Topic Overview

Mnemonics – Scapular Region

1. Rotator Cuff Muscles (SITS)

👉 “SITS”

• Supraspinatus

• Infraspinatus

• Teres minor

• Subscapularis

2. Actions of Rotator Cuff

👉 “SITS = Stabilize + Rotate”

• Supraspinatus → abduction (0–15°)

• Infraspinatus → lateral rotation

• Teres minor → lateral rotation

• Subscapularis → medial rotation & adduction

3. Boundaries of Quadrangular Space

👉 “T.T.L.H”

• Teres minor (above)

• Teres major (below)

• Long head of triceps (medial)

• Humerus, surgical neck (lateral)

4. Boundaries of Upper Triangular Space

👉 “T-T-L”

• Teres minor (above)

• Teres major (below)

• Long head of triceps (lateral)

5. Boundaries of Lower Triangular Space (Triangular Interval)

👉 “T-L-L”

• Teres major (above)

• Long head of triceps (medial)

• Lateral head of triceps (lateral)

6. Contents of Intermuscular Spaces

👉 “A.C.R.”

• Axillary nerve + posterior circumflex humeral artery → Quadrangular space.

• Circumflex scapular artery → Upper triangular space.

• Radial nerve + profunda brachii artery → Lower triangular space.

7. Anastomosis Around Scapula

👉 “Some Dangerous Collaterals Around Shoulder”

• Suprascapular artery

• Dorsal scapular artery

• Circumflex scapular artery

• Acromial branch of thoracoacromial artery

• Subscapular artery (via circumflex scapular)

8. Muscles Forming Posterior Axillary Fold

👉 “L&T = Posterior Fold”

• Latissimus dorsi

• Teres major