Advanced Anatomical Spaces of the Upper Limb Quiz

Q1. Which structures form the inferior boundary of the quadrangular space?

• Short head of biceps brachii
• Pectoralis minor
• Teres minor
• Teres major

Q2. Which structures form the boundaries of the triangular space?

• Teres minor, teres major, and long head of triceps brachii
• Teres major, humerus, and short head of biceps brachii
• Deltoid, humerus, and coracobrachialis
• Supraspinatus, infraspinatus, and scapular spine

Q3. Which structures form the principal boundaries of the triangular interval?

• Teres minor, deltoid, and scapular spine
• Teres major, long head of triceps brachii, and humerus
• Coracobrachialis, biceps brachii, and humerus
• Teres minor, teres major, and medial border of the scapula

Q4. Compression within the quadrangular space most directly threatens which nerve?

• Median nerve
• Ulnar nerve
• Musculocutaneous nerve
• Axillary nerve

Q5. Which tendon forms the medial border of the anatomical snuffbox?

• Abductor pollicis longus
• Flexor pollicis longus
• Extensor pollicis brevis
• Extensor pollicis longus

Q6. Which tendons form the lateral border of the anatomical snuffbox?

• Extensor pollicis longus and flexor pollicis longus
• Abductor pollicis longus and extensor pollicis brevis
• Extensor indicis and extensor digitorum
• Flexor carpi radialis and palmaris longus

Q7. Tenderness in the anatomical snuffbox after a fall on an outstretched hand raises particular concern for fracture of which bone?

• Hamate
• Scaphoid
• Capitate
• Pisiform

Q8. Which tendons accompany the median nerve through the carpal tunnel?

• Only the flexor pollicis longus tendon
• Four flexor digitorum superficialis, four flexor digitorum profundus, and one flexor pollicis longus tendon
• Four extensor digitorum and four flexor digitorum superficialis tendons
• Flexor carpi radialis, flexor carpi ulnaris, and palmaris longus tendons only

Q9. Which nerve passes through Guyon's canal rather than the carpal tunnel?

• Median nerve
• Musculocutaneous nerve
• Ulnar nerve
• Axillary nerve

Q10. Which description best summarizes the functional importance of anatomical spaces in the upper limb?

• They organize passage of neurovascular and tendinous structures between regions and can become sites of compression
• They function primarily as synovial joints
• They prevent communication between adjacent upper limb regions
• They are empty cavities with no important structures