Surgical Anatomy & Approaches MCQs

A surgeon performs a total hip arthroplasty utilizing the direct anterior approach (Smith-Petersen interval). This surgical approach exploits a true internervous plane between muscles innervated by which two nerves?

A 22-year-old female undergoes a Bernese periacetabular osteotomy (PAO) for symptomatic hip dysplasia. Postoperatively, she demonstrates weakness in ankle dorsiflexion and great toe extension. Which nerve was most likely injured during the procedure?

Which physical examination test is typically used to assess for sacroiliac joint pain?

A 6-year-old boy presents with a displaced supracondylar humerus fracture. Examination reveals an inability to flex the interphalangeal joint of the thumb and the distal interphalangeal joint of the index finger. Which of the following represents the second most common nerve palsy associated with this specific fracture pattern?

During the anterior (Smith-Petersen) approach to the hip, the internervous plane is developed between the sartorius and the tensor fascia lata. Which of the following vascular structures crosses this interval and must be routinely identified and ligated to prevent significant hemorrhage?

During an anterior (Smith-Petersen) approach to the hip, the internervous plane is developed between the sartorius and the tensor fascia lata. Which of the following vascular structures crosses this interval and must be routinely identified and ligated to prevent significant hemorrhage?

During the anterior (Smith-Petersen) approach to the hip, the internervous plane is developed between the sartorius and the tensor fascia lata. Which of the following vascular structures crosses this interval and must be routinely identified and ligated to prevent significant hemorrhage?

A surgeon is performing an anterolateral approach to the distal fibula for a complex pilon fracture extension. To safely expose the bone while minimizing denervation, the surgeon utilizes an internervous plane. This plane separates muscles innervated by which of the following nerve pairs?

When utilizing the standard anterolateral approach to the distal fibula for fracture fixation, the surgeon dissects through an internervous plane to minimize denervation of the surrounding musculature. This plane lies between which of the following muscle compartments?

A surgeon is performing an anterolateral approach to the distal fibula for fracture fixation. The deep dissection utilizes an internervous plane between the anterior and lateral compartments of the leg. Which of the following pairs of nerves innervates the muscles that define this internervous plane?

A 28-year-old male is undergoing open reduction and internal fixation of a displaced lateral malleolus fracture. The surgeon utilizes a standard longitudinal incision centered over the distal fibula. During the superficial dissection, a nerve is identified crossing the surgical field. To safely execute the internervous plane between the anterior and lateral compartments, which nerve must be meticulously protected, and what is its typical anatomical position relative to the fibula in this exposure?

A 6-year-old boy falls from monkey bars and sustains a widely displaced, extension-type pediatric supracondylar humerus fracture. The distal fragment is displaced posteromedially. Which nerve is most likely to be injured in this specific fracture pattern?

A 6-year-old boy sustains a displaced extension-type supracondylar humerus fracture after falling from monkey bars. Radiographs demonstrate that the distal fragment is displaced posteromedially. Which nerve is at the greatest risk of injury in this specific displacement pattern?

A 65-year-old male presents with massive, ulcerated, chalky white tophaceous deposits over his olecranon and PIP joints, causing severe mechanical restriction and recurrent secondary infections. Initial surgical management of these symptomatic lesions primarily involves:

A delay in the surgical drainage of septic coxitis in an infant can lead to devastating sequelae due to increased intra-articular pressure and bacterial chondrolysis. Which of the following structures is at highest immediate risk of irreversible ischemic necrosis?

The primary blood supply to the adult femoral head is derived from the medial circumflex femoral artery (MCFA). Which specific branch of the MCFA provides the majority of this perfusion, and what is its anatomical relationship to the hip joint?

A 25-year-old male sustains a posterior hip dislocation in a motor vehicle collision. He subsequently demonstrates a foot drop. Which specific neural structure is most likely injured?

The anterolateral approach to the distal fibula utilizes an internervous plane between muscles supplied by which of the following nerves?

When performing an anterolateral approach to the distal fibula, the surgeon utilizes an internervous plane between the anterior and lateral compartments. Which two nerves supply the musculature defining this interval?

When performing an anterolateral approach for open reduction and internal fixation of a lateral malleolus fracture, the surgeon utilizes an internervous plane. Between which two muscle compartments does this plane lie, and which nerve is at greatest risk during the superficial dissection?