Pectoral Region, Shoulder, Axilla

Question 1

what joint allows the scapula to move on the thoracic wall?

Answer 1

scapulothoracic joint

Question 2

what bone serves as a movable, crane-like strut from which the scapula and free limb are suspended

Answer 2

clavicle

Question 3

what is the passageway that extends between the neck and the upper extremities through which the long thoracic nerve and other structures pass

Answer 3

cervicoaxillary canal

Question 4

What is an example of a ball-and-socket type of joint

Answer 4

glenohumeral or shoulder joint

Question 5

what are the 3 components of a joint capsule

Answer 5

articular cartilage, synovial membrane, fibrous capsule

Question 6

what deepens the glenoid cavity

Answer 6

glenoid labrum

Question 7

Which part of the glenohumeral joint is the weakest area? Superior or inferior

Answer 7

Inferior part

Question 8

What are the 4 ligaments of the shoulder joint?

Answer 8

Glenohumeral joint
Coracohumeral joint
Transverse humeral ligament
Coracoacromial ligament

Question 9

What forms the anterior axillary fold?

Answer 9

Pectoralis major

Question 10

How many head does the pectoralis major have

Answer 10

2: sternocostal and clavicular head

Question 11

What muscle is a powerful adductor of the humerus

Answer 11

Pectoralis major

Question 12

What are the functions of the pectoralis major

Answer 12

Adduction when acting with latissimus dorsi

Medial rotation if humerus

Question 13

What is the action of pectoralis minor?

Answer 13

Protraction
Elevates ribs
Stabilizes scapula

Question 14

What muscle protects the subclavian vessels and the brachial plexus

Answer 14

Subclavius

Question 15

What muscle depresses the clavicle

Answer 15

Subclavius

Question 16

What innervates the serratus anterior

Answer 16

Long thoracic nerve

Question 17

Action of serratus anterior

Answer 17

Protractor of scapula
Rotates the scapula
Anchors the scapula

Question 18

What innervates the pectoralis major

Answer 18

Medial and lateral pectoral nerve

Question 19

What innervates the pectoralis minor

Answer 19

Medial pectoral nerve

Question 20

What innervates the trapezius

Answer 20

Spinal accessory nerve

Question 21

What is the action of trapezius

Answer 21

Descending - elevate scapula
Middle - retract scapula
Ascending - depress scapula

Question 22

Weakness of the trapezius would cause what

Answer 22

Drooping of shoulders

Question 23

What is the action of levator scapulae

Answer 23

Elevates the scapula

Rotates the scapula downwards

Question 24

Action of rhomboids

Answer 24

Retract scapula

Question 25

What acts with latissimus dorsi to adduct the arms

Answer 25

Pectoralis major

Question 26

Action of latissimus dorsi

Answer 26

Extension of arm | Downward rotation of scapula

Question 27

What muscle is important in climbing

Answer 27

Latissimus dorsi

Question 28

Action of deltoid

Answer 28

Flex Abduct Extend arm

Question 29

The anterior deltoid is uni or multipennate? While the middle is what?

Answer 29

Anterior - Unipennate | Middle - multipennate

Question 30

What are the rotator cuff muscles

Answer 30

Supraspinatous Infraspinatous Teres minor Subscapularis

Question 31

Action of teres major

Answer 31

Medially rotates arm

Question 32

Action of supraspinatous

Answer 32

Initially abducts the arm 15 degrees

Question 33

Action of infraspinatous

Answer 33

Lateral rotator of humerus

Question 34

Action of teres minor

Answer 34

Lateral rotator of humerus

Question 35

Action of subscapularis

Answer 35

Medially rotates the arm

Question 36

What are the apex, base, anterior, posterior, medial, lateral borders of the axilla

Answer 36

Apex - cervicoaxillary canal; 1st rib, clavicle, superior edge if scapula Base - skin Anterior wall - pectoralis minor and major Posterior wall - scapula and subscapularis Medial wall - serratus anterior Lateral wall - intertubercular sulcus of humerus

Question 37

Innervation of teres minor

Answer 37

Axillary nerve

Question 38

What innervates the deltoid

Answer 38

Axillary nerve

Question 39

What muscle causes the winging of scapula

Answer 39

Serratus anterior

Question 40

Where does the subclavian artery become the axillary artery

Answer 40

After the first rib

Question 41

Where does the axillary artery become the brachial artery

Answer 41

After the teres minor

Question 42

1st part of the axillary artery has

Answer 42

Superior thoracic artery

Question 43

2nd part of axillary artery has

Answer 43

Thoracoacromial artery | Lateral thoracic artery

Question 44

3rd part of the axillary artery has

Answer 44

Subscapular artery | Anterior and posterior circumflex humeral artery