Enter the findings from your report and see where they sit on the spine, and which nerve root they may touch.

Findings

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Posture of the spine

Change the three curves of the spine and see how vertebrae, cord and roots follow.

Cervical lordosis C2-C7

Thoracic kyphosis T4-T12

Lumbar lordosis L1-S1

Bending

ForwardBackward

Share of each level's usual range of motion (neck: Wu 2007; thoracic: Morita 2014; low back: Dvořák 1991). Bending backward narrows the foramina where the roots exit: in the low back their area shrinks by about 15% (Inufusa 1996).

Angles are approximate, measured on this model. The change is spread over the levels as in a real spine: in the low back mostly at L4-L5 and L5-S1. On MRI, taken lying down, the neck shows about 5° less curve than standing (Sevin 2025). A straight neck is common in people without neck pain and is not linked to pain or disability (Grob 2007), nor is it a sign of muscle spasm (Helliwell 1994). Thoracic kyphosis over 40° is the usual cut for hyperkyphosis, about the top 5% in young adults (Fon 1980). For the low back there is no fixed cut: standing values are around 45-60° (Vialle 2005, Benditz 2017) and doctors judge them against the shape of the pelvis (pelvic incidence). The two lumbar presets are examples, not diagnoses.

Scoliosis

Try a side curve of the spine, with the turn of the vertebrae that comes with it.

A spine counts as scoliotic from a Cobb angle of 10°, measured on a standing frontal X-ray (SRS). Curve regions follow Lenke 2001, simplified to three patterns; the span of each curve is typical, not a rule. Rotation classes are from Aubin 2025. Rotation and Cobb angle vary from person to person: a third is a rough starting point, close to the values in Brink 2019. Vertebrae turn towards the outside of the curve, most at the apex. This is a shape study, not a diagnosis, and it does not forecast how a curve evolves. Vertebrae stay rigid here, while in real curves they become wedge shaped, so large curves are only indicative and the slider stops at 70°. The ribs are not in the model, so there is no rib hump, and the narrowing of the foramina on the inner side is not simulated: the roots shown here follow the vertebrae and say nothing about nerve pressure. The posture sliders read the curves before the scoliosis; the figures on the image are measured on the deformed spine.

Click a vertebra or disc to see it up close. Drag to rotate, scroll or pinch to zoom, right-click or two fingers to pan. Double-click empty space to reset the view.

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