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Implantable Sensor Systems for Medical Applications by D Hodgins, A Inmann

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12

Tripolar interfaces for neural recording

N. de N. Donaldson,     University College London, UK

Abstract:

Nerve activity can be detected by tripoles in the restricted extracellular space created by a surrounding insulator, such as a cuff. With suitable amplification, either compound action potentials or natural nerve traffic may be recorded. This method has been used to provide signals to neuroprostheses. The quality of the recorded signal depends on the design of the cuff, or other structure and of the amplifiers. The basic theory for the method is presented, including signal transduction, noise and interference. An outline of work at University College London on methods to reduce electromyography (EMG) interference follows with examples ...

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