1. General Principles & Basic Science MCQs

During a surgical approach to the midfoot for an accessory navicular excision, the surgeon identifies a tendinous crossover beneath the navicular. At this location, known as the Master Knot of Henry, which anatomical relationship is correct?

The volar approach to the proximal radius (Henry approach) requires dissection between two muscles to expose the supinator. Which of the following nerves innervates the muscle forming the medial border of this proximal internervous plane?

During the Smith-Petersen (anterior) approach to the hip, which internervous interval is utilized superficially?

Hypertrophy of the teres minor, teres major, long head of the triceps, and the surgical neck of the humerus creates a tight quadrangular space. Which of the following structures are at highest risk of compression?

The volar (Henry) approach to the proximal radius utilizes an internervous interval between which two muscles?

The anterior approach to the hip (Smith-Petersen) utilizes a superficial internervous plane between two muscles. Which of the following nerves innervate these two muscles?

When performing an anterolateral approach to the distal humerus, the radial nerve is at risk. Approximately how far proximal to the radiocapitellar joint does the radial nerve piece the lateral intermuscular septum?

The extended volar approach to the radius (Henry approach) requires dissection between the flexor carpi radialis (FCR) and the brachioradialis. Which nerve innervates the muscle forming the lateral border of this interval?

A patient presents with isolated weakness in elbow flexion and decreased sensation over the lateral forearm following a traction injury. The affected nerve is formed by which cords of the brachial plexus?

During the ilioinguinal approach for an anterior column acetabular fracture, significant hemorrhage occurs behind the superior pubic ramus. This is most likely due to an injury to the "corona mortis", which represents an anastomosis between the:

When performing a posteromedial approach to the knee to repair the posterior horn of the medial meniscus, the sartorius fascia must be incised. Which of the following correctly identifies the anterior-to-posterior arrangement of the pes anserinus tendons?

During the anterior (Henry) approach to the proximal radius, the surgeon must mobilize a specific muscle to protect the posterior interosseous nerve. Supination of the forearm helps move this nerve away from the surgical field. Which muscle envelops the nerve and is carefully retracted?

A surgeon performs a standard anterior (Smith-Petersen) approach to the hip for a pelvic osteotomy. The internervous plane utilized is between muscles innervated by which two nerves?

During a posterior approach to the humerus for fracture fixation, the radial nerve is identified. As it courses distally, it pierces the lateral intermuscular septum to enter the anterior compartment of the arm. On average, at what distance proximal to the lateral epicondyle does this transition occur?

A surgeon is performing an anterior (Smith-Petersen) approach to the hip for a core decompression. To safely develop the internervous plane, the initial superficial dissection should proceed between muscles innervated by which two nerves?

When executing a posterior approach to the shoulder to address glenoid pathology, the surgeon splits the deltoid and then develops an internervous plane between the infraspinatus and teres minor. Which nerve provides motor innervation to the teres minor?

In the proximal portion of the volar (Henry) approach to the forearm, the internervous plane is developed between the brachioradialis and the pronator teres. Which critical nerve structure must be identified and protected as it courses deep to the brachioradialis in this region?

While performing an ilioinguinal approach for a complex anterior column acetabular fracture, massive hemorrhage occurs near the superior pubic ramus. This is most likely due to an inadvertent injury to an arterial anastomosis between which two vascular systems?

An anterior approach to the cubital fossa is performed to repair a distal biceps tendon rupture. Proximal dissection is carried out to expose the deep structures. The radial nerve is typically located between which two muscles in the proximal aspect of this exposure?

During an anterior retroperitoneal approach to the L4-L5 intervertebral disc, lateral mobilization of the great vessels is required. To safely retract the common iliac vessels medially, which structure is routinely identified and ligated?