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Choi HJ, Kyong JS, Lee JH, Han SH, Shim HJ. The Impact of Spectral and Temporal Degradation on Vocoded Speech Recognition in Early-Blind Individuals. eNeuro 2024; 11:ENEURO.0528-23.2024. [PMID: 38811162 PMCID: PMC11137809 DOI: 10.1523/eneuro.0528-23.2024] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/14/2023] [Revised: 04/11/2024] [Accepted: 05/01/2024] [Indexed: 05/31/2024] Open
Abstract
This study compared the impact of spectral and temporal degradation on vocoded speech recognition between early-blind and sighted subjects. The participants included 25 early-blind subjects (30.32 ± 4.88 years; male:female, 14:11) and 25 age- and sex-matched sighted subjects. Tests included monosyllable recognition in noise at various signal-to-noise ratios (-18 to -4 dB), matrix sentence-in-noise recognition, and vocoded speech recognition with different numbers of channels (4, 8, 16, and 32) and temporal envelope cutoff frequencies (50 vs 500 Hz). Cortical-evoked potentials (N2 and P3b) were measured in response to spectrally and temporally degraded stimuli. The early-blind subjects displayed superior monosyllable and sentence recognition than sighted subjects (all p < 0.01). In the vocoded speech recognition test, a three-way repeated-measure analysis of variance (two groups × four channels × two cutoff frequencies) revealed significant main effects of group, channel, and cutoff frequency (all p < 0.001). Early-blind subjects showed increased sensitivity to spectral degradation for speech recognition, evident in the significant interaction between group and channel (p = 0.007). N2 responses in early-blind subjects exhibited shorter latency and greater amplitude in the 8-channel (p = 0.022 and 0.034, respectively) and shorter latency in the 16-channel (p = 0.049) compared with sighted subjects. In conclusion, early-blind subjects demonstrated speech recognition advantages over sighted subjects, even in the presence of spectral and temporal degradation. Spectral degradation had a greater impact on speech recognition in early-blind subjects, while the effect of temporal degradation was similar in both groups.
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Affiliation(s)
- Hyo Jung Choi
- Department of Otorhinolaryngology-Head and Neck Surgery, Nowon Eulji Medical Center, Eulji University School of Medicine, Seoul 01830, Republic of Korea
- Eulji Tinnitus and Hearing Research Institute, Nowon Eulji Medical Center, Seoul 01830, Republic of Korea
| | - Jeong-Sug Kyong
- Sensory Organ Institute, Medical Research Institute, Seoul National University, Seoul 03080, Republic of Korea
- Department of Radiology, Konkuk University Medical Center, Seoul 05030, Republic of Korea
| | - Jae Hee Lee
- Department of Audiology and Speech-Language Pathology, Hallym University of Graduate Studies, Seoul 06197, Republic of Korea
| | - Seung Ho Han
- Department of Physiology and Biophysics, School of Medicine, Eulji University, Daejeon 34824, Republic of Korea
| | - Hyun Joon Shim
- Department of Otorhinolaryngology-Head and Neck Surgery, Nowon Eulji Medical Center, Eulji University School of Medicine, Seoul 01830, Republic of Korea
- Eulji Tinnitus and Hearing Research Institute, Nowon Eulji Medical Center, Seoul 01830, Republic of Korea
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Rutiku R, Fiscone C, Massimini M, Sarasso S. Assessing mismatch negativity (MMN) and P3b within-individual sensitivity - A comparison between the local-global paradigm and two specialized oddball sequences. Eur J Neurosci 2024; 59:842-859. [PMID: 38439197 DOI: 10.1111/ejn.16302] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/19/2023] [Revised: 02/13/2024] [Accepted: 02/15/2024] [Indexed: 03/06/2024]
Abstract
Mismatch negativity (MMN) and P3b are well known for their clinical utility. There exists no gold standard, however, for acquiring them as EEG markers of consciousness in clinical settings. This may explain why the within-individual sensitivity of MMN/P3b paradigms is often quite poor and why seemingly identical EEG markers can behave differently across Disorders of consciousness (DoC) studies. Here, we compare two traditional paradigms for MMN or P3b assessment with the recently more popular local-global paradigm that promises to assess MMN and P3b orthogonally within one oddball sequence. All three paradigms were administered to healthy participants (N = 15) with concurrent EEG. A clear MMN and local effect were found for 15/15 participants. The P3b and global effect were found for 14/15 and 13/15 participants, respectively. There were no systematic differences between the global effect and P3b. Indeed, P3b amplitude was highly correlated across paradigms. The local effect differed clearly from the MMN, however. It occurred earlier than MMN and was followed by a much more prominent P3a. The peak latencies and amplitudes were also not correlated across paradigms. Caution should therefore be exercised when comparing the local effect and MMN across studies. We conclude that the within-individual MMN sensitivity is adequate for both the local-global and a dedicated MMN paradigm. The within-individual sensitivity of P3b was lower than expected for both the local-global and a dedicated P3b paradigm, which may explain the often-low sensitivity of P3b paradigms in patients with DoC.
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Affiliation(s)
- Renate Rutiku
- Department of Biomedical and Clinical Sciences, University of Milan, Milan, Italy
- C-lab, Institute of Psychology, Jagiellonian University, Krakow, Poland
| | - Chiara Fiscone
- Department of Biomedical and Clinical Sciences, University of Milan, Milan, Italy
| | - Marcello Massimini
- Department of Biomedical and Clinical Sciences, University of Milan, Milan, Italy
- IRCCS Fondazione Don Carlo Gnocchi Onlus, Milan, Italy
| | - Simone Sarasso
- Department of Biomedical and Clinical Sciences, University of Milan, Milan, Italy
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Cocquyt EM, Van Laeken H, van Mierlo P, De Letter M. Test-retest reliability of electroencephalographic and magnetoencephalographic measures elicited during language tasks: A literature review. Eur J Neurosci 2023; 57:1353-1367. [PMID: 36864752 DOI: 10.1111/ejn.15948] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/15/2022] [Revised: 02/10/2023] [Accepted: 02/22/2023] [Indexed: 03/04/2023]
Abstract
Electroencephalographic (EEG) and magnetoencephalographic (MEG) recordings during language processing can provide relevant insights on neuroplasticity in clinical populations (including patients with aphasia). To use EEG and MEG in a longitudinal way, the outcome measures should be consistent across time in healthy individuals. Therefore, the current study provides a review on the test-retest reliability of EEG and MEG measures elicited during language paradigms in healthy adults. PubMed, Web of Science and Embase were searched for relevant articles based on specific eligibility criteria. In total, 11 articles were included in this literature review. The test-retest reliability of the P1, N1 and P2 is systematically considered to be satisfactory, whereas findings are more variable for event-related potentials/fields occurring later in time. The within subject consistency of EEG and MEG measures during language processing can be influenced by multiple variables such as the stimulus presentation mode, the offline reference choice and the required amount of cognitive resources during the task. To conclude, most of the available results are favourable regarding the longitudinal use of EEG and MEG measures elicited during language paradigms in healthy young individuals. In view to the use of these techniques in patients with aphasia, future research should focus on whether the same findings apply to different age groups.
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Affiliation(s)
| | - Heleen Van Laeken
- Department of Rehabilitation Sciences, Ghent University, Ghent, Belgium
| | - Pieter van Mierlo
- Department of Electronics and Information Systems, Medical Image and Signal Processing Group, Ghent University, Ghent, Belgium
| | - Miet De Letter
- Department of Rehabilitation Sciences, Ghent University, Ghent, Belgium
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Voola M, Nguyen AT, Marinovic W, Rajan G, Tavora-Vieira D. Odd-even oddball task: Evaluating event-related potentials during word discrimination compared to speech-token and tone discrimination. Front Neurosci 2022; 16:983498. [PMID: 36312013 PMCID: PMC9614253 DOI: 10.3389/fnins.2022.983498] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/01/2022] [Accepted: 09/29/2022] [Indexed: 11/21/2022] Open
Abstract
Tonal and speech token auditory oddball tasks have been commonly used to assess auditory processing in various populations; however, tasks using non-word sounds may fail to capture the higher-level ability to interpret and discriminate stimuli based on meaning, which are critical to language comprehension. As such, this study examines how neural signals associated with discrimination and evaluation-processes (P3b) from semantic stimuli compare with those elicited by tones and speech tokens. This study comprises of two experiments, both containing thirteen adults with normal hearing in both ears (PTA ≤ 20 dB HL). Scalp electroencephalography and auditory event related potentials were recorded in free field while they completed three different oddball tasks: (1) tones, (2) speech tokens and (3) odd/even numbers. Based on the findings of experiment one, experiment two was conducted to understand if the difference in responses from the three tasks was attributable to stimulus duration or other factors. Therefore, in experiment one, stimulus duration was not controlled and in experiment two, the duration of each stimulus was modified to be the same across all three tasks (∼400 ms). In both experiments, P3b peak latency was significantly different between all three tasks. P3b amplitude was sensitive to reaction time, with tasks that had a large reaction time variability resulting in the P3b amplitude to be smeared, thereby reducing the amplitude size. The findings from this study highlight the need to consider all factors of the task before attributing any effects to any additional process, such as semantic processing and mental effort. Furthermore, it highlights the need for more cautious interpretation of P3b results in auditory oddball tasks.
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Affiliation(s)
- Marcus Voola
- Division of Surgery, Medical School, The University of Western Australia, Perth, WA, Australia
- Department of Audiology, Fiona Stanley Fremantle Hospitals Group, Perth, WA, Australia
- *Correspondence: Marcus Voola,
| | - An T. Nguyen
- School of Population Health, Curtin University, Perth, WA, Australia
| | - Welber Marinovic
- School of Population Health, Curtin University, Perth, WA, Australia
| | - Gunesh Rajan
- Division of Surgery, Medical School, The University of Western Australia, Perth, WA, Australia
- Department of Otolaryngology, Head and Neck Surgery, Luzerner Kantonsspital, Luzern, Switzerland
| | - Dayse Tavora-Vieira
- Division of Surgery, Medical School, The University of Western Australia, Perth, WA, Australia
- Department of Audiology, Fiona Stanley Fremantle Hospitals Group, Perth, WA, Australia
- School of Population Health, Curtin University, Perth, WA, Australia
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Tao DD, Zhang YM, Liu H, Zhang W, Xu M, Galvin JJ, Zhang D, Liu JS. The P300 Auditory Event-Related Potential May Predict Segregation of Competing Speech by Bimodal Cochlear Implant Listeners. Front Neurosci 2022; 16:888596. [PMID: 35757527 PMCID: PMC9226716 DOI: 10.3389/fnins.2022.888596] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/03/2022] [Accepted: 05/16/2022] [Indexed: 11/13/2022] Open
Abstract
Compared to normal-hearing (NH) listeners, cochlear implant (CI) listeners have greater difficulty segregating competing speech. Neurophysiological studies have largely investigated the neural foundations for CI listeners' speech recognition in quiet, mainly using the P300 component of event-related potentials (ERPs). P300 is closely related to cognitive processes involving auditory discrimination, selective attention, and working memory. Different from speech perception in quiet, little is known about the neurophysiological foundations for segregation of competing speech by CI listeners. In this study, ERPs were measured for a 1 vs. 2 kHz contrast in 11 Mandarin-speaking bimodal CI listeners and 11 NH listeners. Speech reception thresholds (SRTs) for a male target talker were measured in steady noise or with a male or female masker. Results showed that P300 amplitudes were significantly larger and latencies were significantly shorter for the NH than for the CI group. Similarly, SRTs were significantly better for the NH than for the CI group. Across all participants, P300 amplitude was significantly correlated with SRTs in steady noise (r = -0.65, p = 0.001) and with the competing male (r = -0.62, p = 0.002) and female maskers (r = -0.60, p = 0.003). Within the CI group, there was a significant correlation between P300 amplitude and SRTs with the male masker (r = -0.78, p = 0.005), which produced the most informational masking. The results suggest that P300 amplitude may be a clinically useful neural correlate of central auditory processing capabilities (e.g., susceptibility to informational masking) in bimodal CI patients.
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Affiliation(s)
- Duo-Duo Tao
- Department of Ear, Nose, and Throat, Shaanxi Provincial People's Hospital, Xi'An, China
| | - Yun-Mei Zhang
- Department of Ear, Nose, and Throat, The First Affiliated Hospital of Soochow University, Suzhou, China
| | - Hui Liu
- Department of Ear, Nose, and Throat, Shaanxi Provincial People's Hospital, Xi'An, China
| | - Wen Zhang
- Department of Ear, Nose, and Throat, Shaanxi Provincial People's Hospital, Xi'An, China
| | - Min Xu
- Department of Ear, Nose, and Throat, Shaanxi Provincial People's Hospital, Xi'An, China
| | - John J Galvin
- House Institute Foundation, Los Angeles, CA, United States
| | - Dan Zhang
- Department of Ear, Nose, and Throat, The First Affiliated Hospital of Soochow University, Suzhou, China
| | - Ji-Sheng Liu
- Department of Ear, Nose, and Throat, The First Affiliated Hospital of Soochow University, Suzhou, China
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Buriti AKL, Gil D. Mild Traumatic Brain Injury: Long-Term Follow-Up of Central Auditory Processing After Auditory Training. J Audiol Otol 2021; 26:22-30. [PMID: 34922419 PMCID: PMC8755437 DOI: 10.7874/jao.2021.00360] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/14/2021] [Accepted: 09/06/2021] [Indexed: 11/22/2022] Open
Abstract
Background and Objectives Even a mild traumatic brain injury can impair the peripheral and central parts of the auditory system. The objective was to compare the performance of individuals with mild traumatic brain injury in behavioral and electrophysiological central auditory tests before and after formal auditory training, and to verify the stability of these measures over time. Subjects and Methods Ten 16- to 64-year-old individuals diagnosed with mild traumatic brain injury underwent behavioral and electrophysiological assessment of the central auditory processing in three stages: before, right after, and six months after formal auditory training. Results Statistically significant differences were observed for speech by white noise, synthetic sentence identification, sound localization, verbal sequential memory, and duration pattern tests in the assessment six months after formal auditory training. No statistically significant differences were observed between the P300 assessments, either with tone-burst or speech stimulus, in N2 and P3 latencies, and P3 amplitude. Conclusions The results of the behavioral assessment of the central auditory processing improved, while the P300 remained stable with both stimuli, six months after completing formal auditory training. This demonstrates that auditory training has long-term benefits for people with mild traumatic brain injury.
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Affiliation(s)
- Ana Karina Lima Buriti
- Department of Speech, Language and Hearing Disorders (Fonoaudiologia), Universidade Federal de São Paulo (UNIFESP), São Paulo, Brazil
| | - Daniela Gil
- Department of Speech, Language and Hearing Disorders (Fonoaudiologia), Universidade Federal de São Paulo (UNIFESP), São Paulo, Brazil
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Pike M, Biagio-de Jager L, le Roux T, Hofmeyr LM. Short-Term Test-Retest Reliability of Electrically Evoked Cortical Auditory Potentials in Adult Cochlear Implant Recipients. Front Neurol 2020; 11:305. [PMID: 32411080 PMCID: PMC7198904 DOI: 10.3389/fneur.2020.00305] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/03/2019] [Accepted: 03/30/2020] [Indexed: 11/13/2022] Open
Abstract
Background: Late latency auditory evoked potentials (LLAEPs) provide objective evidence of an individual's central auditory processing abilities. Electrically evoked cortical auditory evoked potentials (eCAEPs) are a type of LLAEP that provides an objective measure of aided speech perception and auditory processing abilities in cochlear implant (CI) recipients. Aim: To determine the short-term test-retest reliability of eCAEPs in adult CI recipients. Design: An explorative, within-subject repeated measures research design was employed. Study Sample: The study sample included 12 post-lingually deafened, unilaterally implanted adult CI recipients with at least 9 months of CI experience. Method: eCAEPs representing basal, medial and apical cochlear regions were recorded in the implanted ears of each participant. Measurements were repeated 7 days after the initial assessment. Results: No significant differences between either median latencies or amplitudes at test and retest sessions (p > 0.05) were found when results for apical, medial and basal electrodes were averaged together. Mean intraclass correlation coefficient (ICC) scores averaged across basal, medial and apical cochlear stimulus regions indicated that both consistency and agreement were statistically significant and ranged from moderate to good (ICC = 0.58-0.86, p < 0.05). ICC confidence intervals did demonstrate considerable individual variability in both latency and amplitudes. Conclusion: eCAEP latencies and amplitudes demonstrated moderate to good short-term test-retest reliability. However, confidence intervals indicated individual variability in measurement consistency which is likely linked to attention and listening effort required from the CI recipients.
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Affiliation(s)
- Meghan Pike
- Department of Speech Language Pathology and Audiology, University of Pretoria, Pretoria, South Africa
| | - Leigh Biagio-de Jager
- Department of Speech Language Pathology and Audiology, University of Pretoria, Pretoria, South Africa
| | - Talita le Roux
- Department of Speech Language Pathology and Audiology, University of Pretoria, Pretoria, South Africa
| | - Louis M Hofmeyr
- Department of Speech Language Pathology and Audiology, University of Pretoria, Pretoria, South Africa
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