Nerve & Tendon MCQs

During an ulnar collateral ligament (UCL) reconstruction using the docking technique, the surgeon decides to transpose the ulnar nerve subcutaneously. Which of the following is the primary risk factor for postoperative ulnar neuropathy in this specific scenario?

A 42-year-old competitive weightlifter undergoes an anterior single-incision repair for an acute complete distal biceps tendon rupture.

Postoperatively, he complains of significant numbness over the lateral aspect of his forearm. Which nerve is most likely injured?

During an in situ ulnar nerve decompression at the elbow, the surgeon must release multiple potential sites of compression. Which of the following is the most proximal site of potential ulnar nerve entrapment?

A 42-year-old female presents with chronic lateral elbow pain. She has point tenderness 4 cm distal to the lateral epicondyle. Pain is exacerbated by resisted extension of the middle finger with the elbow extended. What is the most likely site of nerve compression?

A 48-year-old female presents with numbness in her thumb, index, and middle fingers. Phalen's test is negative, but she has a positive Tinel's sign in the proximal forearm. She also reports pain in the proximal forearm with resisted forearm pronation. Which condition is most likely?

A 45-year-old weightlifter presents with a sudden 'pop' and ecchymosis in his right antecubital fossa. A reverse Popeye sign is noted. He undergoes a single-incision anterior approach for distal biceps tendon repair. Which of the following neurologic structures is at the highest risk of injury during this specific surgical approach?

A 45-year-old male presents with weakness in his intrinsic hand muscles and numbness in his small and ring fingers. Froment's sign is positive. Intraoperative exploration of the ulnar nerve at the elbow reveals compression by an anomalous muscle bridging the medial epicondyle and the olecranon. What is the name of this anatomical structure?

A patient presents with progressive weakness of the interosseous muscles and an inability to cross their index and middle fingers. Sensory examination reveals normal two-point discrimination over the entire little finger and the ulnar half of the ring finger. A focal compressive lesion is suspected. In which anatomical location is the lesion most likely located?

During an anterior transposition of the ulnar nerve at the elbow, the surgeon dissects proximally to resect the medial intermuscular septum, preventing nerve kinking. Which artery, traveling with the ulnar nerve in the posterior compartment of the arm, provides its primary blood supply and must be carefully managed?

A 45-year-old male is undergoing an anterior submuscular transposition of the ulnar nerve for recalcitrant cubital tunnel syndrome. During the procedure, the nerve is placed deep to which of the following muscular structures?

A 45-year-old male presents with a chronic mallet deformity of the ring finger and a secondary swan neck deformity. What is the primary pathoanatomic mechanism causing the PIP joint hyperextension (swan neck) in this setting?

A competitive cyclist presents with numbness in his small finger and the ulnar half of his ring finger on the volar aspect, along with weakness of finger abduction and adduction. Sensation over the dorso-ulnar aspect of the hand is completely intact. Based on these findings, compression of the ulnar nerve is most likely occurring in which zone of Guyon's canal?

A 45-year-old mechanic complains of lateral elbow pain radiating down the dorsal forearm. The pain is exacerbated by repetitive pronation and supination. On examination, maximal point tenderness is localized approximately 4 to 5 cm distal to the lateral epicondyle in the extensor muscle mass. Resisted active extension of the middle finger (with the elbow extended) reproduces the pain. There is no demonstrable motor weakness or finger drop. What is the most likely diagnosis?

A 50-year-old male is undergoing in-situ decompression of the ulnar nerve for severe cubital tunnel syndrome. The surgeon meticulously releases the nerve along its entire course around the elbow to prevent postoperative tethering. Which of the following is the most common anatomical site of ulnar nerve compression in this region?

A 24-year-old male sustains a C5-C6 brachial plexus avulsion injury (Erb's palsy). Six months post-injury, he has no elbow flexion but normal hand function. An Oberlin transfer is planned. Which of the following describes the classic Oberlin I transfer?

A 40-year-old male develops a boutonniere deformity of the index finger following a crush injury. What is the underlying pathoanatomy responsible for this specific deformity?

A 5-year-old girl is treated nonoperatively for a seemingly minimally displaced pediatric lateral condyle fracture. One year later, she is noted to have a nonunion. What is the most common long-term deformity and associated neurologic complication if left untreated?

During surgical decompression of the ulnar nerve for cubital tunnel syndrome, the surgeon must divide the roof of the cubital tunnel. What structure forms the roof of this tunnel?