8. Foot and Ankle MCQs

A 55-year-old overweight female presents with progressive flattening of her right foot, medial ankle pain, and an inability to perform a single-leg heel raise. MRI confirms severe tendinopathy and elongation of a key medial stabilizing structure. Dysfunction of which of the following tendons is the primary driver of this adult-acquired flatfoot deformity?

A 40-year-old male sustains a deep laceration to the dorsal aspect of the first web space of his foot. He reports profound numbness in the area immediately surrounding the laceration. Which of the following nerves is responsible for the sensory deficit in this specific anatomical region?

A 68-year-old female presents with medial forefoot pain and difficulty with shoe wear. Examination reveals a prominent medial eminence and lateral deviation of the great toe. When counseling the patient on the epidemiology of her condition, which of the following statistics is most accurate regarding the prevalence of this deformity in adults over the age of 65?

A 34-year-old male sustains a high-energy motor vehicle collision resulting in a severely comminuted fracture of the central bone of the proximal foot articulation. The surgeon plans for open reduction and internal fixation. During the approach and mobilization of the fracture fragments, the surgeon must be mindful of the bone's unique anatomical characteristics. Which of the following is a distinguishing feature of the primary bone involved in transmitting forces from the leg to the foot?

A 45-year-old marathon runner presents with chronic lateral ankle pain and weakness during push-off. MRI reveals a high-grade partial tear of a tendon that passes posterior to the lateral malleolus and courses under the cuboid. In addition to hindfoot eversion, what is the primary biomechanical function of this specific tendon in the forefoot?

A 55-year-old female presents with a progressive flatfoot deformity and medial midfoot pain. Clinical examination demonstrates a 'too many toes' sign and an inability to perform a single-leg heel raise. While posterior tibial tendon dysfunction is the primary dynamic driver, secondary failure of static stabilizers often occurs. According to the provided text, which of the following ligamentous structures is most critical for directly supporting the talar head and maintaining the medial longitudinal arch?

A biomechanics researcher is analyzing the gait cycle of a healthy adult. During the terminal stance phase, the hindfoot inverts, which subsequently alters the alignment of the midfoot articulations to create a rigid lever for propulsion. Which of the following joints is primarily responsible for this locking and unlocking mechanism of the midfoot?

A 22-year-old collegiate soccer player sustains an external rotation injury to his right ankle. Radiographs show no fracture, but there is widening of the medial clear space on stress views. The physician suspects a complex soft tissue injury involving the tibiofibular syndesmosis and the deltoid ligament. Which of the following imaging modalities is considered the preferred method for directly evaluating the integrity of these specific soft tissue structures?

A 40-year-old male undergoes surgical fixation for a bimalleolar equivalent ankle fracture. The surgeon begins by addressing the displaced lateral malleolus fracture. After debriding the fracture hematoma, anatomical reduction is achieved using a reduction clamp. According to the surgical principles outlined in the text, why is the precise restoration of fibular length considered a critical step during this portion of the procedure?

An orthopedic resident is reviewing the medial ligamentous stabilizers of the ankle prior to assisting in a complex ankle reconstruction. The attending asks the resident to identify the components of the deep layer of the deltoid ligament, which provides significant medial stability. Which of the following pairs of ligaments constitutes the deep layer of the deltoid ligament?

A 45-year-old marathon runner presents with midfoot pain and a noticeable decrease in running efficiency. Biomechanical gait analysis reveals a failure of the midfoot to transition into a rigid lever during the push-off phase of the gait cycle. Which of the following joint complexes is primarily responsible for this specific biomechanical transition?

A 32-year-old male undergoes open reduction and internal fixation of a displaced lateral malleolus fracture via a standard anterolateral approach. Postoperatively, he complains of numbness over the dorsum of his foot, but sensation in the first dorsal web space remains intact. Motor function of the anterior compartment is normal. Which of the following structures was most likely injured during the surgical exposure?

A 55-year-old female presents with a progressive foot deformity. Clinical examination reveals a flexible cavovarus foot. The treating orthopedic surgeon suspects that overactivity of a specific laterally-based tendon is contributing to the plantarflexion of the first ray. Which of the following tendons is primarily responsible for this action?

A 30-year-old construction worker falls from a height, sustaining an isolated, highly comminuted fracture of a hindfoot bone. The orthopedic surgeon counsels the patient on the high risk of avascular necrosis due to the bone's unique anatomical characteristic of having no muscular or tendinous attachments. Which of the following bones is fractured?

A 40-year-old hiker complains of difficulty walking on uneven terrain following a severe hindfoot injury sustained six months ago. Clinical evaluation demonstrates a significant loss of hindfoot inversion and eversion, while dorsiflexion and plantarflexion are relatively preserved. Which of the following joints, which normally functions as a "mobile adaptor," is most likely compromised?

A 58-year-old female presents with a painful, progressive flatfoot deformity. Clinical examination reveals weakness in inversion and a positive single-leg heel raise test. MRI demonstrates tendinopathy of the posterior tibial tendon and severe attenuation of the primary passive ligamentous stabilizer of the talar head and medial longitudinal arch. Which of the following ligaments is most likely attenuated?

A 35-year-old male is undergoing operative fixation for a bimalleolar equivalent ankle fracture. During the reduction of the lateral malleolus, the surgeon emphasizes the critical importance of restoring the exact anatomical length of the fibula. Failure to restore fibular length will most directly result in which of the following biomechanical consequences?

A 25-year-old male presents with a foot drop and numbness isolated to the dorsal aspect of the first web space following a traumatic knee dislocation. An EMG confirms a nerve injury. Which of the following nerves, which bifurcates from the common peroneal nerve, is responsible for these specific motor and sensory deficits?

A 50-year-old female undergoes surgical exploration of the medial ankle following a complex pronation-external rotation fracture-dislocation. The surgeon identifies a complete rupture of the robust medial ligamentous complex. To restore maximal medial stability to the ankle mortise, the surgeon focuses on repairing the deep layer of this complex. Which of the following specific bands is a component of this deep layer?

A 38-year-old recreational athlete is undergoing percutaneous repair of an acute Achilles tendon rupture. To avoid iatrogenic nerve injury during suture passage, the surgeon must be aware of the sural nerve's anatomical course. At approximately what distance proximal to the calcaneal insertion does the sural nerve typically cross the lateral border of the Achilles tendon?