Fast stimulus artifact recovery in a multichannel neural recording system

Author

Schoenecker, Matthew C. ; Bonham, Ben H.

Author_Institution

UC Berkeley Joint Grad. Group in Bioeng., Univ. of California San Francisco, Berkeley, CA

fYear

2008

Firstpage

253

Lastpage

256

Abstract

We describe a 32-channel recording system and software artifact blanking technique for recording neuronal responses to high-rate electrical stimulation. Each recording channel recovers from biphasic full-scale-input pulses (1.5 V) in less than 80 mus. Artifacts are blanked online in software, allowing flexibility in the choice of blanking period and the possibility of recovering neural data occurring simultaneously with non-saturating artifacts. The system has been used in-vivo to record central neuronal responses to intracochlear electrical stimulation at 2000 pulses per second. Simplicity of the hardware design makes the technique well suited to an implantable multi-channel recording system.

Keywords

bioelectric phenomena; biomedical measurement; cochlear implants; ear; medical signal processing; neurophysiology; biphasic full-scale-input pulses; fast stimulus artifact recovery; high-rate electrical stimulation; implantable recording system; in-vivo central neuronal response recording; intracochlear electrical stimulation; multichannel neural recording system; nonsaturating artifacts; software artifact blanking technique; stimulus flag signal; voltage 1.5 V; Blanking; Cochlear implants; Communication cables; Electrical stimulation; Frequency; Hardware; Magnetic circuits; Magnetic separation; Pulse amplifiers; Pulse modulation; implantable recording system; neural recording; neural stimulation; stimulation artifact;

fLanguage

English

Publisher

ieee

Conference_Titel

Biomedical Circuits and Systems Conference, 2008. BioCAS 2008. IEEE

Conference_Location

Baltimore, MD

Print_ISBN

978-1-4244-2878-6

Electronic_ISBN

978-1-4244-2879-3

Type

conf

DOI

10.1109/BIOCAS.2008.4696922

Filename

4696922