Össur (prosthetic leg)

2019: Prosthesis installation begins

In early September 2019, orthopedic surgeons began installing Össur bionic prostheses developed by an international team of researchers that allow disabled people to feel the knee and foot. At the same time, neurofeedback based on sensors connecting to residual nerves of the hip significantly reduces the physical and mental stress of users.

The nervous system constantly uses sensory feedback to precisely control muscle movement. However, people using a prosthetic leg do not know its exact location, preventing them from fully relying on the injured leg. The lack of feedback reduces the mobility of these people and makes them get tired quickly. In addition, due to residual nerves, amputees may experience phantom pain in their limbs.

Össur prostheses that allow disabled people to feel the knee and foot

An international team of researchers led by ETH Zurich and Lausanne-based SensArs has developed an interface to connect the prosthetic leg to residual hip nerves, providing sensory feedback. In a study conducted in collaboration with the University of Belgrade, the scientists tested this neurocontrol system with the help of two volunteers with an above-the-knee amputation.

As part of the study, volunteers underwent a series of tests - alternating tests with and without neurofeedback. The results showed that walking with neurofeedback required much less effort from the patient, as evidenced by low oxygen consumption. In addition, volunteers did not have to concentrate on walking, and they could pay more attention to other tasks. A similar interface can also be used to stimulate nerves independently of the prosthesis. This technique allows you to relieve phantom pain.^[1]

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