Intermediate Flexor Pollicis Longus Quiz
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This quiz contains 10 questions. Click below to begin.
Q1. Which part of the radius gives origin to flexor pollicis longus?
- Radial styloid only
- Anterior surface of the radius
- Posterior surface of the radius
- Head of the radius only
Q2. Which structure provides an additional proximal attachment for flexor pollicis longus?
- Palmar aponeurosis
- Extensor retinaculum
- Flexor retinaculum
- Interosseous membrane
Q3. Which muscle lies medial to flexor pollicis longus in the deep anterior forearm?
- Flexor digitorum profundus
- Extensor carpi ulnaris
- Brachioradialis
- Extensor pollicis longus
Q4. Which muscle lies deep to the distal tendons of the long flexors near the wrist and is closely related to flexor pollicis longus?
- Pronator quadratus
- Brachioradialis
- Pronator teres
- Anconeus
Q5. Which spinal nerve roots are most commonly associated with flexor pollicis longus?
- C5 and C6 only
- C3 and C4
- T2 and T3
- C8 and T1
Q6. Which synovial sheath is associated with the flexor pollicis longus tendon at the wrist and thumb?
- Subacromial bursa
- Olecranon bursa
- Ulnar bursa only
- Radial bursa
Q7. Which statement best describes the course of the flexor pollicis longus tendon at the wrist?
- It passes beneath the flexor retinaculum through the carpal tunnel
- It passes beneath the extensor retinaculum
- It passes through Guyon's canal
- It passes superficial to the flexor retinaculum
Q8. Which joint provides the most specific test of flexor pollicis longus function?
- Radioulnar joint
- Distal interphalangeal joint of the index finger
- Interphalangeal joint of the thumb
- Elbow joint
Q9. Which muscle works with flexor pollicis longus during powerful flexion of the thumb but acts primarily at the metacarpophalangeal joint?
- Extensor indicis
- Flexor pollicis brevis
- Extensor pollicis longus
- Abductor pollicis longus
Q10. How can flexor pollicis longus be tested clinically?
- Ask for thumb extension against resistance
- Stabilize the proximal phalanx and ask for interphalangeal flexion against resistance
- Ask for finger abduction against resistance
- Stabilize the wrist and ask for elbow extension