Surgical Anatomy & Approaches MCQs

A 22-year-old male driver involved in a high-speed dashboard collision sustains a posterior hip dislocation. Which specific nerve injury is most frequently associated with this mechanism?

A 32-year-old male sustains a posterior wall acetabular fracture with a posterior hip dislocation. Following closed reduction, he is noted to have a new-onset foot drop. Which component of the sciatic nerve is most commonly injured, and what is its anatomic relation at the greater sciatic notch?

A 35-year-old male sustains a posterior wall acetabular fracture with an associated posterior hip dislocation. Post-reduction, he is unable to dorsiflex his foot or extend his toes. Which specific nerve division is most likely injured?

During the modified Henry approach for volar plating of a distal radius fracture, the surgeon develops the interval between the flexor carpi radialis (FCR) and the radial artery. Retraction of which muscle exposes the pronator quadratus?

A 28-year-old male presents with a traumatic posterior hip dislocation following a dashboard injury. The hip is reduced in the emergency department 4 hours post-injury. Post-reduction examination reveals new weakness in ankle dorsiflexion and decreased sensation over the dorsal foot. Which nerve division is most likely injured?

A 28-year-old volleyball player complains of vague posterior shoulder pain and numbness over the lateral deltoid. MRI confirms Quadrilateral Space Syndrome causing compression of the axillary nerve and posterior humeral circumflex artery. Which of the following structures forms the inferior border of this anatomic space?

During an anterior intrapelvic (ilioinguinal or Stoppa) approach to the acetabulum, the surgeon encounters significant bleeding over the superior pubic ramus. This bleeding is most likely originating from an anastomosis between which two vessels?

The anterior (Henry) approach to the radius utilizes an internervous plane. Proximally, this plane runs between muscles supplied by which two nerves?

The axillary nerve and posterior circumflex humeral artery exit the axilla through the quadrangular space. What forms the inferior border of this space?

In piriformis syndrome, variations in the relationship between the sciatic nerve and the piriformis muscle are often cited. What is the most common anatomical relationship between these two structures?

A patient presents with isolated weakness of the teres minor and deltoid following a posterior shoulder dislocation. The injured nerve passes through a quadrilateral space in the posterior shoulder. Which of the following muscles forms the inferior border of this anatomical space?

During an ilioinguinal approach to the acetabulum, severe hemorrhage is encountered dissecting over the superior pubic ramus near the symphysis. This is most likely due to an inadvertent injury to the 'corona mortis'. This structure represents an anastomosis between which two vascular systems?

The Smith-Petersen (anterior) approach to the hip utilizes a true internervous plane. Which of the following describes the innervation of the muscles forming the superficial boundary of this approach?

According to the Beaton and Anson classification of sciatic nerve variants, the normal anatomy (Type A) involves the undivided sciatic nerve exiting below the piriformis muscle. What describes the second most common variant (Type B)?

The anterior (Smith-Petersen) approach to the hip utilizes a true internervous plane. During the deep dissection of this approach, a specific vessel is routinely identified crossing the surgical field and must often be ligated. This vessel is a branch of which of the following arteries?

During an ilioinguinal approach for an anterior column acetabular fracture, the middle window is accessed. What are the respective lateral and medial borders of this specific surgical window?

The 'corona mortis' is a vascular anastomosis of significant importance during anterior approaches to the pelvis. It connects the obturator vessels with which of the following vascular systems?

During a deltopectoral approach to the shoulder, the axillary nerve is at risk as it exits the axilla. What is its correct anatomical course relative to the quadrangular space?

A surgeon is performing a posterior approach to the humeral shaft for open reduction internal fixation. On average, at what distance proximal to the radiocapitellar joint does the radial nerve cross the lateral intermuscular septum to enter the anterior compartment?

The Smith-Petersen (anterior) approach to the hip utilizes a true internervous plane. Which two nerves supply the muscles that form the superficial interval of this approach?