6. Spine MCQs

Which region of the normal adult spine typically acts as a transition zone and is generally considered straight (zero degrees) in the sagittal plane?

On an anteroposterior (AP) radiograph of the lumbar spine, the pedicles of which vertebra are normally most widely separated?

In evaluating coronal balance on full-length standing spine radiographs, the Central Sacral Vertical Line (CSVL) is drawn vertically from which starting point?

In the functional spinal unit of the normal lumbar spine, where is the instantaneous axis of rotation (IAR) located during flexion-extension?

According to the Meyerding grading system for spondylolisthesis, a slip of 60% of the superior vertebral body over the inferior vertebral body is classified as:

What is the fundamental mathematical relationship between Pelvic Incidence (PI), Pelvic Tilt (PT), and Sacral Slope (SS) in spino-pelvic alignment?

When surgically correcting adult spinal deformity, which of the following postoperative spino-pelvic parameters is associated with the best health-related quality of life (HRQOL) scores according to the SRS-Schwab criteria?

In a normal healthy adult, what percentage of the total lumbar lordosis is typically distributed between the L4 and S1 segments?

A 65-year-old patient presents with a progressive positive sagittal vertical axis (SVA). Which of the following represents the body's initial primary compensatory mechanism to maintain horizontal gaze and standing balance?

Which of the following parameters is used to assess the spino-pelvic equivalent for the cervical spine, helping to determine the ideal cervical lordosis and risk of adjacent segment disease?

What is the classic Sorensen radiographic criteria for diagnosing Scheuermann's kyphosis?

In patients with developmental L5-S1 high-grade spondylolisthesis, which spino-pelvic parameter is characteristically significantly elevated compared to the normal population?

A patient with Ankylosing Spondylitis is undergoing preoperative planning for a lumbar osteotomy to correct severe fixed kyphosis. Which of the following clinical measurements is most critical for determining the required degree of correction to restore horizontal gaze?

When treating an adolescent with a Lenke 1A curve, fusing down to the stable vertebra is historically considered. How is the stable vertebra defined on a standing PA radiograph?

Which of the following is considered a significant risk factor for the development of Proximal Junctional Kyphosis (PJK) following long posterior spinal fusion for adult deformity?

A 14-year-old gymnast complains of lower back pain aggravated by extension. Plain radiographs are negative. Which imaging modality has historically been considered the gold standard for detecting an acute, metabolically active pars interarticularis stress fracture?

A 72-year-old female with adult spinal deformity requires a long segment fusion. Her DEXA scan reveals a T-score of -3.2. To maximize pedicle screw pull-out strength, which surgical modification is most effective?

In evaluating a patient with cervical myelopathy, the C2-C7 Sagittal Vertical Axis (SVA) is measured. A value greater than which of the following thresholds is most strongly correlated with poor clinical outcomes and increased neck pain?

Which of the following vertebral anomalies carries the highest risk of rapid curve progression in congenital scoliosis?