Surgical Anatomy & Approaches MCQs

The corona mortis is a critical vascular anastomosis that can cause life-threatening hemorrhage during pelvic surgery, particularly during the ilioinguinal approach. It represents a connection between which two vascular systems?

Figure 10 represents a cross-section of the shoulder. Which nerve exits the axilla posteriorly through the quadrilateral space?

Figure 4 demonstrates a cross-section of the posterior thigh. The sciatic nerve generally divides into the tibial and common peroneal nerves proximally. Which muscle is exclusively innervated by the common peroneal division of the sciatic nerve?

During the Kocher approach to the radial head, the surgeon dissects through an internervous plane. This plane lies between the extensor carpi ulnaris and which other muscle?

The ilioinguinal approach is commonly used for anterior column acetabular fractures. Which nerve is at greatest risk of iatrogenic injury during the mobilization of the structures in the "middle window"?

During a deltoid-splitting lateral approach to the proximal humerus, the axillary nerve is at significant risk of iatrogenic injury. What is the average anatomical distance from the lateral tip of the acromion to the axillary nerve in an adult?

During an ilioinguinal approach for an anterior column acetabular fracture, severe hemorrhage is encountered upon dissection over the superior pubic ramus. This bleeding is most likely from the corona mortis, an anastomosis between the:

The superficial radial nerve is at risk during the distal extent of the Henry approach to the forearm. Anatomically, it emerges from beneath which muscle in the distal third of the forearm to become subcutaneous?

During a deltopectoral approach for a proximal humerus fracture, identifying and protecting the axillary nerve is paramount. At what distance distal to the lateral acromial edge does the main trunk of the axillary nerve typically cross the humerus?

Figure 25 details the anterior thigh musculature.

A patient requires a femoral nerve block. Which of the following accurately describes the position of the femoral nerve within the femoral triangle?

During an anterior intrapelvic (modified Stoppa) approach for an acetabular fracture, significant hemorrhage occurs near the superior pubic ramus. The most likely source is the corona mortis, which represents an anastomosis between:

A surgeon is performing a lateral transpsoas approach to the L4-L5 disc space. To avoid injury to the lumbar plexus, the retractor should be placed carefully, as the nerve responsible for quadriceps function is located in which region of the psoas muscle at this level?

During placement of an S1 iliosacral screw for a displaced sacral fracture, an anterior extraosseous screw trajectory risks injuring which neural structure passing over the sacral ala?

In performing an arthroscopic repair of a Bankart lesion, the surgeon places suture anchors at the 3, 4, and 5 o'clock positions on the glenoid (in a right shoulder). Which nerve is most at risk if the drill penetrates the anteroinferior glenoid neck too deeply?

A 30-year-old male presents to the emergency department following an acute knee dislocation (Schenck KD-III). Vascular exam is normal, but he exhibits a complete foot drop and inability to extend his toes. Which nerve is injured, and at what anatomic site is it most commonly tethered during this injury?

What is the most common nerve-related complication following hip arthroscopy due to portal placement and limb traction?

The medial femoral circumflex artery (MFCA) provides the primary blood supply to the femoral head. During a posterior approach to the hip, protecting this artery is critical. Which of the following anatomic landmarks best identifies the location of the deep branch of the MFCA?

During an anterior ilioinguinal approach for an acetabular fracture, the surgeon must identify and ligate the corona mortis to prevent life-threatening hemorrhage. The corona mortis represents an anastomosis between which two vascular systems?

The Smith-Petersen approach to the hip utilizes a true internervous plane. Which of the following accurately describes the muscular and neurologic intervals for the superficial dissection?

A patient with a posterior hip dislocation subsequently develops a sciatic nerve palsy. Which component of the sciatic nerve is most frequently and severely injured in this scenario, and what is the primary clinical manifestation?