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© 2022. This work is licensed under https://creativecommons.org/licenses/by/4.0/ (the “License”). Notwithstanding the ProQuest Terms and Conditions, you may use this content in accordance with the terms of the License.

Abstract

Significance

Functional near-infrared spectroscopy (fNIRS) is unique among neuroimaging techniques in its ability to estimate changes in both oxyhemoglobin (HbO) and deoxyhemoglobin (HbR). However, fNIRS research has applied various data reporting practices based on these chromophores as measures of neural activation.

Aim

To quantify the variability of fNIRS chromophore data reporting practices and to explore recent data reporting trends in the literature.

Approach

We reviewed 660 fNIRS papers from 2015, 2018, and 2021 to extract information on fNIRS chromophore data reporting practices.

Results

Our review revealed five general practices for reporting fNIRS chromophores: (1) HbO only, (2) HbR only, (3) HbO and HbR, (4) correlation-based signal improvement, and (5) either the total (HbT) or difference (HbDiff) in concentration between chromophores. The field was primarily divided between reporting HbO only and reporting HbO and HbR. However, reporting one chromophore (HbO) was consistently observed as the most popular data reporting practice for each year reviewed.

Conclusions

Our results highlight the high heterogeneity of chromophore data reporting in fNIRS research. We discuss its potential implications for study comparison efforts and interpretation of results. Most importantly, our review demonstrates the need for a standard chromophore reporting practice to improve scientific transparency and, ultimately, to better understand how neural events relate to cognitive phenomena.

Details

Title
Systematic review of fNIRS studies reveals inconsistent chromophore data reporting practices
Author
Kinder, Kaleb T; Heim, Hollis L R; Parker, Jessica; Lowery, Kara; McCraw, Alexis; Eddings, Rachel N; Defenderfer, Jessica; Sullivan, Jacqueline; Buss, Aaron T
First page
40601
Section
Review Papers
Publication year
2022
Publication date
Oct 2022
Publisher
S P I E - International Society for
ISSN
2329423X
e-ISSN
23294248
Source type
Scholarly Journal
Language of publication
English
ProQuest document ID
2858381661
Copyright
© 2022. This work is licensed under https://creativecommons.org/licenses/by/4.0/ (the “License”). Notwithstanding the ProQuest Terms and Conditions, you may use this content in accordance with the terms of the License.