2.5 Scapular & Pectoral Regions

Question 1

What forms the girdle of the upper limb?

Answer 1

clavicle and scapula

Question 2

The head of the humerus articulates with the … of the scapula

Answer 2

glenoid cavity

Question 3

The inter tubercular groove is between the tubercles and holds the tendon of the …

Answer 3

long head of the biceps brachia m.

Question 4

“V” shaped roughened area on lateral aspect of mid shaft of humerus where deltoid m. inserts

Answer 4

Deltoid tuberosity

Question 5

What muscle does elevation action at pectoral girdle?

Answer 5

levator scapulae

Question 6

What muscle does depression action at pectoral girdle?

Answer 6

Trapezius

Question 7

What muscle does protraction (abduction) action at pectoral girdle?

Answer 7

Pectoralis minor

Question 8

What muscle does retraction (adduction) action at pectoral girdle?

Answer 8

Rhomboid major and minor

Question 9

What muscle does lateral rotation (upward) action at pectoral girdle?

Answer 9

Trapezius

Question 10

What muscle does medial rotation (downward) action at pectoral girdle?

Answer 10

Rhomboid major and minor

Question 11

What muscle does flexion at the glenohumeral joint?

Answer 11

Deltoid (anterior fibers)

Question 12

What muscle does extension at the glenohumeral joint?

Answer 12

Deltoid (posterior fibers), latissimus dorsi

Question 13

What muscle does abduction at the glenohumeral joint?

Answer 13

Deltoid (middle fibers) , supraspinatus (initiates first 15 degrees)

Question 14

What muscle does adduction at the glenohumeral joint?

Answer 14

Pectorals major, latissimus doors, theres major

Question 15

What muscle does medial rotation at the glenohumeral joint?

Answer 15

Subscapularis, teres major, deltoid (anterior fibers)

Question 16

What is the main source of arterial blood for the upper limb?

Answer 16

subclavian artery

Question 17

The subclavian artery gives rise to several branches including the … which supplies muscles of the scapula via … and … arteries

Answer 17

thyrocervical trunk (supra scapular and transverse cervical arteries)

Question 18

The subclavian artery becomes the … as it crosses the lateral border of the first rib.

Answer 18

axillary artery

Question 19

What nerve innervates the trapezius?

Answer 19

spinal accessory n.

Question 20

What nerve innervates the latissimus dorsi?

Answer 20

Thoracodorsal n.

Question 21

What nerve innervates the levator scapulae?

Answer 21

dorsal scapular n.

Question 22

What nerve innervates the rhomboid minor?

Answer 22

dorsal scapular n.

Question 23

What nerve innervates the rhomboid major?

Answer 23

dorsal scapular n.

Question 24

What is the innervation of the pectoralis major m?

Answer 24

medial and lateral pectoral nerves

Question 25

What is the action of the pectoralis major m?

Answer 25

adducts and medially rotates humerus, flexes humerus

Question 26

Proximal attachment of pectoralis major m?

Answer 26

clavicular head and sternocostal head

Question 27

What is the distal attachment of the pectoralis major m?

Answer 27

lateral lip of inter tubercular sulcus of humerus

Question 28

What is the innervation of the pectoralis minor m?

Answer 28

medial pectoral n.

Question 29

What is the action of pectoralis minor m?

Answer 29

protracts, depresses, stabilizes scapula

Question 30

What is the proximal attachment of the pectoralis minor m?

Answer 30

ribs 3-5

Question 31

What is the distal attachment of the pectoralis minor muscle?

Answer 31

coracoid process of scapula

Question 32

What is the innervation of the subclavius m?

Answer 32

nerve to subclavius

Question 33

What is the action of the subclavius muscle?

Answer 33

anchors and depresses clavicle

Question 34

What is the proximal attachment of the subclavius m?

Answer 34

junction of 1st rib and its costal cartilage

Question 35

What is the distal attachment of the subclavius m?

Answer 35

inferior surface of middle third of clavicle

Question 36

A clavicular fracture may result in injury to ...

Answer 36

brachial plexus

Question 37

Clavicular fracture may sever ... leading to fatal hemorrhage or thromboembolism.

Answer 37

subclavian v.

Question 38

What is the innervation of the serrates anterior m?

Answer 38

long thoracic n

Question 39

What is the action of the serrates anterior m?

Answer 39

protracts scapula; rotates scapula

Question 40

What is the proximal attachment of the serrates anterior m?

Answer 40

ribs 1-8

Question 41

What is the distal attachment of the serrates anterior m?

Answer 41

anterior surface of medial border of scapula

Question 42

Winged scapula is the common cause in ... paralysis?

Answer 42

serrates anterior m

Question 43

Winged scapula is dues to a lesion of the ...

Answer 43

long thoracic n.

Question 44

What are the muscles of the "rotator cuff"?

Answer 44

supraspinatus, infraspinatus, teres minor, and subscapularis

Question 45

What is the innervation of the Deltoid m?

Answer 45

axillary nerve

Question 46

What is the action of the Deltoid m?

Answer 46

Flexes and medially rotates arm, abducts arm, extends and laterally rotates arm

Question 47

What is the proximal attachment of the Deltoid m?

Answer 47

lateral clavicle, acromion, spine of scapula (posteriorly)

Question 48

What is the distal attachment of the Deltoid m?

Answer 48

deltoid tuberosity of humerus

Question 49

What is commonly damaged with fracture of the surgical neck of humerus?

Answer 49

axillary nerve and posterior humeral circumflex a

Question 50

Axillary nerve injury may result in ... atrophy, loss of sensation in skin of shoulder, and weakness

Answer 50

deltoid m

Question 51

What is the innervation of the Supraspinatus m?

Answer 51

suprascapular n

Question 52

What is the action of the Supraspinatus m?

Answer 52

initiates and assists deltoid in abduction of arm

Question 53

What is the proximal attachment of the Supraspinatus m?

Answer 53

Supraspinous fossa of scapula

Question 54

What is the distal attachment of the Supraspinatus m?

Answer 54

greater tubercle of humerus

Question 55

What is the innervation of the Infraspinatus m?

Answer 55

supra scapular n

Question 56

What is the action of the Infraspinatus m?

Answer 56

lateral rotation of arm

Question 57

What is the proximal attachment of the Infraspinatus m?

Answer 57

infraspinous fossa of scapula

Question 58

What is the distal attachment of the Infraspinatus m?

Answer 58

greater tubercle of humerus

Question 59

What is the innervation of the Teres minor m?

Answer 59

axillary nerve

Question 60

What is the action of the Teres minor m?

Answer 60

lateral rotation of arm

Question 61

What is the proximal attachment of the Teres minor m?

Answer 61

lateral border of scapula

Question 62

What is the distal attachment of the Teres minor m?

Answer 62

greater tubercle of humerus

Question 63

What is the innervation of the Subscapularis m?

Answer 63

upper and lower subscapular nerves

Question 64

What is the action of the Subscapularis m?

Answer 64

medially rotates and adducts arm

Question 65

What is the proximal attachment of the Subscapularis m?

Answer 65

subscapular fossa of scapula

Question 66

What is the distal attachment of the Subscapularis m?

Answer 66

lesser tubercle of humerus

Question 67

What is the innervation of the Teres major m?

Answer 67

lower subscapular n

Question 68

What is the action of the Teres major m?

Answer 68

adducts and medially rotates arm

Question 69

What is the proximal attachment of the Teres major m?

Answer 69

inferior angle of scapula

Question 70

What is the distal attachment of the Teres major m?

Answer 70

medial lip of intertubercular sulcus of humerus