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Use of Functional Near-Infrared Spectroscopy to Predict and Measure Cochlear Implant Outcomes: A Scoping Review

Harrison, Samantha C.; Lawrence, Rachael; Hoare, Derek J.; Wiggins, Ian M.; Hartley, Douglas E. H.

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Samantha C. Harrison

Rachael Lawrence

Associate Professor in Hearing Sciences


Outcomes following cochlear implantation vary widely for both adults and children, and behavioral tests are currently relied upon to assess this. However, these behavioral tests rely on subjective judgements that can be unreliable, particularly for infants and young children. The addition of an objective test of outcome following cochlear implantation is therefore desirable. The aim of this scoping review was to comprehensively catalogue the evidence for the potential of functional near infrared spectroscopy (fNIRS) to be used as a tool to objectively predict and measure cochlear implant outcomes. A scoping review of the literature was conducted following the PRISMA extension for scoping review framework. Searches were conducted in the MEDLINE, EMBASE, PubMed, CINAHL, SCOPUS, and Web of Science electronic databases, with a hand search conducted in Google Scholar. Key terms relating to near infrared spectroscopy and cochlear implants were used to identify relevant publications. Eight records met the criteria for inclusion. Seven records reported on adult populations, with five records only including post-lingually deaf individuals and two including both pre- and post-lingually deaf individuals. Studies were either longitudinal or cross-sectional, and all studies compared fNIRS measurements with receptive speech outcomes. This review identified and collated key work in this field. The homogeneity of the populations studied so far identifies key gaps for future research, including the use of fNIRS in infants. By mapping the literature on this important topic, this review contributes knowledge towards the improvement of outcomes following cochlear implantation.

Journal Article Type Article
Acceptance Date Oct 25, 2021
Online Publication Date Oct 28, 2021
Publication Date 2021-11
Deposit Date Nov 5, 2021
Publicly Available Date Nov 5, 2021
Journal Brain Sciences
Electronic ISSN 2076-3425
Publisher MDPI AG
Peer Reviewed Peer Reviewed
Volume 11
Issue 11
Article Number 1439
Keywords General Neuroscience
Public URL
Publisher URL


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