Impact of referencing scheme on decoding performance of LFP-based brain-machine interface
File(s)Ahmadi_2021_J._Neural_Eng._18_016028.pdf (3.22 MB)
Published version
Author(s)
Ahmadi, Nur
Constandinou, Timothy
Bouganis, Christos-Savvas
Type
Journal Article
Abstract
OBJECTIVE: There has recently been an increasing interest in local field potential (LFP) for brain-machine interface (BMI) applications due to its desirable properties (signal stability and low bandwidth). LFP is typically recorded with respect to a single unipolar reference which is susceptible to common noise. Several referencing schemes have been proposed to eliminate the common noise, such as bipolar reference, current source density (CSD), and common average reference (CAR). However, to date, there have not been any studies to investigate the impact of these referencing schemes on decoding performance of LFP-based BMIs. APPROACH: To address this issue, we comprehensively examined the impact of different referencing schemes and LFP features on the performance of hand kinematic decoding using a deep learning method. We used LFPs chronically recorded from the motor cortex area of a monkey while performing reaching tasks. MAIN RESULTS: Experimental results revealed that local motor potential (LMP) emerged as the most informative feature regardless of the referencing schemes. Using LMP as the feature, CAR was found to yield consistently better decoding performance than other referencing schemes over long-term recording sessions. Significance Overall, our results suggest the potential use of LMP coupled with CAR for enhancing the decoding performance of LFP-based BMIs.
Date Issued
2021-02-23
Date Acceptance
2020-11-26
Citation
Journal of Neural Engineering, 2021, 18 (1)
ISSN
1741-2552
Publisher
IOP Publishing
Journal / Book Title
Journal of Neural Engineering
Volume
18
Issue
1
Copyright Statement
s the Version of Record of this article is going to be/has been published on a gold open access basis under a CC BY 3.0 licence, this Accepted Manuscript is available for reuse under a CC BY 3.0 licence immediately.
Although reasonable endeavours have been taken to obtain all necessary permissions from third parties to include their copyrighted content within this article, their full citation and copyright line may not be present in this Accepted Manuscript version. Before using any content from this article, please refer to the Version of Record on IOPscience once published for full citation and copyright details, as permission may be required. All third party content is fully copyright protected, and is not published on a gold open access basis under a CC BY licence, unless that is specifically stated in the figure caption in the Version of Record.
Although reasonable endeavours have been taken to obtain all necessary permissions from third parties to include their copyrighted content within this article, their full citation and copyright line may not be present in this Accepted Manuscript version. Before using any content from this article, please refer to the Version of Record on IOPscience once published for full citation and copyright details, as permission may be required. All third party content is fully copyright protected, and is not published on a gold open access basis under a CC BY licence, unless that is specifically stated in the figure caption in the Version of Record.
License URL
Identifier
https://www.ncbi.nlm.nih.gov/pubmed/33242850
Subjects
brain-machine interface
common average reference
deep learning
local field potential
local motor potential
neural decoding
referencing scheme
Publication Status
Published
Coverage Spatial
England
Article Number
ARTN 016028
Date Publish Online
2020-11-26