Intermediate Quadrangular Space Quiz

Q1. Which structure separates the quadrangular space from the triangular space?

• Teres major
• Long head of triceps brachii
• Deltoid
• Surgical neck of the humerus

Q2. Which artery passes through the adjacent triangular space rather than the quadrangular space?

• Circumflex scapular artery
• Radial recurrent artery
• Posterior circumflex humeral artery
• Anterior circumflex humeral artery

Q3. Which nerve passes through the triangular interval rather than the quadrangular space?

• Axillary nerve
• Ulnar nerve
• Radial nerve
• Median nerve

Q4. From which part of the brachial plexus does the axillary nerve arise?

• Medial cord
• Upper trunk directly
• Lateral cord
• Posterior cord

Q5. Which spinal nerve roots contribute primarily to the axillary nerve?

• C8 and T1
• C7 and C8
• C5 and C6
• C4 and T1

Q6. After traversing the quadrangular space, the axillary nerve winds around which part of the humerus?

• Medial epicondyle
• Trochlea
• Lateral epicondyle
• Surgical neck

Q7. The posterior circumflex humeral artery usually arises from which artery?

• Axillary artery
• Brachial artery
• Radial artery
• Subclavian artery directly

Q8. Which muscle forms the prominent superficial muscular covering over the structures emerging from the quadrangular space?

• Brachialis
• Pectoralis minor
• Coracobrachialis
• Deltoid

Q9. Which cutaneous branch of the axillary nerve supplies skin over the lower part of the deltoid region?

• Superior lateral cutaneous nerve of the arm
• Posterior cutaneous nerve of the forearm
• Lateral cutaneous nerve of the forearm
• Medial cutaneous nerve of the arm

Q10. Which muscle forming a boundary of the quadrangular space is also supplied by the axillary nerve?

• Teres minor
• Long head of triceps brachii
• Teres major
• Latissimus dorsi