1. General Principles & Basic Science MCQs

During a transforaminal lumbar interbody fusion (TLIF) at L4-L5, the surgeon utilizes Kambin's triangle to access the disc space safely. Which structure constitutes the anterior/hypotenuse border of Kambin's triangle?

When evaluating a patient for meniscal repair, the vascular zone of the meniscus is critical. Which vessels provide the primary blood supply to the peripheral genicular capsular attachments of the menisci?

A 28-year-old professional baseball pitcher presents with vague right posterior shoulder pain and progressive weakness in external rotation. MRI reveals isolated atrophy of the teres minor muscle with a paralabral cyst in the anatomic space transmitting the axillary nerve. Which of the following structures forms the superior border of this specific anatomic space?

During the ilioinguinal approach for open reduction and internal fixation of an anterior column acetabular fracture, brisk arterial bleeding is encountered superior to the superior pubic ramus. This hemorrhage is most likely originating from an anatomic variant vascular connection between the obturator vessels and which of the following?

A spine surgeon is utilizing a lateral transpsoas approach to perform an interbody fusion at L4-L5. Postoperatively, the patient has profound weakness in hip flexion and knee extension, alongside anterior thigh numbness. Which neural structure was most likely injured or compressed during retraction of the posterior third of the psoas muscle?

Hypertrophy of the teres minor and the long head of the triceps brachii can lead to nerve compression within the quadrangular space. Which of the following clinical findings would most likely be observed in this scenario?

During an ilioinguinal approach to the acetabulum, massive bleeding is encountered posterior to the superior pubic ramus. This bleeding is most likely originating from the 'corona mortis', which represents an anastomosis between which two vascular systems?

A surgeon is performing a complex midfoot reconstruction and explores the plantar aspect of the navicular. At the 'master knot of Henry', which of the following tendons crosses superior (dorsal) to the flexor digitorum longus (FDL) tendon?

In an adult patient, which of the following branches of the medial femoral circumflex artery provides the primary blood supply to the weight-bearing dome of the femoral head?

During an anterolateral approach to the distal tibia, a nerve is at risk of being injured where it transitions from deep to subcutaneous tissue. At what location does the superficial peroneal nerve typically pierce the deep crural fascia?

The volar approach to the proximal forearm (Henry approach) utilizes a safe internervous plane. Which of the following pairs of nerves supplies the two muscles that define this plane?

While performing a lateral (Hardinge) approach to the hip, the surgeon must limit the proximal splitting of the gluteus medius muscle to no more than 3 to 5 cm above the greater trochanter. This precaution primarily protects which of the following structures?

During an ilioinguinal approach to the acetabulum, brisk bleeding is encountered just posterior to the superior pubic ramus. This bleeding is most likely originating from an anastomosis between which two vessels?

At the level of the "Master Knot of Henry" in the plantar aspect of the midfoot, what is the anatomical relationship between the flexor hallucis longus (FHL) and flexor digitorum longus (FDL) tendons?

Which of the following nerves exits the adductor (Hunter's) canal by piercing the vastoadductor fascia?

The posterior interosseous nerve (PIN) is most vulnerable to iatrogenic injury during a Henry approach to the proximal radius at which of the following anatomic structures?

The axillary nerve passes through the quadrangular space. What muscle forms the inferior border of this space?

In approximately 10-15% of the population, a variation in the relationship between the sciatic nerve and the piriformis muscle exists. What is the most common anatomical variant?

The genicular arteries provide blood supply to the menisci of the knee. In an adult, vascular penetration extends to approximately what depth of the meniscus?

When utilizing the direct lateral (Hardinge) approach to the hip, what is the generally accepted "safe zone" for proximal splitting of the gluteus medius to avoid injury to the superior gluteal nerve?