Surgical Anatomy & Approaches MCQs

During an ilioinguinal approach to the acetabulum, the surgeon must ligate the corona mortis to prevent massive hemorrhage. This structure is an anastomosis between which two vascular systems?

When performing a deltoid-splitting surgical approach to the shoulder, the axillary nerve is typically found at what approximate distance distal to the lateral edge of the acromion?

The "corona mortis" is a significant anatomic structure encountered during the ilioinguinal approach to the acetabulum. It represents a vascular anastomosis between which two systems?

The short head of the biceps femoris muscle plays a unique anatomical role in the posterior compartment of the thigh. It receives its motor innervation from which of the following nerves?

During a deltopectoral approach for shoulder arthroplasty, the conjoined tendon is retracted medially. The nerve that pierces the coracobrachialis muscle typically enters it at what distance distal to the coracoid process?

During a direct lateral (Hardinge) approach to the hip, proximal extension of the gluteus medius split is typically limited to 3-5 cm superior to the greater trochanter to prevent injury to which nerve?

An orthopedic surgeon is performing an anterior ilioinguinal approach for an acetabular fracture. Severe hemorrhage is encountered near the superior pubic ramus. This bleeding is most likely from an anastomotic vessel connecting which two arterial systems?

The anterolateral (Watson-Jones) approach to the hip utilizes a superficial interval between the tensor fasciae latae and the gluteus medius. What is the innervation of these two muscles respectively?

During a deltopectoral approach to the shoulder, the coracoid process may be osteotomized to improve exposure. The surgeon must be careful to avoid placing retractors too distally on the conjoined tendon to prevent injury to which nerve?

When performing the volar (Henry) approach to the proximal radius, the surgeon develops the interval between the pronator teres and the brachioradialis. Which vascular structure must be ligated and divided to fully mobilize the mobile wad laterally?

A patient develops weakness of the deltoid and teres minor following a posterior shoulder dislocation. The injured nerve passes through the quadrangular space. What muscle forms the superior border of this anatomic space?

During a lateral transpsoas approach to the lumbar spine (LLIF), the surgeon must navigate the lumbar plexus carefully to avoid neurologic deficit. Which nerve is classically found emerging directly from the anterior surface of the psoas major muscle?

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

During a posterior approach to the hip (Moore or Southern), the short external rotators are tenotomized and reflected posteriorly. Which structure is most at risk if the piriformis is not carefully protected, specifically considering common anatomical variants?

When performing a direct lateral (deltoid-splitting) approach to the proximal humerus for open reduction and internal fixation, what is the maximum safe distance from the tip of the acromion to extend the split without risking denervation of the anterior deltoid?

When performing an anterior approach to the hip (Smith-Petersen), the superficial internervous plane is between the sartorius and tensor fasciae latae (TFL). Which nerve innervates the muscle forming the medial border of this interval?

When placing half-pins for a humeral external fixator from a lateral approach, the radial nerve is at risk. At what location does the radial nerve predictably pierce the lateral intermuscular septum to enter the anterior compartment?

During an arthroscopic rotator cuff repair, a portal is established posterior to the acromioclavicular joint. If the portal or dissection is extended more than 5 cm inferiorly from the lateral acromion edge, which nerve is at greatest risk of injury?

During an ilioinguinal approach to the acetabulum, severe hemorrhage is encountered while dissecting posterior to the superior pubic ramus. This is most likely due to an unligated vascular anastomosis between which two systems?

A patient undergoes a lateral transpsoas interbody fusion at L4-L5. Postoperatively, they display profound weakness in hip flexion and knee extension, along with anterior thigh numbness. Which nerve was most likely injured?