Shoulder, Peck and Breast

Question 1

Function of the Deltoid

Answer 1

Abducts humerus

Question 2

Muscles of the Rotator Cuff

Answer 2

SITS- Supraspinatus, Infraspinatus, Teres Minor, Subscapularis

Question 3

Function of supraspinatus muscle

Answer 3

• Part of rotator cuff

- Initiates abduction of the arm (first 15 degrees). Abduction is then completed by the deltoid.

Question 4

Function of Teres Major

Answer 4

Adducts and medially rotates arm

Question 5

Function of Latissimus dorsi

Answer 5

Extends, adducts, and medially rotates humerus at shoulder

Question 6

Function of Rhomboids

Answer 6

Fixes scapula to thoracic wall; retracts scapula towards vertebrate and rotates it medially

Question 7

Main arterial supply to shoulder

Answer 7

Transverse cervical artery, suprascapular artery, and the circumflex scapular artery.

Question 8

Quandrangular Space

Answer 8

Bordered by: teres minor, teres major, long head of triceps, and humerus. Found within it: Axillary nerve and Posterior circumflex humeral artery

Question 9

Triangular Space

Answer 9

Bordered by: teres minor, teres major, long head of triceps. Found within it: circumflex scapular artery

Question 10

Triangular Interval

Answer 10

Bordered by: teres major, long head of triceps, and lateral head of triceps. Found within it: Profunda brachii artery and Radial nerve

Question 11

Branches of the Axillary Artery

Answer 11

(Screw The Lawyer Save A Patient)

1st part (1 branch): Superior thoracic artery

2nd part (2 branches) Behind pec minor: Thoracoacromial trunk (Acromial, Deltoid, Pectoral and Clavicular) and Lateral thoracic arteries

3rd part (3 branches): Subscapular (circumflex scapular and thoracodorsal), anterior and posterior circumflex humeral arteries

Question 12

Arteries and Nodes associated with the breasts

Answer 12

Arteries: Lateral thoracic, thoracoacromial, and Internal Thoracic

Nodes (CLASP): Central, Lateral (humeral), Apical, Subscapular (posterior), Pectoral (anterior)

Question 13

Quadrant of Breast most likely to have breast cancer

Answer 13

Superolateral quadrant.

Question 14

Lateral Thoracic Artery

Answer 14

Arises from axillary artery. Supplies subscapularis, pec major/minor and breasts

Question 15

Function of circumflex scapular artery

Answer 15

Supplies teres major, teres minor and infrapinatus muscles. Found in the triangular space.

Question 16

Army over Navy refers to what?

Answer 16

The relative positions of the suprascapular artery and nerve in relation to the SUPERIOR TRANSVERSE SCAPULAR LIGAMENT. This ligament bridges the scapular notch, creating an aperature or a foramen for the nerve to run through and the artery to run over.

Question 17

The four branches off the thoracoacromial artery. What is the thoracoacromial artery a branch of?

Answer 17

Clavicular branch, Acromial branch, Deltoid branch, Pectoral branch.

Thoracoacromial is a branch off the Axillary artery (sTlsap)

Question 18

What serves as the reference point to divide the Axillary artery into 3 sections?

Answer 18

Pec Minor

Question 19

Branches of thyrocervical trunk

Answer 19

Inferior thyroid artery, transverse cervical artery and suprascapular artery

Question 20

Branches of costocervical trunk

Answer 20

Deep cervical artery and the superior intercostal artery which give rise to the first and second posterior intercostal arteries.