The Wristalyzer wrist perturbator

history

-   Belgian doctor with vision.

spec and requirements

-   Tardieu test for spasticity.

-   high bandwidth, low friction.

-   maybe admittance was not the right choice.

-   feedforward friction compensation worked well.

hand grip

-   soap block handle.

spin-off for the ankle

-   Ankleman ( Achilles ) ankle perturbator.

MRI

-   MRI version is currently ( 2026 ) under development.