Stimulus-Artifact Elimination in a Multi-Electrode System

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To fully exploit the recording capabilities provided by current and future generations of multi-electrode arrays, some means to eliminate the residual charge and subsequent artifacts generated by stimulation protocols is required. Custom electronics can be used to achieve such goals, and by making them scalable, a large number of electrodes can be accessed in an experiment. In this work, we present a system built around a custom 16-channel IC that can stimulate and record, within 3 ms of the stimulus, on the stimulating channel, and within 500 mu s on adjacent channels. This effectiveness is achieved by directly discharging the electrode through a novel feedback scheme, and by shaping such feedback to optimize electrode behavior. We characterize the different features of the system that makes such performance possible and present biological data that show the system in operation. To enable this characterization, we present a framework for measuring, classifying, and understanding the multiple sources of stimulus artifacts. This framework facilitates comparisons between artifact elimination methodologies and enables future artifact studies.
Publisher
IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC
Issue Date
2008-03
Language
English
Article Type
Article
Citation

IEEE TRANSACTIONS ON BIOMEDICAL CIRCUITS AND SYSTEMS, v.2, no.1, pp.10 - 21

ISSN
1932-4545
DOI
10.1109/TBCAS.2008.918285
URI
http://hdl.handle.net/10203/89397
Appears in Collection
BiS-Journal Papers(저널논문)
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