Cause of Subharmonics in Local Field Potentials Recorded by Sensing-Enabled Neurostimulator

Sensing-enabled neurostimulators have become an essential technology for recording local field potentials (LFPs) during neurostimulation. However, subharmonics from indeterminate sources make interpreting LFP recordings a challenge. In this study, we investigated the characteristics and the cause of...

Full description

Saved in:
Bibliographic Details
Main Authors: Chen, Yue, Ma, Bozhi, Hao, Hongwei, Li, Luming
Format: Conference Proceeding
Language:English
Subjects:
Biology
Biomedical signal processing
Clinical neuroscience
Evoked Potentials - physiology
Models, Neurological
Neurostimulation
Performance evaluation
Sensors
Citations: Items that cite this one
Online Access:Request full text
Tags: Add Tag
No Tags, Be the first to tag this record!
Description
Summary:Sensing-enabled neurostimulators have become an essential technology for recording local field potentials (LFPs) during neurostimulation. However, subharmonics from indeterminate sources make interpreting LFP recordings a challenge. In this study, we investigated the characteristics and the cause of the subharmonics recorded by sensing-enabled neurostimulators. We found that the amplitudes and frequencies of the subharmonics in clinical LFPs varied with stimulation parameters. Using simulated solutions, we demonstrated that these subharmonics were device-generated noise. The cause of the subharmonics was the ripples in the stimulation pulses residual in the final LFP recordings. Our results provided a method to discriminate the subharmonic artifacts and suggested that interpretation of the subharmonics at a fractional frequency of stimulations in LFP recordings should be performed carefully.Clinical Relevance- This study reveals the cause of subharmonics in LFP recordings for clinical neuroscience research.
ISSN:2694-0604
DOI:10.1109/EMBC46164.2021.9630422