Intermediate Interosseous Membrane Quiz

Q1. Why does the predominant fiber orientation of the interosseous membrane facilitate force transmission from the radius to the ulna?

• The membrane converts all axial force into wrist extension
• Its fibers prevent any movement between the radius and ulna
• Its fibers transmit force directly from the radius to the scapula
• Axial loading of the radius tensions fibers that pass toward the ulna

Q2. Which deep anterior forearm muscle takes partial origin from the interosseous membrane?

• Flexor pollicis longus
• Flexor carpi ulnaris
• Pronator teres
• Palmaris longus

Q3. Which deep finger flexor takes partial origin from the interosseous membrane?

• Palmaris longus
• Flexor carpi radialis
• Flexor digitorum profundus
• Flexor digitorum superficialis

Q4. Which posterior forearm muscle takes partial origin from the interosseous membrane and extends the thumb?

• Extensor pollicis longus
• Brachioradialis
• Pronator teres
• Flexor carpi radialis

Q5. Which thumb abductor takes partial origin from the posterior aspect of the interosseous membrane?

• Adductor pollicis
• Opponens pollicis
• Abductor pollicis brevis
• Abductor pollicis longus

Q6. Which neurovascular bundle descends along the anterior surface of the interosseous membrane?

• Anterior interosseous nerve and vessels
• Median nerve and basilic vein
• Superficial radial nerve and cephalic vein
• Ulnar nerve and ulnar artery

Q7. Through which part of the interosseous membrane does the anterior interosseous artery pass posteriorly near the wrist?

• Guyon's canal
• An opening in its distal part
• The carpal tunnel
• An opening in the flexor retinaculum

Q8. What is located proximal to the main interosseous membrane between the radius and ulna?

• The triangular fibrocartilage complex
• The palmar aponeurosis
• A proximal gap and the separate oblique cord
• The flexor retinaculum

Q9. How does the interosseous membrane relate to the anterior and posterior compartments of the forearm?

• It lies entirely within the subcutaneous tissue
• It forms the superficial roof of both compartments
• It contributes to the partition between the anterior and posterior compartments
• It separates the arm from the forearm

Q10. What happens to the relationship of the radius and ulna during pronation?

• The ulna crosses over the radius
• The radius becomes fixed to the humerus
• The radius crosses over the ulna
• The bones separate completely