SVV simulator
Drag a luminous line in a featureless dark surround until it looks vertical. Select a disease preset to see typical tilt magnitudes from the literature.
Healthy adult, within ±2°.
Click or tap and drag the line until you perceive it as vertical. Arrow keys nudge by 0.5°; shift+arrow nudges by 5°. Select a disease preset to see typical tilt magnitudes from the literature.
How to use it
The simulator presents a luminous line on a black background — a software analogue of the bucket or hemispheric dome paradigm. Click and drag the line to rotate it; arrow keys nudge by 0.5° (shift-arrow by 5°); pressing ‘0’ resets to true vertical.
Picking a disease preset reveals the typical tilt magnitude reported in peer-reviewed series for that condition. These are illustrative values, not patient data; real measurements vary with chronicity, dominant nerve division, age, and method.
For trainees: estimate the tilt by eye before revealing the angle. For teaching rounds: run a blinded session — present the line at a preset value and ask the group to call the lesion level (peripheral vs pontomedullary vs pontomesencephalic).