Advanced Flexor Carpi Ulnaris Muscle Quiz

Q1. Why is the proximal attachment of flexor carpi ulnaris clinically important in ulnar neuropathy?

• The musculocutaneous nerve terminates within it
• The median nerve passes through its distal tendon
• The ulnar nerve passes between its humeral and ulnar heads
• The radial nerve pierces its humeral head

Q2. A proximal ulnar nerve lesion in the forearm would be expected to affect flexor carpi ulnaris in which way?

• Wrist extension and radial deviation would be weakened
• Elbow extension would be abolished
• Wrist flexion and ulnar deviation would be weakened
• Forearm supination would be abolished

Q3. During attempted wrist flexion after a proximal ulnar nerve lesion, the hand may deviate toward which side because flexor carpi radialis remains active?

• Posterior side of the forearm
• Ulnar side
• Radial side
• Neither side under any circumstances

Q4. Why does flexor carpi ulnaris produce ulnar deviation in addition to wrist flexion?

• It crosses the wrist on the radial side
• It inserts on the base of the second metacarpal
• Its line of pull lies on the ulnar side of the wrist axis
• It inserts on the distal phalanges

Q5. Which statement correctly distinguishes flexor carpi ulnaris from most other superficial anterior forearm muscles?

• It is supplied by the ulnar nerve rather than the median nerve
• It is supplied by the posterior interosseous nerve
• It belongs to the posterior forearm compartment
• It is the only superficial muscle that flexes the wrist

Q6. Which relationship makes the flexor carpi ulnaris tendon useful as a landmark near the ulnar side of the wrist?

• The radial artery passes through its tendon
• The ulnar nerve and artery lie just lateral to its tendon near the wrist
• The median nerve lies within its tendon
• The posterior interosseous nerve crosses superficial to its tendon

Q7. Which distal attachment complex effectively extends the mechanical action of flexor carpi ulnaris beyond the pisiform?

• Pisohamate and pisometacarpal ligaments
• Scapholunate and lunotriquetral ligaments
• Annular and quadrate ligaments
• Coracoclavicular and coracoacromial ligaments

Q8. If flexor carpi ulnaris and extensor carpi ulnaris contract together, which movement is reinforced while their opposing flexion and extension actions tend to balance?

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

Q9. Which finding would best demonstrate that flexor carpi ulnaris is functioning during examination?

• Extension of the distal interphalangeal joints
• Abduction of the fingers against resistance
• Extension of the elbow against resistance
• A palpable tendon proximal to the pisiform during resisted wrist flexion and ulnar deviation

Q10. Which description best summarizes the anatomy of flexor carpi ulnaris?

• It is a superficial ulnar nerve supplied forearm muscle that flexes and ulnarly deviates the wrist and inserts on the pisiform
• It is a deep median nerve supplied muscle that extends and radially deviates the wrist
• It is a posterior forearm muscle that extends the fingers
• It is a radial nerve supplied muscle that inserts on the second metacarpal