0
views
0
recommends
+1 Recommend
0 collections
    0
    shares
      • Record: found
      • Abstract: found
      • Article: found
      Is Open Access

      On decoding of rapid motor imagery in a diverse population using a high-density NIRS device

      research-article

      Read this article at

      Bookmark
          There is no author summary for this article yet. Authors can add summaries to their articles on ScienceOpen to make them more accessible to a non-specialist audience.

          Abstract

          Introduction

          Functional near-infrared spectroscopy (fNIRS) aims to infer cognitive states such as the type of movement imagined by a study participant in a given trial using an optical method that can differentiate between oxygenation states of blood in the brain and thereby indirectly between neuronal activity levels. We present findings from an fNIRS study that aimed to test the applicability of a high-density (>3000 channels) NIRS device for use in short-duration (2 s) left/right hand motor imagery decoding in a diverse, but not explicitly balanced, subject population. A side aim was to assess relationships between data quality, self-reported demographic characteristics, and brain-computer interface (BCI) performance, with no subjects rejected from recruitment or analysis.

          Methods

          BCI performance was quantified using several published methods, including subject-specific and subject-independent approaches, along with a high-density fNIRS decoder previously validated in a separate study.

          Results

          We found that decoding of motor imagery on this population proved extremely challenging across all tested methods. Overall accuracy of the best-performing method (the high-density decoder) was 59.1 +/– 6.7% after excluding subjects where almost no optode-scalp contact was made over motor cortex and 54.7 +/– 7.6% when all recorded sessions were included. Deeper investigation revealed that signal quality, hemodynamic responses, and BCI performance were all strongly impacted by the hair phenotypical and demographic factors under investigation, with over half of variance in signal quality explained by demographic factors alone.

          Discussion

          Our results contribute to the literature reporting on challenges in using current-generation NIRS devices on subjects with long, dense, dark, and less pliable hair types along with the resulting potential for bias. Our findings confirm the need for increased focus on these populations, accurate reporting of data rejection choices across subject intake, curation, and final analysis in general, and signal a need for NIRS optode designs better optimized for the general population to facilitate more robust and inclusive research outcomes.

          Related collections

          Most cited references77

          • Record: found
          • Abstract: not found
          • Article: not found

          Controlling the False Discovery Rate: A Practical and Powerful Approach to Multiple Testing

            Bookmark
            • Record: found
            • Abstract: found
            • Article: found
            Is Open Access

            SciPy 1.0: fundamental algorithms for scientific computing in Python

            SciPy is an open-source scientific computing library for the Python programming language. Since its initial release in 2001, SciPy has become a de facto standard for leveraging scientific algorithms in Python, with over 600 unique code contributors, thousands of dependent packages, over 100,000 dependent repositories and millions of downloads per year. In this work, we provide an overview of the capabilities and development practices of SciPy 1.0 and highlight some recent technical developments.
              Bookmark
              • Record: found
              • Abstract: found
              • Article: found
              Is Open Access

              Array programming with NumPy

              Array programming provides a powerful, compact and expressive syntax for accessing, manipulating and operating on data in vectors, matrices and higher-dimensional arrays. NumPy is the primary array programming library for the Python language. It has an essential role in research analysis pipelines in fields as diverse as physics, chemistry, astronomy, geoscience, biology, psychology, materials science, engineering, finance and economics. For example, in astronomy, NumPy was an important part of the software stack used in the discovery of gravitational waves 1 and in the first imaging of a black hole 2 . Here we review how a few fundamental array concepts lead to a simple and powerful programming paradigm for organizing, exploring and analysing scientific data. NumPy is the foundation upon which the scientific Python ecosystem is constructed. It is so pervasive that several projects, targeting audiences with specialized needs, have developed their own NumPy-like interfaces and array objects. Owing to its central position in the ecosystem, NumPy increasingly acts as an interoperability layer between such array computation libraries and, together with its application programming interface (API), provides a flexible framework to support the next decade of scientific and industrial analysis.
                Bookmark

                Author and article information

                Contributors
                URI : http://loop.frontiersin.org/people/244172/overviewRole: Role: Role: Role: Role: Role: Role: Role: Role:
                Role: Role: Role: Role: Role: Role: Role: Role:
                URI : http://loop.frontiersin.org/people/2646062/overviewRole: Role: Role: Role: Role: Role: Role: Role: Role: Role: Role:
                Role: Role: Role: Role: Role: Role: Role:
                Journal
                Front Neuroergon
                Front Neuroergon
                Front. Neuroergon.
                Frontiers in Neuroergonomics
                Frontiers Media S.A.
                2673-6195
                11 March 2024
                2024
                : 5
                : 1355534
                Affiliations
                Intheon , La Jolla, CA, United States
                Author notes

                Edited by: Serafeim Perdikis, University of Essex, United Kingdom

                Reviewed by: Milan Rybář, University of Essex, United Kingdom

                Athanasios Vourvopoulos, Instituto Superior Técnico (ISR), Portugal

                *Correspondence: Christian Kothe christian.kothe@ 123456intheon.io

                †These authors have contributed equally to this work

                Article
                10.3389/fnrgo.2024.1355534
                10961353
                38529269
                a8706fc7-ef60-481a-9974-b1f1f82520bc
                Copyright © 2024 Kothe, Hanada, Mullen and Mullen.

                This is an open-access article distributed under the terms of the Creative Commons Attribution License (CC BY). The use, distribution or reproduction in other forums is permitted, provided the original author(s) and the copyright owner(s) are credited and that the original publication in this journal is cited, in accordance with accepted academic practice. No use, distribution or reproduction is permitted which does not comply with these terms.

                History
                : 14 December 2023
                : 20 February 2024
                Page count
                Figures: 10, Tables: 5, Equations: 4, References: 79, Pages: 25, Words: 17683
                Funding
                The author(s) declare financial support was received for the research, authorship, and/or publication of this article. The study was funded by Meta Reality Labs under research contract 70000032559.
                Categories
                Neuroergonomics
                Original Research
                Custom metadata
                Neurotechnology and Systems Neuroergonomics

                fnirs,bci,high-density,motor imagery,diversity,demographics,bias
                fnirs, bci, high-density, motor imagery, diversity, demographics, bias

                Comments

                Comment on this article