7. Hand and Wrist MCQs

A rock climber presents with pain and a "bowstringing" deformity of the index finger after feeling a pop. Rupture of which of the following annular pulleys is most biomechanically detrimental to normal finger flexion?

During an endoscopic carpal tunnel release, the surgeon must be aware of the motor branch of the median nerve. Through which of the following mechanisms does this recurrent motor branch most commonly exit the carpal tunnel?

To prevent bowstringing of the flexor tendons following a tenolysis procedure in zone II of the hand, the surgeon must preserve which of the following critical annular pulleys?

A 35-year-old man sustains a severe fall, leading to an Essex-Lopresti lesion. The central band of the interosseous membrane is torn. Which of the following best describes the normal anatomical orientation of the fibers of this central band?

A 25-year-old gymnast sustains a wrist injury, and an MRI reveals an avulsion of the triangular fibrocartilage complex (TFCC) from its foveal attachment. The fovea of the ulna lies anatomically between which two structures?

Compression of the posterior interosseous nerve (PIN) at the elbow frequently occurs at the Arcade of Frohse. This fibrous arch is formed by the proximal edge of which muscle?

In the surgical treatment of stenosing tenosynovitis (trigger finger), a release of the affected pulley is planned. To prevent bowstringing of the flexor tendons, which adjacent pulley MUST remain intact?

A patient suffers a laceration to the volar forearm, completely transecting the median nerve proximal to the elbow. Which muscle belly of the flexor digitorum profundus (FDP) will primarily lose its innervation?

De Quervain's tenosynovitis involves the first dorsal compartment of the wrist. Which of the following tendons are located in this compartment?

A patient presents unable to extend the interphalangeal joint of the thumb, but has normal wrist extension with radial deviation. Sensation over the dorsal web space is completely intact. Compression of which structure is most likely?

A 32-year-old patient sustains an isolated penetrating injury to the medial cord of the brachial plexus. Which of the following muscles will demonstrate normal strength on physical examination?

Which of the following annular pulleys are considered critical and must be preserved during a trigger finger release to prevent bowstringing of the flexor tendons?

A fracture of the medial epicondyle of the humerus often endangers which nerve?

A 40-year-old male sustains an injury to the primary stabilizing structure of the distal radioulnar joint (DRUJ). Which structure is most crucial for DRUJ stability?

The flexor pulleys of the finger prevent bowstringing of the flexor tendons. Which pulley is located directly over the proximal interphalangeal (PIP) joint?

A 45-year-old patient presents with pain and weakness in thumb extension and radial abduction. A diagnosis of De Quervain's tenosynovitis is made. Which tendons are involved?

A 35-year-old avid cyclist presents with profound weakness of the intrinsic muscles of his right hand and isolated numbness of the small finger. Nerve conduction studies confirm ulnar nerve compression at Guyon's canal. Which of the following structures forms the floor of this fibro-osseous anatomic tunnel?

When treating stenosing tenosynovitis (trigger finger) surgically, the A1 pulley is released. To prevent biomechanical bowstringing of the flexor tendons, which two pulleys of the finger must remain intact?

When performing a volar (Henry) approach to the proximal radius, which structure must be carefully identified and ligated to safely retract the brachioradialis laterally and the pronator teres medially?