Nerve & Tendon MCQs

A 50-year-old woman presents with numbness in her right ring and small fingers, along with weakness in hand grip. Which of the following physical examination findings would best differentiate a C8 radiculopathy from cubital tunnel syndrome?

Following a severe crush injury to the forearm, a patient exhibits a complete median nerve palsy. According to the Sunderland classification, a third-degree peripheral nerve injury is characterized by the disruption of the axon and which other structural layer, while the perineurium remains intact?

A 45-year-old male presents with an inability to extend his thumb and digits at the metacarpophalangeal joints. Wrist extension is preserved but deviates radially. He has no sensory deficits. The most likely site of nerve compression is:

A 45-year-old woman presents with vague forearm pain, weakness of the flexor pollicis longus, and numbness in the radial three and a half digits. Radiographs show a bony spur on the anteromedial distal humerus. Which structure is compressed as it passes under the Ligament of Struthers?

A patient presents with an isolated compression neuropathy of the posterior interosseous nerve (PIN). The most common site of compression is the arcade of Frohse, which is formed by the proximal tendinous edge of which muscle?

While performing a volar approach to the proximal radius (Henry approach), the surgeon must carefully identify and protect the median nerve. Between which two muscle bellies does the median nerve typically pass as it exits the cubital fossa?

A patient presents with proximal median nerve compression. Radiographs reveal a bony exostosis on the anteromedial aspect of the distal humerus. Compression is likely occurring beneath a ligament connecting this exostosis to the medial epicondyle. What is this structure?

A 25-year-old male sustains a laceration over the thenar eminence. He demonstrates an inability to oppose the thumb but maintains normal thumb adduction. Which of the following muscles is primarily innervated by the deep branch of the ulnar nerve and remains functional?

The lumbrical muscles of the hand are unique because they originate from tendons and insert onto tendons. Which of the following accurately describes the typical innervation pattern of the lumbricals?

During an open cubital tunnel release, the surgeon must be careful to protect the medial antebrachial cutaneous nerve. What is the typical anatomic relationship of this nerve to the basilic vein in the distal arm?

The anterior interosseous nerve (AIN) is a motor branch of the median nerve. Which of the following muscles is NOT innervated by the AIN?

During an in situ ulnar nerve decompression at the cubital tunnel, the nerve is traced proximally. Which structure can compress the ulnar nerve as it pierces the medial intermuscular septum?

A patient cannot make an "OK" sign with their thumb and index finger. Which muscle is unaffected in isolated Anterior Interosseous Nerve (AIN) syndrome?

A patient presents with isolated weakness of the abductor digiti minimi, interossei, and the two ulnar lumbricals, but has normal sensation over the entire little finger and the ulnar half of the ring finger. Based on the zones of Guyon's canal, a compressive lesion is most likely located in which zone, and bounded radially by which structure?

An avid cyclist presents with isolated weakness of the intrinsic hand muscles, resulting in a weak pinch grip, but maintains normal sensation over the volar and dorsal little finger. Compression of the ulnar nerve is most likely occurring in which anatomical region?

A 35-year-old carpenter suffers a deep laceration to the volar palm, severing the flexor digitorum profundus (FDP) tendon to the index finger. Which lumbrical muscle originates from this specific tendon, and what is its normal innervation?

A patient presents with an isolated laceration to the recurrent motor branch of the median nerve at the wrist. Which of the following intrinsic thumb muscles will most likely retain normal function due to its sole innervation by the ulnar nerve?

A 30-year-old carpenter suffers a deep laceration to the volar aspect of his hand, severing the deep branch of the ulnar nerve. Which of the following lumbrical muscles will most likely lose innervation?

A 45-year-old female with systemic sclerosis (scleroderma) suffers from severe, medically refractory Raynaud's phenomenon. She is scheduled for a digital sympathectomy. Which of the following is the primary anatomic target during this procedure?

A 50-year-old male is diagnosed with cubital tunnel syndrome. During surgical decompression, the surgeon must release the ulnar nerve through several potential sites of compression. Which of the following structures is the MOST common site of ulnar nerve compression in the cubital tunnel?