Highlights • fNIRS has the potential to provide an objective measure of speech understanding.• Left superior temporal activation grows monotonically with speech intelligibility.• fNIRS responses also vary with speech intelligibility… Click to show full abstract
Highlights • fNIRS has the potential to provide an objective measure of speech understanding.• Left superior temporal activation grows monotonically with speech intelligibility.• fNIRS responses also vary with speech intelligibility in other cortical regions.• Right posterior middle temporal regions exhibit relative deactivation.• The amplitude of deactivation is greater in more difficult listening conditions.
               
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