Factoring muscle activation and anisotropy in modelling hand-transmitted vibrations: a preliminary study

Publication

Pushing and gripping forces may contribute to Hand-Arm Vibration Syndrome but have not been taken into account so far in vibratory dose assessment according to current standards. To obtain better understanding of symptom onset, we developed a finite element model of the hand to replicate its vibratory behaviour for gripping and pushing actions. Supersonic Shear Imaging measurements in a case study revealed significant dependence of muscle stiffness and anisotropy on gripping. Using these measurements in our model showed that muscle activation influences the driving-point mechanical impedance of the hand and local vibration propagation.