Beginner Extensor Pollicis Longus Quiz
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This quiz contains 10 questions. Click below to begin.
Q1. In which compartment of the forearm is extensor pollicis longus located?
- Posterior compartment
- Hypothenar compartment
- Thenar compartment
- Anterior compartment
Q2. Extensor pollicis longus belongs to which layer of the posterior forearm muscles?
- Superficial anterior layer
- Superficial layer
- Intermediate anterior layer
- Deep layer
Q3. From which forearm bone does extensor pollicis longus primarily originate?
- Radius
- Scaphoid
- Humerus
- Ulna
Q4. Which membrane contributes to the origin of extensor pollicis longus?
- Palmar aponeurosis
- Flexor retinaculum
- Synovial membrane of the elbow
- Interosseous membrane
Q5. Where does extensor pollicis longus insert?
- Base of the first metacarpal
- Radial styloid process
- Base of the distal phalanx of the thumb
- Base of the proximal phalanx of the thumb
Q6. What is the primary action of extensor pollicis longus at the thumb interphalangeal joint?
- Extension
- Adduction
- Flexion
- Opposition
Q7. Which nerve supplies extensor pollicis longus?
- Ulnar nerve
- Median nerve
- Posterior interosseous nerve
- Anterior interosseous nerve
Q8. The posterior interosseous nerve is derived from which major peripheral nerve?
- Ulnar nerve
- Musculocutaneous nerve
- Radial nerve
- Median nerve
Q9. Which digit is acted on by extensor pollicis longus?
- Index finger
- Thumb
- Middle finger
- Little finger
Q10. In addition to extending the thumb interphalangeal joint, extensor pollicis longus can also extend which thumb joint?
- Second metacarpophalangeal joint
- Distal radioulnar joint
- Metacarpophalangeal joint
- Proximal interphalangeal joint of the index finger