenohumeral joint?

A

Glenoid fossa of the scapula and the head of the humerus

28
Q

What is the blood supply of the teres major?

A

Circumflex scapular artery

29
Q

What is the distal attachment of the infraspinatus?

A

Middle facet of the greater tubercle of the humerus

30
Q

What is the distal attachment of the supraspinatus?

A

Superior facet of greater tubercle of humerus

31
Q

What is the distal attachment of the teres major?

A

Medial lip of intertubercular (bicipital) groove of humerus

32
Q

What is the proximal attachment of the infraspinatus?

A

Infraspinous fossa of the scapula

33
Q

What is the proximal attachment of the supraspinatus?

A

Supraspinous fossa of the scapula

34
Q

What is the proximal attachment of the teres major?

A

Posterior surface of inferior angle of scapula

35
Q

What is the proximal attachment of the teres minor?

A

Middle part of lateral border of scapula

36
Q

What is the relatively uninterrupted movement of the upper extremity from dependent position to full abduction?

A

Scapulohumeral rhythm

37
Q

What joint consists of the following ligaments: acromioclavicular ligaments and coracoclavicular ligament?

A

Acromioclavicular joint

38
Q

What joint consists of the following ligaments: anterior posterior sternoclavicular ligaments, costoclavicular ligament, and the interclavicular ligament?

A

Sternoclavicular joint

39
Q

What joint of the should complex is functionally triaxial, diathrotic, functions in flexion and extension, functions in abduction and adduction, function in circumduction, and functions in lateral/medial rotaiton of the humerus/arm?

A

Glenohumeral joint

40
Q

What joint of the shoulder compelx consists of the following ligaments: Glenohumeral ligament, coracohumeral ligament, and the coracoacromial ligament?

A

Glenoidhumeral joint

41
Q

What joint of the shoulder complex is functionally triaxial, diarthrotic, and functions in the gliding and rotation of the scapula on the clavicle?

A

Acromioclavicular

42
Q

What joint of the shoulder complex is structurally synovial and a plane?

A

Acromioclavicular joint

43
Q

What joint of the shoulder complex is structurally synovial and ball-and-socket?

A

Glenohumeral joint

44
Q

What ligament of the shoulder complex provides joint stability and is stronger than the clavicle itself?

A

Coracoclavicular ligament

45
Q

What ligament of the shoulder complex reinforces the joint capsule?

A

Superior and inferior acromioclavicular ligaments

46
Q

What ligament serves as the axis for elevation and depression and for protraction and retraction of the shoulder complex?

A

Costoclavicular ligament

47
Q

What ligament of the shoulder complex reinforce the capsule and check the anterior-posterior movement of the clavicular head?

A

Anterior/posterior sternoclavicular ligaments

48
Q

What muscle is most often torn in the rotator cuff?

A

Supraspinatus

49
Q

What nerve innervates the infraspinatus?

A

Suprascapular nerve (C5 and C6)

50
Q

What nerve innervates the supraspinatus

A

Suprascapular nerve (C4, C5, and C6)

51
Q

What nerve innervates the teres major?

A

Low subscapular nerve (C5, C6)

52
Q

What nerve innervates the teres minor?

A

Axillary nerve (C5 and C6)

53
Q

What nerve is involved in deltoid paralysis?

A

Axillary nerve

54
Q

What nerve is involved in serratus anterior paralysis?

A

Long thoracic nerve

55
Q

What nerves supply the skin on either side of the midline of the back?

A

Cutaneous branches of dorsal rami

56
Q

What nerves supply the skin over the clavicle and over the superior-lateral aspect of the pectoralis major?

A

Supraclavicular nerves

57
Q

What structures are contained within the quadrilateral space?

A

Axillary nerve and posterior circumflex humeral artery

58
Q

What structures define the boundries of the quadrilateral space?

A

Inferior glenohumeral capsule, teres major, triceps longus, and surgical neck of humerus

59
Q

What supplies blood to the supraspinatus?

A

Suprascapular artery

60
Q

Where does the left subclavian artery originate?

A

Direct branch from aortic arch

61
Q

Where does the right subclavian artery originate?

A

Branch from brachiocephalic

62
Q

Which joint of the shoulder complex is functionally diathrotic and triaxial?

A

Sternoclavicular joint

63
Q

Which joint of the shoulder complex is structurally synovial, shallow saddle, and has an articular disc?

A

Sternoclavicular

COB - Anatomy I (6 decks)

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