What is the normal range for the lumbar lordotic curve?

What is the normal range for the lumbar lordotic curve?

• A. 40-60 degrees
• B. 0-20 degrees
• C. 20-40 degrees
• D. Greater than 60 degrees

Answer: (A)

Lumbar lordosis is the inward curve of the lower spine when viewed from the side. In adults, the typical amount of this curve on a lateral radiograph is about 40 to 60 degrees. This range represents normal sagittal balance and spinal alignment in a standing, neutral posture, allowing efficient load distribution through the lumbar region. Values below this range suggest a flatter back (hypolordosis), while values above it indicate excessive inward curvature (hyperlordosis) and potential strain on the posterior elements. Therefore, 40–60 degrees is the standard normal range.

Lumbar lordosis is the inward curve of the lower spine when viewed from the side. In adults, the typical amount of this curve on a lateral radiograph is about 40 to 60 degrees. This range represents normal sagittal balance and spinal alignment in a standing, neutral posture, allowing efficient load distribution through the lumbar region. Values below this range suggest a flatter back (hypolordosis), while values above it indicate excessive inward curvature (hyperlordosis) and potential strain on the posterior elements. Therefore, 40–60 degrees is the standard normal range.