Expansion
Superior Thoracic, Thoracoacromial, Lateral Thoracic, Subscapular, Anterior Circumflex Humeral, Posterior Circumflex Humeral
Expansion
- S - Superior thoracic artery (first part, 1 branch)
- T - Thoracoacromial artery (second part)
- L - Lateral thoracic artery (second part)
- S - Subscapular artery (third part)
- A - Anterior circumflex humeral artery (third part)
- P - Posterior circumflex humeral artery (third part)
Remember 1, 2, 3: the part behind pectoralis minor gives 2 branches, and the part beyond it gives 3.