The lunotriquetral shear test or lunotriquetral shear maneuver involves stabilizing the lunate between thumb and index finger of one hand and the triquetrum between the thumb and index finger of the other.
To perform a lunotriquetral shear test, you stabilize the lunate bone between your thumb and index finger on one hand, while simultaneously stabilizing the triquetrum bone between your thumb and index finger on the other hand.