1. General Principles & Basic Science MCQs

During an anterior approach to the hip (Smith-Petersen), careful hemostasis is required as major vessels are encountered traversing the surgical interval. The ascending branch of the lateral femoral circumflex artery crosses between which two muscles?

During a deltopectoral approach to the shoulder for a fracture dislocation, you must identify the boundaries of the quadrangular space to protect the axillary nerve. Which of the following constitutes the superior boundary of this space?

A patient with adult-acquired flatfoot deformity requires a repair of the spring ligament complex. Which of the following bands of the spring ligament is the primary stabilizer of the talar head and longitudinal arch?

During an anterior intrapelvic (modified Stoppa) approach for an acetabular fracture, significant hemorrhage occurs near the superior pubic ramus. This is most likely due to injury to an anastomotic vessel (corona mortis) communicating between the obturator vessels and the:

A 28-year-old overhead athlete presents with insidious posterior shoulder pain and isolated weakness in external rotation. An MRI reveals a paralabral cyst located within the quadrangular space compressing the traversing nerve. Which of the following anatomic structures forms the inferior boundary of this space?

A 45-year-old carpenter presents with a 4-month history of deep, aching pain in his proximal dorsal forearm and progressive weakness in extending his index and middle fingers. On examination, wrist extension is maintained but demonstrates radial deviation. Which of the following anatomic structures is the most common site of compression for the affected nerve?

A 55-year-old male sustains an unstable pelvic ring injury. An anterior ilioinguinal approach is utilized for open reduction and internal fixation. During dissection along the superior pubic ramus, brisk arterial hemorrhage is encountered. This bleeding most likely originates from the 'Corona Mortis,' which represents an anastomosis between the obturator artery and which of the following vessels?

A surgeon is performing a posterolateral approach to the distal tibia for fixation of a complex posterior malleolus fracture. To utilize a true internervous plane, the deep surgical dissection should occur between which of the following two muscle bellies?

During a surgical approach to the hip for internal fixation of a basicervical femoral neck fracture, the surgeon must exercise extreme caution to preserve the primary blood supply to the adult femoral head. Which of the following is the predominant source of this vascularity?

A 28-year-old professional volleyball player presents with insidious onset of vague posterior shoulder pain and paresthesias over the lateral deltoid. MRI of the shoulder demonstrates isolated atrophy of the teres minor muscle. Pathology within the quadrilateral space is suspected. Which structures traverse this anatomical space?

A surgeon is performing the volar (Henry) approach to the radius to fix a midshaft radius fracture. During the proximal superficial dissection, an internervous plane is developed. Which nerves supply the two muscles forming the boundaries of this proximal internervous plane?

In the distal extension of the anterolateral approach to the humerus, the brachialis muscle is split to expose the humeral shaft. What is the neurological basis that permits a safe, longitudinal split in the middle or lateral third of the brachialis muscle?

During an ilioinguinal approach for the internal fixation of an anterior column acetabular fracture, the surgeon dissects near the superior pubic ramus and must be careful to ligate the 'corona mortis.' This structure represents an anastomosis between which two vascular systems?

A 35-year-old male presents with right shoulder pain and weakness after a direct blow to the posterior shoulder. On examination, he has weakness in external rotation and abduction. An MRI shows isolated atrophy of the teres minor. Which of the following anatomic borders defines the space through which the affected nerve passes?

A 32-year-old runner develops medial midfoot pain and numbness radiating to the plantar aspect of the hallux. Conservative management fails, and surgical exploration is planned. The surgeon targets the area near the 'Master Knot of Henry.' Which of the following describes the anatomical relationship at this location?

An orthopedic surgeon is performing an anterior (ilioinguinal) approach for the fixation of an anterior column acetabular fracture. While dissecting along the posterior aspect of the superior pubic ramus, brisk, difficult-to-control arterial bleeding is encountered. This bleeding is most likely originating from an anastomotic vessel connecting which two vascular systems?

A patient sustains a penetrating trauma to the anterior arm, resulting in inability to flex the elbow and loss of sensation over the lateral aspect of the forearm. The injured nerve is a terminal branch of which cord of the brachial plexus, and it typically pierces which muscle?

A 45-year-old male is undergoing open reduction and internal fixation of a proximal humerus fracture via an anterolateral (deltoid-splitting) approach. The surgeon must be careful to avoid iatrogenic injury to the axillary nerve. Which of the following best describes the typical anatomic distance of the axillary nerve distal to the lateral edge of the acromion?

A 35-year-old male is undergoing open reduction and internal fixation of an anterior column acetabulum fracture via an ilioinguinal approach. The surgeon is working primarily through the 'middle window' to visualize the pelvic brim. Which structures define the medial and lateral borders of this surgical window?

During an anterolateral approach to the distal humerus, the radial nerve is at risk. Which of the following describes the correct anatomical plane and location to identify the radial nerve in this region?