Sensory feedback regarding the control state is provided through an eighth implanted electrode placed in an area of normal sensation. The electrode leads are tunnelled subcutaneously to the implanted stimulator located in the pectoral region. Surgical procedures to enhance both voluntary and stimulated hand function are often performed in conjunction with stimulator implantation. At the end of 1996, more than 50 quadriplegic individuals have received an implanted hand grasp neuroprosthesis at more than a dozen sites around the world. Patients have demonstrated the ability to grasp and release objects and to perform activities of daily living more independently when using the neuroprosthesis.
Patients utilize the device at home on a regular basis.
The clinical trial is now coordinated by NeuroControl Corp. of Cleveland.