Exam 2 - Lecture 8 - Shoulder Complex and Joint

Question 1

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

Answer 1

Deltoid

Question 2

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

Answer 2

Infraspinatus

Question 3

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

Answer 3

Latissiumus dorsi

Question 4

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

Answer 4

Levator scapulae

Question 5

What muscle depresses the scapula?

Answer 5

The lower trapezius

Question 6

What muscle abducts the shoulder?

Answer 6

Middle deltoid

Question 7

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

Answer 7

The middle trapezius

Question 8

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

Answer 8

Pectoralis major

Question 9

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

Answer 9

Pectoralis minor (C)

Question 10

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

Answer 10

Rhomboids

Question 11

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

Answer 11

Serratus anterior

Question 12

What muscle achors and depresses the clavicle?

Answer 12

Subclavius

Question 13

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

Answer 13

Supraspinatus

Question 14

What muscle adducts and medially rotates the humerus?

Answer 14

Teres major

Question 15

What muscles function together to upwardly rotate the scapula?

Answer 15

Upper and lower trapezius

Question 16

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

Answer 16

Upper trapezius

Question 17

What muscle is depicted?

Answer 17

Infraspinatus

Question 18

What muscle is depicted?

Answer 18

Supraspinatus

Question 19

What muscle is depicted?

Answer 19

Teres major

Question 20

What muscle is depicted?

Answer 20

Teres minor

Question 21

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

Answer 21

120 degrees

Question 22

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

Answer 22

60 degrees

Question 23

What are the muscles that make up the rotator cuff?

Answer 23

Supraspinatus, infraspinatus, teres minor, and subscapularis

Question 24

What artery supplies blood to the infraspinatus?

Answer 24

Suprascapular artery

Question 25

What bones articulate at the sternoclavicular joint?

Answer 25

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

Question 26

What bones articulate in the acromioclavicular joint?

Answer 26

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

Question 27

What bones articulate in the glenohumeral joint?

Answer 27

Glenoid fossa of the **scapula** and the head of the **humerus**

Question 28

What is the blood supply of the teres major?

Answer 28

Circumflex scapular artery

Question 29

What is the distal attachment of the infraspinatus?

Answer 29

Middle facet of the greater tubercle of the humerus

Question 30

What is the distal attachment of the supraspinatus?

Answer 30

Superior facet of greater tubercle of humerus

Question 31

What is the distal attachment of the teres major?

Answer 31

Medial lip of intertubercular (bicipital) groove of humerus

Question 32

What is the proximal attachment of the infraspinatus?

Answer 32

Infraspinous fossa of the scapula

Question 33

What is the proximal attachment of the supraspinatus?

Answer 33

Supraspinous fossa of the scapula

Question 34

What is the proximal attachment of the teres major?

Answer 34

Posterior surface of inferior angle of scapula

Question 35

What is the proximal attachment of the teres minor?

Answer 35

Middle part of lateral border of scapula

Question 36

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

Answer 36

Scapulohumeral rhythm

Question 37

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

Answer 37

Acromioclavicular joint

Question 38

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

Answer 38

Sternoclavicular joint

Question 39

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?

Answer 39

Glenohumeral joint

Question 40

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

Answer 40

Glenoidhumeral joint

Question 41

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

Answer 41

Acromioclavicular

Question 42

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

Answer 42

Acromioclavicular joint

Question 43

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

Answer 43

Glenohumeral joint

Question 44

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

Answer 44

Coracoclavicular ligament

Question 45

What ligament of the shoulder complex reinforces the joint capsule?

Answer 45

Superior and inferior acromioclavicular ligaments

Question 46

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

Answer 46

Costoclavicular ligament

Question 47

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

Answer 47

Anterior/posterior sternoclavicular ligaments

Question 48

What muscle is most often torn in the rotator cuff?

Answer 48

Supraspinatus

Question 49

What nerve innervates the infraspinatus?

Answer 49

Suprascapular nerve (C5 and C6)

Question 50

What nerve innervates the supraspinatus

Answer 50

Suprascapular nerve (C4, C5, and C6)

Question 51

What nerve innervates the teres major?

Answer 51

Low subscapular nerve (C5, C6)

Question 52

What nerve innervates the teres minor?

Answer 52

Axillary nerve (C5 and C6)

Question 53

What nerve is involved in deltoid paralysis?

Answer 53

Axillary nerve

Question 54

What nerve is involved in serratus anterior paralysis?

Answer 54

Long thoracic nerve

Question 55

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

Answer 55

Cutaneous branches of dorsal rami

Question 56

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

Answer 56

Supraclavicular nerves

Question 57

What structures are contained within the quadrilateral space?

Answer 57

Axillary nerve and posterior circumflex humeral artery

Question 58

What structures define the boundries of the quadrilateral space?

Answer 58

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

Question 59

What supplies blood to the supraspinatus?

Answer 59

Suprascapular artery

Question 60

Where does the left subclavian artery originate?

Answer 60

Direct branch from aortic arch

Question 61

Where does the right subclavian artery originate?

Answer 61

Branch from brachiocephalic

Question 62

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

Answer 62

Sternoclavicular joint

Question 63

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

Answer 63

Sternoclavicular