Abstract: A device and method of testing muscle stiffness or spasticity. The method includes: controlling an actuator to periodically change between a pressurized state and a relaxed state such that the actuator in at least the pressurized state provides a cyclic force contributing to at least one deformation of a piezoelectric film, the actuator in at least the relaxed state providing a lateral surface in abutment with the piezoelectric film, the piezoelectric film being variably deformable and conformable to the muscle or the muscle group; acquiring a signal generated by the at least one deformation of the piezoelectric film, wherein a change in the signal corresponds to the at least one deformation of the piezoelectric film; and determining a quantitative measure of a muscle spasticity state of the muscle or the muscle group based on the signal.

Abstract: A muscle spasticity measurement system and sensor comprise a housing having a flexible wall and a constraining wall defining a cavity. A piezoelectric device is disposed in the cavity between an actuating bag and the flexible wall. The piezoelectric device is coupled to the housing substantially via an interior face of the flexible wall. The actuating bag is configured to be pneumatically operable. The actuating bag in an inflated state is constrainable by the housing to press an exterior face of the flexible wall against a body part of the subject.

Abstract: An inkjet printable ionic conductive ink for producing a touch sensor device is provided. The inkjet printable ionic conductive ink includes a hydrophilic polymer and an ionic salt, a mixture of solvents in which the hydrophilic polymer and the ionic salt are dissolved therein to form a solution, and a surfactant to render the solution inkjet printable. A method of producing the inkjet printable ionic conductive ink is also provided. The method includes dissolving a hydrophilic polymer and an ionic salt in a mixture of solvents to form a solution, and mixing the solution with a surfactant to render the solution inkjet printable. A touch sensor panel comprising the ionic conductive ink and a method of producing the touch sensor panel are also provided.

Abstract: An inkjet printable ionic conductive ink for producing a touch sensor device is provided. The inkjet printable ionic conductive ink includes a hydrophilic polymer and an ionic salt, a mixture of solvents in which the hydrophilic polymer and the ionic salt are dissolved therein to form a solution, and a surfactant to render the solution inkjet printable. A method of producing the inkjet printable ionic conductive ink is also provided. The method includes dissolving a hydrophilic polymer and an ionic salt in a mixture of solvents to form a solution, and mixing the solution with a surfactant to render the solution inkjet printable. A touch sensor panel comprising the ionic conductive ink and a method of producing the touch sensor panel are also provided.