Beginner Extensor Carpi Ulnaris Quiz

Q1. In which compartment of the forearm is extensor carpi ulnaris located?

• Posterior compartment
• Hypothenar compartment
• Anterior compartment
• Thenar compartment

Q2. Extensor carpi ulnaris belongs to which layer of the posterior forearm muscles?

• Intermediate anterior layer
• Deep anterior layer
• Superficial layer
• Deep layer

Q3. From which humeral landmark does the humeral head of extensor carpi ulnaris arise?

• Medial epicondyle
• Lateral epicondyle
• Coronoid fossa
• Greater tubercle

Q4. Which forearm bone provides an additional proximal attachment for extensor carpi ulnaris?

• Scaphoid
• Capitate
• Ulna
• Radius

Q5. On which metacarpal does extensor carpi ulnaris insert?

• First metacarpal
• Second metacarpal
• Fifth metacarpal
• Third metacarpal

Q6. What is one primary action of extensor carpi ulnaris?

• Forearm pronation
• Finger flexion
• Wrist extension
• Wrist flexion

Q7. In addition to extension, which movement does extensor carpi ulnaris produce at the wrist?

• Thumb opposition
• Forearm supination
• Radial deviation
• Ulnar deviation

Q8. Which nerve supplies extensor carpi ulnaris?

• Ulnar nerve
• Anterior interosseous nerve
• Posterior interosseous nerve
• Median nerve

Q9. The posterior interosseous nerve is derived from which major nerve?

• Median nerve
• Ulnar nerve
• Musculocutaneous nerve
• Radial nerve

Q10. Which joint is primarily crossed by the distal tendon of extensor carpi ulnaris to produce its main actions?

• Shoulder joint
• Elbow joint only
• Thumb interphalangeal joint
• Wrist joint