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The Use of Broad vs Restricted Regions of Interest in Functional Near-infrared Spectroscopy for Measuring Cortical Activation to Auditory-only and Visual-only Speech by Maureen J. Shader; Robert Luke; Nathalie Gouailhardou; Colette M. McKay is a Neuroscience article available to read on EtoBox.

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As an alternative to fMRI, functional near-infrared spectroscopy (fNIRS) is a relatively new tool for observing cortical activation. However, spatial resolution is reduced compared to fMRI and often the exact locations of fNIRS optodes and specific anatomical information is not known. The aim of this study was to explore the location and range of specific regions of interest that are sensitive to detecting cortical activation using fNIRS in response to auditory- and visual-only connected speech. Two approaches to a priori region-of-interest selection were explored. First, broad regions corresponding to the auditory cortex and occipital lobe were analysed. Next, the fNIRS Optode Location Decider (fOLD) tool was used to divide the auditory and visual regions into two subregions corresponding to distinct anatomical structures. The Auditory-A and -B regions corresponded to Heschl's gyrus and planum temporale, respectively. The Visual-A region corresponded to the superior occipital gyrus and the cuneus, and the Visual-B region corresponded to the middle occipital gyrus. The experimental stimulus consisted of a connected speech signal segmented into 12.5-sec blocks and was presented in e

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Author

Maureen J. Shader; Robert Luke; Nathalie Gouailhardou; Colette M. McKay

Publisher

Elsevier BV

Published

2021

Language

EN

Field

Neuroscience (Life Sciences)