Beginner Extensor Digitorum Quiz

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

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

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

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

Q3. From which humeral landmark does extensor digitorum primarily originate?

• Lateral epicondyle
• Radial tuberosity
• Greater tubercle
• Medial epicondyle

Q4. Which common tendon contributes to the proximal attachment of extensor digitorum?

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

Q5. Extensor digitorum primarily acts on which digits?

• Digits 2 to 5
• Thumb only
• Digits 4 and 5 only
• Digits 1 and 2 only

Q6. What is the primary action of extensor digitorum at the metacarpophalangeal joints?

• Extension
• Adduction only
• Opposition
• Flexion

Q7. Into which structures on digits 2 to 5 do the extensor digitorum tendons contribute?

• Palmar aponeurosis
• Flexor tendon sheaths
• Extensor expansions
• Flexor retinaculum

Q8. Which nerve supplies extensor digitorum?

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

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

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

Q10. In addition to extending the fingers, extensor digitorum can assist which movement?

• Wrist extension
• Forearm pronation
• Thumb opposition
• Wrist flexion