Interactive Tool
Position & the Spinal Canal
Educational posture model
Toggle the structural changes behind stenosis, then switch posture to see why the same spine can feel so different standing up versus leaning forward. This is educational only, not a measurement of your own spine.
Get medical care right away for new or quickly worsening leg weakness, numbness in the groin or saddle area, or new trouble with your bladder or bowels.
Live Simulation
Severe Canal Compromise
Patient · Side View
● In Motion
Sagittal View · Lumbar Canal
Press Walking, Lean Forward, and Seated to watch the spinal canal narrow and open. Standing extends the spine and can narrow the space around the nerves; leaning forward flexes it and often gives them more room.
What this illustrates: —
Underlying Structural Narrowing — choose features in the model
The drawing illustrates a possible effect of posture. It does not measure canal size, diagnose severity, or predict walking distance. Learn more from AAOS.