Auditory cortex activation to natural speech and simulated cochlear implant speech measured with functional near-infrared spectroscopy

Hearing Research
Luca PolloniniJohn S Oghalai

Abstract

The primary goal of most cochlear implant procedures is to improve a patient's ability to discriminate speech. To accomplish this, cochlear implants are programmed so as to maximize speech understanding. However, programming a cochlear implant can be an iterative, labor-intensive process that takes place over months. In this study, we sought to determine whether functional near-infrared spectroscopy (fNIRS), a non-invasive neuroimaging method which is safe to use repeatedly and for extended periods of time, can provide an objective measure of whether a subject is hearing normal speech or distorted speech. We used a 140 channel fNIRS system to measure activation within the auditory cortex in 19 normal hearing subjects while they listed to speech with different levels of intelligibility. Custom software was developed to analyze the data and compute topographic maps from the measured changes in oxyhemoglobin and deoxyhemoglobin concentration. Normal speech reliably evoked the strongest responses within the auditory cortex. Distorted speech produced less region-specific cortical activation. Environmental sounds were used as a control, and they produced the least cortical activation. These data collected using fNIRS are consistent w...Continue Reading

Citations

Sep 9, 2020·Journal of Neuroimaging : Official Journal of the American Society of Neuroimaging·Luca PolloniniHyochol Ahn
Apr 11, 2018·Journal of the Association for Research in Otolaryngology : JARO·Stefan WederColette McKay
Jan 1, 2017·Language, Cognition and Neuroscience·Jonathan E Peelle
Jan 19, 2021·Child Neuropsychology : a Journal on Normal and Abnormal Development in Childhood and Adolescence·Alexandra H BettisBruce E Compas
Nov 8, 2020·Neuroscience and Biobehavioral Reviews·Keerthana Deepti KarunakaranDavid Borsook
Mar 30, 2021·Journal of Neural Engineering·Milan RybářIan Daly
May 16, 2021·Human Brain Mapping·Hanieh MohammadiLouis Bherer
Jun 3, 2021·International Journal of Molecular Sciences·Filipe Gonçalves CostaFrank Van Bel
May 18, 2021·Frontiers in Human Neuroscience·So-Hyeon YooKeum-Shik Hong
Dec 6, 2019·Wiley Interdisciplinary Reviews. Systems Biology and Medicine·J Tilak Ratnanather
Jul 19, 2021·Neurobiology of Aging·Hanieh MohammadiYves Joanette
Sep 29, 2021·Journal of the Association for Research in Otolaryngology : JARO·Faizah MushtaqDouglas E H Hartley
May 19, 2020··Samuel Montero HernandezLuca Pollonini

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