Section 1: Breast & Pectoral Region

Question 1

Breast & Pectoral Region

Pectoralis Minor

Answer 1

Or: Ribs 3-5
Ins: Coracoid Process
Inv: 1. Lateral Pectoral Nerve 2. Medial Pectoral Nerve (Medial cord of the brachial plexus)
BS:
Action: Stabilizes the scapula, depresses the shoulder

Question 2

Breast & Pectoral Region

Pectoralis Major

Answer 2

Or: 1. Sternum 2. Clavicle
Ins: Lat. Lip of bicipital groove
Inv: Medial Pectoral Nerve
BS:
Action: 1. Adduct 2. Medial/internally rotate Arm

Question 3

Breast & Pectoral Region

Breast Tissues (2)

Answer 3

1. Glandular Tissue (Parenchyma)-- Lactiferous glands:
Mammary lobes (Lobules) --> Lactiferous Ducts --> Lactiferous Sinus --> Products secreted via nipple

2. Connective Tissue (Stroma)
   A. Connective Fibrous Tissue Ligament
   B. Fat

Question 4

Breast & Pectoral Region

Breast: Inv. BS

Answer 4

Inv: 1. Supraclavicular nn. 2. Intercostal nn, (medial mammary branches) 2. Intercostal nn. (lateral mammary branches)

BS: 1. Internal Thoracic (Int. Mammillary) Artery

2. Lateral Mammary branches –>3. Medial Mammary branches –> 4. Lateral Thoracic Artery –> Axillary Artery
   * ** Axillary and Internal thoracic vein***

Question 5

Breast & Pectoral Region

Arm (Inv.)

Answer 5

Anterior: Musculocutaneous Nerve
Posterior: Radial Nerve

Question 6

Breast & Pectoral Region

Forearm (Inv.)

Answer 6

Anterior: Median Nerve (Primary)
**Exception: Ulnar N. supplies: Flexor Carpi Ulnaris & Medial 1/2 of FDP

Posterior: Radial Nerve

Question 7

Breast & Pectoral Region

Hand (Inv.)

Answer 7

Intrinsic Muscles: Ulnar Nerve (Primary)

**Exception: Median Nerve Supplies: Thenar group & 1st/2nd lumbricals

Question 8

Breast & Pectoral Region

Compartments Shared Similarities

Answer 8

1. Function
2. Inner Action
3. Blood Supply

Question 9

Breast & Pectoral Region

Exclusive Sensory Areas of Peripheral Nerves:

1. Axillary Nerve
2. Ulnar Nerve
3. Radial Nerve
4. Medial Nerve

Answer 9

1. A.N.: Lateral upper arm area of the deltoid
2. U.N.: Pinky
3. R.N: 1st dorsal web space
4. M.N: Lateral end of pointer finger

Question 10

Breast & Pectoral Region

Subclavian Artery and its branches supply?

Answer 10

1. Structures in the neck
2. Part of the thoracic wall
3. Entire upper limb

Question 11

Breast & Pectoral Region

Axillary Artery is the continuation of?

Answer 11

Subclavian artery and begins at the lateral border of the 1st Rib

Question 12

Breast & Pectoral Region

Brachial Artery continuation of?

Answer 12

Axillary artery and begins at the lateral, lower border of the teres major

Question 13

Breast & Pectoral Region

In the cubital Fossa the brachial artery…?

Answer 13

Bifurcates into the radial and ulnar arteries of the forearm.

Question 14

Breast & Pectoral Region

Deep subclavian vein turns into?

Answer 14

Cephalic Vein

Question 15

Breast & Pectoral Region

Deep Axillary vein turns into?

Answer 15

1. Brachial vv.

2. Basilic vein