What you see as a “valgus knee” may be a vestibular leak.

You strengthen the abductors.
You mobilize the hips.
You seek knee/foot alignment.

But despite all that… the knee still collapses.

What if the problem wasn't peripheral, but central?

The role of the vestibulo-spinal reflex

Most tonic asymmetries stem from there: the vestibulo-spinal reflex.

This reflex, driven by the vestibular nuclei and the brainstem, determines the lateral tonic activation of postural muscles.

When it is poorly calibrated, you observe:

• an asymmetry in axial tone (trunk rotation/translation),
• a leak in the motor pattern (valgus, persistent internal rotation),
• an “anticipated” compensation strategy in the motor loop.

Why classic tests are not enough

No classic clinical test allows you to see this.
Because:

• the muscle tone test does not assess the source,
• and strengthening teaches nothing to the vestibular system.

What we observe every week with our students

• ✅ A simple calibration of the semicircular canals → immediate rebalancing of axial tone.
• ✅ Training of the vestibulo-spinal reflex → reorganization of lateral chains, without voluntary instruction.
• ✅ A test-retest on motor patterns → movements that align without external constraint.

Conclusion

This is the paradigm shift.