What is the term for forward displacement of one vertebra upon the one beneath it?

• A. Scoliosis
• B. Kyphosis
• C. Spondylolisthesis
• D. Lordosis

Answer: (C)

The term for forward displacement of one vertebra upon the one beneath it is indeed spondylolisthesis. This condition occurs when a vertebra slips out of its normal position, typically due to degenerative changes in the spine or a stress fracture. Symptoms may include back pain and nerve compression, depending on the severity of the displacement. Spondylolisthesis can affect spinal stability and may require treatment ranging from conservative management to surgical intervention, depending on the degree of slip and associated symptoms. Understanding this term is particularly important in radiographic assessments, as it can significantly influence treatment plans and overall patient outcomes.