Equalization for intracortical microstimulation artifact reduction

Author

Chu, Peter ; Muller, Rudolf ; Koralek, Aaron ; Carmena, Jose M. ; Rabaey, Jan M. ; Gambini, Simone

Author_Institution

Dept. of Electr. Eng. & Comput. Sci., Univ. of California at Berkeley, Berkeley, CA, USA

fYear

2013

fDate

3-7 July 2013

Firstpage

245

Lastpage

248

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.

Keywords

bioelectric phenomena; brain; medical signal processing; neuromuscular stimulation; patient diagnosis; signal denoising; ICMS; ZFE stimulus; Zero Forcing Equalizer filter; artifact characterization; artifact duration; artifact width reduction; biphasic current stimulation pulse; communication channel; digital communication; hardware implementation; intracortical microstimulation artifact reduction; intracortical microstimulation recording; monophasic current stimulation pulse; patterned pulse stream; Current measurement; Data models; Educational institutions; Electrodes; Equalizers; Mathematical model; Neuroscience; Artifact; Equalization; ICMS; LFP; Linearity; Microstimulation; Neural Recording; ZFE;

fLanguage

English

Publisher

ieee

Conference_Titel

Engineering in Medicine and Biology Society (EMBC), 2013 35th Annual International Conference of the IEEE

Conference_Location

Osaka

ISSN

1557-170X

Type

conf

DOI

10.1109/EMBC.2013.6609483

Filename

6609483