Which finding is not typically demonstrated by MRI in the evaluation described for disc pathology?

• A. Disc bulge
• B. Nerve root compression
• C. Objective functional localization
• D. Spinal stenosis

Answer: (C)

MRI in disc pathology is about visualizing the structure: it shows disc bulges or herniations, nerve root compression, and spinal canal or foraminal narrowing due to degenerative changes. These are anatomical findings that MRI can depict clearly. The phrase “objective functional localization” refers to pinpointing the source of symptoms based on function, movement, or provocative testing, which is determined clinically or with functional studies—not something MRI provides directly. So, the feature not typically demonstrated by MRI is objective functional localization; MRI can show the physical structures that might explain symptoms but not how those structures behave functionally during activity.