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Figure 3 | BMC Musculoskeletal Disorders

Figure 3

From: New physical examination tests for lumbar spondylolisthesis and instability: low midline sill sign and interspinous gap change during lumbar flexion-extension motion

Figure 3

Lumbar lateral radiograph showing low midline sill. Lumbar lateral radiograph of a 47-year-old female with spondylolytic spondylolisthesis (A). Explanation of the radiograph. The box indicates grade I spondylolytic spondylolisthesis at the L5-S1 level. A sill is shown between the L4-5 interspinous space when drawing a line connecting the spinous processes of the lumbar spine (B).

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