Pectoral Region

Question 1

Pectoralis major

Answer 1

Clavicular head - front of medial half of clavicle
Sternocostal head- sternum and upper 6 costal cartilages
Insertion- lateral lip of pectoralis major
N- medial and lateral pectoral nerves from medial and lateral chords of BP
A- medial rotation, flexion of arm

Question 2

Deltopectoral groove

Answer 2

Contains
1. Cephalic vein
2. Deltoid branch of thoracoacromial artery
3. Infraclavicular lymph nodes

Question 3

Structures that pierce clavipectoral fascia

Answer 3

1. Thoracoacromial artery
2. Cephalic vein
3. Lateral pectoral nerve
4. Lymphatics

Question 4

Boundaries of axillary

Answer 4

Apex- cervicoaxillary canal- transmits vessels and nerves from the neck to upper limb
Base-skin and axillary fascia
Anterior wall- pectoralis major and minor, subclavius, clavipectoral fascia
Posterior wall- subscapularis, Teres major, Latissimus dorsi
Medial wall- serratus anterior, ribs, intercostal muscles
Lateral wall- bicipital groove, long and short heads of biceps, Coracobrachialis

Question 5

Axillary folds

Answer 5

Anterior fold- lower border of pectoralis major
Posterior fold- lower border of Teres major and Latissimus dorsi

Question 6

Contents of axilla

Answer 6

1. Axillary artery and its branches
2. Axillary nerve and its tributaries
3. Brachial plexus
4. Intercostobrachial nerve
5. Axillary lymph nodes
6. Axillary tail of the breast
7. Fat