Beginner Extensor Carpi Radialis Brevis Quiz

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

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

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

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

Q3. From which humeral landmark does extensor carpi radialis brevis primarily originate?

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

Q4. Which common tendon contributes to the proximal attachment of extensor carpi radialis brevis?

• Biceps tendon
• Common flexor tendon
• Common extensor tendon
• Triceps tendon

Q5. On which metacarpal does extensor carpi radialis brevis insert?

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

Q6. What is a primary action of extensor carpi radialis brevis?

• Elbow extension
• Finger flexion
• Wrist flexion
• Wrist extension

Q7. In addition to wrist extension, which movement is produced by extensor carpi radialis brevis?

• Thumb opposition
• Radial deviation
• Forearm pronation
• Ulnar deviation

Q8. Which nerve supplies extensor carpi radialis brevis?

• Ulnar nerve
• Deep branch of the radial nerve
• Anterior interosseous nerve
• Median nerve

Q9. Extensor carpi radialis brevis primarily acts on which joint?

• Wrist joint
• Shoulder joint
• First carpometacarpal joint
• Distal interphalangeal joint

Q10. Which muscle has a similar name and works with extensor carpi radialis brevis in wrist extension and radial deviation?

• Extensor carpi ulnaris
• Extensor carpi radialis longus
• Pronator quadratus
• Flexor carpi ulnaris