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Alemi R, Nozaradan S, Lehmann A. Free-Field Cortical Steady-State Evoked Potentials in Cochlear Implant Users. Brain Topogr 2021; 34:664-680. [PMID: 34185222 DOI: 10.1007/s10548-021-00860-2] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/04/2021] [Accepted: 06/18/2021] [Indexed: 11/25/2022]
Abstract
Auditory steady-state evoked potentials (SS-EPs) are phase-locked neural responses to periodic stimuli, believed to reflect specific neural generators. As an objective measure, steady-state responses have been used in different clinical settings, including measuring hearing thresholds of normal and hearing-impaired subjects. Recent studies are in favor of recording these responses as a part of the cochlear implant (CI) device-fitting procedure. Considering these potential benefits, the goals of the present study were to assess the feasibility of recording free-field SS-EPs in CI users and to compare their characteristics between CI users and controls. By taking advantage of a recently developed dual-frequency tagging method, we attempted to record subcortical and cortical SS-EPs from adult CI users and controls and measured reliable subcortical and cortical SS-EPs in the control group. Independent component analysis (ICA) was used to remove CI stimulation artifacts, yet subcortical responses of several CIs were heavily contaminated by these artifacts. Consequently, only cortical SS-EPs were compared between groups, which were found to be larger in the controls. The lower cortical SS-EPs' amplitude in CI users might indicate a reduction in neural synchrony evoked by the modulation rate of the auditory input across different neural assemblies in the auditory pathway. The brain topographies of cortical auditory SS-EPs, the time course of cortical responses, and the reconstructed cortical maps were highly similar between groups, confirming their neural origin and possibility to obtain such responses also in CI recipients. As for subcortical SS-EPs, our results highlight a need for sophisticated denoising algorithms to pinpoint and remove artifactual components from the biological response.
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Affiliation(s)
- Razieh Alemi
- Faculty of Medicine, Department of Otolaryngology, McGill University, Montreal, QC, Canada.
- Centre for Research On Brain, Language & Music (CRBLM), Montreal, Canada.
- International Laboratory for Brain, Music & Sound Research (BRAMS), Montreal, QC, Canada.
| | - Sylvie Nozaradan
- Institute of Neuroscience (IONS), Université Catholique de Louvain (UCL), Ottignies-Louvain-la-Neuve, Belgium
| | - Alexandre Lehmann
- Faculty of Medicine, Department of Otolaryngology, McGill University, Montreal, QC, Canada
- Centre for Research On Brain, Language & Music (CRBLM), Montreal, Canada
- International Laboratory for Brain, Music & Sound Research (BRAMS), Montreal, QC, Canada
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Jarollahi F, Valadbeigi A, Jalaei B, Maarefvand M, Zarandy MM, Haghani H, Shirzhiyan Z. Sound-Field Speech Evoked Auditory Brainstem Response in Cochlear-Implant Recipients. J Audiol Otol 2019; 24:71-78. [PMID: 31852176 PMCID: PMC7141996 DOI: 10.7874/jao.2019.00353] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/29/2019] [Accepted: 11/16/2019] [Indexed: 11/30/2022] Open
Abstract
Background and Objectives Currently limited information is available on speech stimuli processing at the subcortical level in the recipients of cochlear implant (CI). Speech processing in the brainstem level is measured using speech-auditory brainstem response (S-ABR). The purpose of the present study was to measure the S-ABR components in the sound-field presentation in CI recipients, and compare with normal hearing (NH) children. Subjects and Methods In this descriptive-analytical study, participants were divided in two groups: patients with CIs; and NH group. The CI group consisted of 20 prelingual hearing impairment children (mean age=8.90 ± 0.79 years), with ipsilateral CIs (right side). The control group consisted of 20 healthy NH children, with comparable age and sex distribution. The S-ABR was evoked by the 40-ms synthesized /da/ syllable stimulus that was indicated in the sound-field presentation. Results Sound-field S-ABR measured in the CI recipients indicated statistically significant delayed latencies, than in the NH group. In addition, these results demonstrated that the frequency following response peak amplitude was significantly higher in CI recipients, than in the NH counterparts (p<0.05). Finally, the neural phase locking were significantly lower in CI recipients (p<0.05). Conclusions The findings of sound-field S-ABR demonstrated that CI recipients have neural encoding deficits in temporal and spectral domains at the brainstem level; therefore, the sound-field S-ABR can be considered an efficient clinical procedure to assess the speech process in CI recipients.
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Affiliation(s)
- Farnoush Jarollahi
- Department of Audiology, School of Rehabilitation Sciences, Iran University of Medical Sciences, Tehran, Iran
| | - Ayub Valadbeigi
- Department of Audiology, School of Rehabilitation Sciences, Iran University of Medical Sciences, Tehran, Iran
| | - Bahram Jalaei
- Department of Audiology, School of Rehabilitation Sciences, Iran University of Medical Sciences, Tehran, Iran
| | - Mohammad Maarefvand
- Department of Audiology, School of Rehabilitation Sciences, Iran University of Medical Sciences, Tehran, Iran
| | - Masoud Motasaddi Zarandy
- Cochlear Implant Center and Department of Otorhinolaryngology, Amir Aalam Hospital, Tehran University of Medical Sciences, Tehran, Iran
| | - Hamid Haghani
- Department of Biostatistics, School of Public Health, Iran University of Medical Sciences, Tehran, Iran
| | - Zahra Shirzhiyan
- Department of Medical Physics and Biomedical Engineering, School of Medicine, Tehran University of Medical Sciences, Tehran, Iran
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Coffey EBJ, Nicol T, White-Schwoch T, Chandrasekaran B, Krizman J, Skoe E, Zatorre RJ, Kraus N. Evolving perspectives on the sources of the frequency-following response. Nat Commun 2019; 10:5036. [PMID: 31695046 PMCID: PMC6834633 DOI: 10.1038/s41467-019-13003-w] [Citation(s) in RCA: 99] [Impact Index Per Article: 19.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/18/2019] [Accepted: 10/14/2019] [Indexed: 11/09/2022] Open
Abstract
The auditory frequency-following response (FFR) is a non-invasive index of the fidelity of sound encoding in the brain, and is used to study the integrity, plasticity, and behavioral relevance of the neural encoding of sound. In this Perspective, we review recent evidence suggesting that, in humans, the FFR arises from multiple cortical and subcortical sources, not just subcortically as previously believed, and we illustrate how the FFR to complex sounds can enhance the wider field of auditory neuroscience. Far from being of use only to study basic auditory processes, the FFR is an uncommonly multifaceted response yielding a wealth of information, with much yet to be tapped.
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Affiliation(s)
- Emily B J Coffey
- Department of Psychology, Concordia University, 1455 Boulevard de Maisonneuve Ouest, Montréal, QC, H3G 1M8, Canada.
- International Laboratory for Brain, Music, and Sound Research (BRAMS), Montréal, QC, Canada.
- Centre for Research on Brain, Language and Music (CRBLM), McGill University, 3640 de la Montagne, Montréal, QC, H3G 2A8, Canada.
| | - Trent Nicol
- Auditory Neuroscience Laboratory, Department of Communication Sciences, Northwestern University, 2240 Campus Dr., Evanston, IL, 60208, USA
| | - Travis White-Schwoch
- Auditory Neuroscience Laboratory, Department of Communication Sciences, Northwestern University, 2240 Campus Dr., Evanston, IL, 60208, USA
| | - Bharath Chandrasekaran
- Communication Sciences and Disorders, School of Health and Rehabilitation Sciences, University of Pittsburgh, Forbes Tower, 3600 Atwood St, Pittsburgh, PA, 15260, USA
| | - Jennifer Krizman
- Auditory Neuroscience Laboratory, Department of Communication Sciences, Northwestern University, 2240 Campus Dr., Evanston, IL, 60208, USA
| | - Erika Skoe
- Department of Speech, Language, and Hearing Sciences, The Connecticut Institute for the Brain and Cognitive Sciences, University of Connecticut, 2 Alethia Drive, Unit 1085, Storrs, CT, 06269, USA
| | - Robert J Zatorre
- International Laboratory for Brain, Music, and Sound Research (BRAMS), Montréal, QC, Canada
- Centre for Research on Brain, Language and Music (CRBLM), McGill University, 3640 de la Montagne, Montréal, QC, H3G 2A8, Canada
- Montreal Neurological Institute, McGill University, 3801 rue Université, Montréal, QC, H3A 2B4, Canada
| | - Nina Kraus
- Auditory Neuroscience Laboratory, Department of Communication Sciences, Northwestern University, 2240 Campus Dr., Evanston, IL, 60208, USA
- Department of Neurobiology, Northwestern University, 2205 Tech Dr., Evanston, IL, 60208, USA
- Department of Otolaryngology, Northwestern University, 420 E Superior St., Chicago, IL, 6011, USA
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Krizman J, Kraus N. Analyzing the FFR: A tutorial for decoding the richness of auditory function. Hear Res 2019; 382:107779. [PMID: 31505395 PMCID: PMC6778514 DOI: 10.1016/j.heares.2019.107779] [Citation(s) in RCA: 81] [Impact Index Per Article: 16.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 07/06/2019] [Revised: 08/01/2019] [Accepted: 08/06/2019] [Indexed: 01/12/2023]
Abstract
The frequency-following response, or FFR, is a neurophysiological response to sound that precisely reflects the ongoing dynamics of sound. It can be used to study the integrity and malleability of neural encoding of sound across the lifespan. Sound processing in the brain can be impaired with pathology and enhanced through expertise. The FFR can index linguistic deprivation, autism, concussion, and reading impairment, and can reflect the impact of enrichment with short-term training, bilingualism, and musicianship. Because of this vast potential, interest in the FFR has grown considerably in the decade since our first tutorial. Despite its widespread adoption, there remains a gap in the current knowledge of its analytical potential. This tutorial aims to bridge this gap. Using recording methods we have employed for the last 20 + years, we have explored many analysis strategies. In this tutorial, we review what we have learned and what we think constitutes the most effective ways of capturing what the FFR can tell us. The tutorial covers FFR components (timing, fundamental frequency, harmonics) and factors that influence FFR (stimulus polarity, response averaging, and stimulus presentation/recording jitter). The spotlight is on FFR analyses, including ways to analyze FFR timing (peaks, autocorrelation, phase consistency, cross-phaseogram), magnitude (RMS, SNR, FFT), and fidelity (stimulus-response correlations, response-to-response correlations and response consistency). The wealth of information contained within an FFR recording brings us closer to understanding how the brain reconstructs our sonic world.
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Affiliation(s)
- Jennifer Krizman
- Auditory Neuroscience Laboratory, Department of Communication Sciences and Disorders, Northwestern University, Evanston, IL, 60208, USA. https://www.brainvolts.northwestern.edu
| | - Nina Kraus
- Auditory Neuroscience Laboratory, Department of Communication Sciences and Disorders, Northwestern University, Evanston, IL, 60208, USA; Department of Neurobiology, Northwestern University, Evanston, IL, 60208, USA.
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Modulation of phase-locked neural responses to speech during different arousal states is age-dependent. Neuroimage 2019; 189:734-744. [DOI: 10.1016/j.neuroimage.2019.01.049] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/13/2018] [Revised: 11/08/2018] [Accepted: 01/20/2019] [Indexed: 01/29/2023] Open
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Ayala YA, Lehmann A, Merchant H. Monkeys share the neurophysiological basis for encoding sound periodicities captured by the frequency-following response with humans. Sci Rep 2017; 7:16687. [PMID: 29192170 PMCID: PMC5709359 DOI: 10.1038/s41598-017-16774-8] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/09/2017] [Accepted: 11/17/2017] [Indexed: 11/09/2022] Open
Abstract
The extraction and encoding of acoustical temporal regularities are fundamental for human cognitive auditory abilities such as speech or beat entrainment. Because the comparison of the neural sensitivity to temporal regularities between human and animals is fundamental to relate non-invasive measures of auditory processing to their neuronal basis, here we compared the neural representation of auditory periodicities between human and non-human primates by measuring scalp-recorded frequency-following response (FFR). We found that rhesus monkeys can resolve the spectrotemporal structure of periodic stimuli to a similar extent as humans by exhibiting a homologous FFR potential to the speech syllable /da/. The FFR in both species is robust and phase-locked to the fundamental frequency of the sound, reflecting an effective neural processing of the fast-periodic information of subsyllabic cues. Our results thus reveal a conserved neural ability to track acoustical regularities within the primate order. These findings open the possibility to study the neurophysiology of complex sound temporal processing in the macaque subcortical and cortical areas, as well as the associated experience-dependent plasticity across the auditory pathway in behaving monkeys.
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Affiliation(s)
- Yaneri A Ayala
- Instituto de Neurobiología, UNAM, Campus Juriquilla, Boulevard Juriquilla No. 3001, Querétaro, Qro. 76230, Mexico.
| | - Alexandre Lehmann
- Department of Otolaryngology Head & Neck Surgery, McGill University, Montreal, QC, Canada.,International Laboratory for Brain, Music and Sound Research (BRAMS), Center for Research on Brain, Language and Music (CRBLM), Pavillon 1420, Montreal, QC H3C 3J7, Canada.,Department of Psychology, University of Montreal, Montreal, QC, Canada
| | - Hugo Merchant
- Instituto de Neurobiología, UNAM, Campus Juriquilla, Boulevard Juriquilla No. 3001, Querétaro, Qro. 76230, Mexico.
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