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Equalization for intracortical microstimulation artifact reduction.

  • Author(s): Chu, Philip
  • Muller, Rikky
  • Koralek, Aaron
  • Carmena, Jose M
  • Rabaey, Jan M
  • Gambini, Simone
  • et al.
Abstract

We present a method for decreasing the duration of artifacts present during intra-cortical microstimulation (ICMS) recordings by using techniques developed for digital communications. We replace the traditional monophasic or biphasic current stimulation pulse with a patterned pulse stream produced by a Zero Forcing Equalizer (ZFE) filter after characterizing the artifact as a communications channel. The results find that using the ZFE stimulus has the potential to reduce artifact width by more than 70%. Considerations for the hardware implementation of the equalizer are presented.

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