receiverstimulator

A receiver-stimulator is an implanted electronic device that receives a wireless signal from an external transmitter and converts that signal into electrical stimulation delivered to neural tissue or muscle. The term is most commonly used in cochlear implants, where the implanted component couples with an external sound processor via inductive radio frequency signaling.

In cochlear implant systems, the external device, typically worn behind the ear, processes sound into a digital code and transmits it across the skin to an implanted receiver-stimulator. The implanted unit contains a receiving coil and the electronics that decode the transmitted data and power. It then drives an electrode array implanted in the cochlea, delivering precisely timed electrical pulses to stimulate auditory nerve fibers. The electrode array commonly comprises multiple contacts arranged to create a range of perceptual pitches, and the stimulation pattern is programmed by clinicians to suit the individual user.

The receiver-stimulator is powered inductively by the external unit; no internal battery is carried by the implanted portion. It also provides telemetry to monitor electrode impedance and electrode-nerve interface status, aiding programming and safety checks. Stimulation strategies vary and may adjust parameters such as pulse width, rate, and current amplitude to balance sound quality, speech perception, and comfort.

Beyond cochlear implants, the concept applies to other neural or muscular stimulation systems that use an implanted receiver to obtain control signals from an external source. The device is designed with biocompatible enclosures and hermetic packaging to minimize risk and extend longevity.