Intermediate Flexor Digitorum Profundus Quiz

Q1. From which bone does flexor digitorum profundus primarily originate?

• Ulna
• Scapula
• Radius
• Humerus only

Q2. Which structure also contributes to the proximal attachment of flexor digitorum profundus?

• Annular ligament of the radius
• Interosseous membrane
• Flexor retinaculum
• Palmar aponeurosis

Q3. Which digits are mainly supplied by the ulnar nerve portion of flexor digitorum profundus?

• Thumb and little finger
• Thumb and index finger
• Ring and little fingers
• Index and middle fingers

Q4. Which digits are mainly supplied by the anterior interosseous nerve portion of flexor digitorum profundus?

• Index and middle fingers
• Thumb and little finger
• Ring and little fingers
• Thumb and index finger only

Q5. What happens to each flexor digitorum superficialis tendon as the flexor digitorum profundus tendon approaches the finger?

• It splits to allow the profundus tendon to pass through
• It fuses permanently with the profundus tendon
• It becomes part of the extensor expansion
• It passes deep to the distal phalanx

Q6. Which muscles arise from the tendons of flexor digitorum profundus in the hand?

• Thenar muscles
• Lumbricals
• Hypothenar muscles
• Dorsal interossei

Q7. Which tendon is commonly called the perforating tendon in the fingers?

• Flexor digitorum profundus tendon
• Flexor carpi radialis tendon
• Extensor digitorum tendon
• Flexor digitorum superficialis tendon

Q8. Which tendon is described as the perforated tendon in the fingers?

• Extensor indicis tendon
• Flexor digitorum superficialis tendon
• Flexor digitorum profundus tendon
• Palmaris longus tendon

Q9. How can flexor digitorum profundus function be tested in an individual finger?

• Ask the patient to extend the finger against resistance
• Hold the distal interphalangeal joint extended and ask the patient to abduct the finger
• Hold the proximal interphalangeal joint extended and ask the patient to flex the distal interphalangeal joint
• Hold the wrist flexed and ask the patient to extend the elbow

Q10. Which structure surrounds the flexor tendons within each finger and helps maintain them close to the phalanges?

• Extensor retinaculum
• Dorsal digital expansion only
• Fibrous digital sheath
• Palmar aponeurosis only