Exploring neural tracking of acoustic and linguistic speech representations in individuals with post‐stroke aphasia

Human Brain Mapping, Journal Year: 2024, Volume and Issue: 45(8)

Published: May 26, 2024

Abstract Aphasia is a communication disorder that affects processing of language at different levels (e.g., acoustic, phonological, semantic). Recording brain activity via Electroencephalography while people listen to continuous story allows analyze responses acoustic and linguistic properties speech. When the neural aligns with these speech properties, it referred as tracking. Even though measuring tracking may present an interesting approach studying aphasia in ecologically valid way, has not yet been investigated individuals stroke‐induced aphasia. Here, we explored representations chronic phase after stroke age‐matched healthy controls. We found decreased (envelope envelope onsets) In addition, word surprisal displayed amplitudes around 195 ms over frontal electrodes, although this effect was corrected for multiple comparisons. These results show there potential capture impairments by However, more research needed validate results. Nonetheless, exploratory study shows naturalistic, presents powerful

Language: Английский

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Neural envelope tracking predicts speech intelligibility and hearing aid benefit in children with hearing loss

Hearing Research, Journal Year: 2023, Volume and Issue: 439, P. 108893 - 108893

Published: Oct. 4, 2023

Language: Английский

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The effects of data quantity on performance of temporal response function analyses of natural speech processing

Frontiers in Neuroscience, Journal Year: 2023, Volume and Issue: 16

Published: Jan. 12, 2023

In recent years, temporal response function (TRF) analyses of neural activity recordings evoked by continuous naturalistic stimuli have become increasingly popular for characterizing properties within the auditory hierarchy. However, despite this rise in TRF usage, relatively few educational resources these tools exist. Here we use a dual-talker speech paradigm to demonstrate how key parameter experimental design, quantity acquired data, influences fit either individual data (subject-specific analyses), or group (generic analyses). We show that although model prediction accuracy increases monotonically with quantity, amount required achieve significant accuracies can vary substantially based on whether fitted contains densely (e.g., acoustic envelope) sparsely lexical surprisal) spaced features, especially when goal is capture aspect responses uniquely explained specific features. Moreover, generic models exhibit high performance small amounts test (2–8 min), if they are trained sufficiently large set. As such, may be particularly useful clinical and multi-task study designs limited recording time. Finally, regularization procedure used fitting interact models, larger training quantities resulting systematically amplitudes. Together, demonstrations work should aid new users analyses, combination other tools, such as piloting power serve detailed reference choosing acquisition duration future studies.

Language: Английский

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Beyond linear neural envelope tracking: a mutual information approach

Journal of Neural Engineering, Journal Year: 2023, Volume and Issue: 20(2), P. 026007 - 026007

Published: Feb. 22, 2023

Objective.The human brain tracks the temporal envelope of speech, which contains essential cues for speech understanding. Linear models are most common tool to study neural tracking. However, information on how is processed can be lost since nonlinear relations precluded. Analysis based mutual (MI), other hand, detect both linear and gradually becoming more popular in field Yet, several different approaches calculating MI applied with no consensus approach use. Furthermore, added value techniques remains a subject debate field. The present paper aims resolve these open questions.Approach.We analyzed electroencephalography (EEG) data participants listening continuous analyses models.Main results.Comparing approaches, we conclude that results reliable robust using Gaussian copula approach, first transforms standard Gaussians. With this analysis valid technique studying Like models, it allows spatial interpretations processing, peak latency analyses, applications multiple EEG channels combined. In final analysis, tested whether components were response by removing all data. We robustly detected single-subject level analysis.Significance.We demonstrate processes way. Unlike detects such relations, proving its addition, retains characteristics an advantage when complex (nonlinear) deep networks.

Language: Английский

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Effects of aging on cortical representations of continuous speech

Journal of Neurophysiology, Journal Year: 2023, Volume and Issue: 129(6), P. 1359 - 1377

Published: April 25, 2023

We observed age-related changes in cortical temporal processing of continuous speech that may be related to older adults’ difficulty understanding noise. These occur both timing and strength the representations at different stages depend on noise condition selective attention. Critically, their dependence dramatically among early, middle, late stages, underscoring how aging differentially affects these stages.

Language: Английский

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Effects of linguistic context and noise type on speech comprehension

Frontiers in Psychology, Journal Year: 2024, Volume and Issue: 15

Published: Feb. 5, 2024

Introduction Understanding speech in background noise is an effortful endeavor. When acoustic challenges arise, linguistic context may help us fill perceptual gaps. However, more knowledge needed regarding how different types of affect our ability to construct meaning from perceptually complex input. Additionally, there limited evidence whether complexity (e.g., informational masking) and occurrence contextually incongruous words) interact during processing material that longer than a single sentence. Our first research objective was determine comprehension spoken sentence pairs impacted by the masking masker. second identify interaction between processing. Methods We used multiple measures including accuracy, reaction time, effort (as indicated task-evoked pupil response), making comparisons across three levels two conditions. Context conditions varied final word, with each pair ending expected exemplar (EE), within-category violation (WV), or between-category (BV). Forty young adults typical hearing performed task over visits. Each participant heard presented either multi-talker babble spectrally shaped steady-state (SSN), same condition all Results observed effect but not on accuracy. Further, we peak dilation data. Specifically, modulated type: facilitated only condition. Discussion These findings suggest when arises, listeners make use facilitate obscured noise. results extend existing accounts demonstrating engage higher-level processes, such as construction segments are

Language: Английский

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Age-related neural changes underlying long-term recognition of musical sequences

Communications Biology, Journal Year: 2024, Volume and Issue: 7(1)

Published: Aug. 29, 2024

Aging is often associated with decline in brain processing power and neural predictive capabilities. To challenge this notion, we used magnetoencephalography (MEG) magnetic resonance imaging (MRI) to record the whole-brain activity of 39 older adults (over 60 years old) 37 young (aged 18-25 years) during recognition previously memorised varied musical sequences. Results reveal that when recognising sequences, compared reshapes its functional organisation. In fact, it shows increased early sensory regions such as left auditory cortex (100 ms 250 after each note), only moderate decreased (350 ms) medial temporal lobe prefrontal regions. When show a marked reduction fast-scale functionality (250 note) higher-order including hippocampus, ventromedial inferior cortices, while no differences are observed cortex. Accordingly, outperform novel behavioural regards ones. Our findings age-related changes memory processes, integrating existing theories on compensatory mechanisms non-pathological aging.

Language: Английский

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Neural tracking of natural speech: an effective marker for post-stroke aphasia

Brain Communications, Journal Year: 2025, Volume and Issue: 7(2)

Published: Jan. 1, 2025

Abstract After a stroke, approximately one-third of patients suffer from aphasia, language disorder that impairs communication ability. Behavioural tests are the current standard to detect but they time-consuming, have limited ecological validity and require active patient cooperation. To address these limitations, we tested potential EEG-based neural envelope tracking natural speech. The technique investigates response temporal speech, which is critical for speech understanding by encompassing cues detecting segmenting linguistic units (e.g. phrases, words phonemes). We recorded EEG 26 individuals with aphasia in chronic phase after stroke (>6 months post-stroke) 22 healthy controls while listened 25-min story. quantified broadband frequency range as well delta, theta, alpha, beta gamma bands using mutual information analyses. Besides group differences measures, also its suitability at individual level support vector machine classifier. further investigated reliability required recording length accurate detection. Our results showed had decreased encoding compared broad, theta bands, aligns assumed role auditory processing Neural effectively captured level, classification accuracy 83.33% an area under curve 89.16%. Moreover, demonstrated high-accuracy detection can be achieved time-efficient (5–7 min) highly reliable manner (split-half correlations between R = 0.61 0.96 across bands). In this study, identified specific characteristics impaired holding promise biomarker condition. Furthermore, demonstrate discriminate high accuracy, manner. findings represent significant advance towards more automated, objective ecologically valid assessments impairments aphasia.

Language: Английский

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Speech Reception Threshold Estimation via EEG‐Based Continuous Speech Envelope Reconstruction

European Journal of Neuroscience, Journal Year: 2025, Volume and Issue: 61(6)

Published: March 1, 2025

ABSTRACT This study investigates the potential of speech reception threshold (SRT) estimation through electroencephalography (EEG) based envelope reconstruction techniques with continuous speech. Additionally, we investigate influence stimuli's signal‐to‐noise ratio (SNR) on temporal response function (TRF). Twenty young normal‐hearing participants listened to audiobook excerpts varying background noise levels while EEG was recorded. A linear decoder trained reconstruct from data. The accuracy calculated as Pearson's correlation between reconstructed and actual envelopes. An SRT estimate (SRT neuro ) obtained midpoint a sigmoid fitted versus SNR data points. TRF estimated at each level, followed by statistical analysis reveal significant effects latencies amplitudes most prominent components. within 3 dB behavioral for all participants. showed latency decrease N1 P2 amplitude magnitude increase increasing SNR. results suggest that both components are influenced changes in SNR, indicating they may be linked same underlying neural process.

Language: Английский

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Повышение образовательного потенциала у детей с расстройствами аутистического спектра: преодоление семантико-прагматических нарушений речи

ΠΡΑΞΗMΑ Journal of Visual Semiotics, Journal Year: 2025, Volume and Issue: 1(43), P. 93 - 116

Published: March 27, 2025

Упорядочены результаты семиотических измерений в исследованиях дошкольников с расстройствами аутистического спектра (РАС). Цель проведённого упорядочения – нахождение эффективных мер для повышения образовательного потенциала у детей РАС. Результатом стало выяснение ключевой проблемы, а именно преодоления семантико-прагматических нарушений речи детей, которых речь не является средством общения, что порождает разнообразные коммуникативные дефициты (понимание намерений других людей, интерпретация вербальных и невербальных компонент общения др.) и, сущности, препятствует развитию дошкольников. Своевременное выявление уровня семантико-прагматического развития определяется спецификой неоднородностью диагностического инструментария. Следовательно, коррекция семантически-прагматических РАС залогом их потенциала, позволит осваивать навыки, также овладевать способами регулирования своего поведения эмоционального состояния. Результатами предпринятого стали основных установок организации образовательной среды конкретизация, представленная виде таблиц. Сделаны выводы о необходимости: 1) расширения применения визуализаций коррекционной практике; 2) гибкого методик, поскольку каждый ребенок уникален; 3) реализации инициатив педагогической биоэтики, релевантных уникальности таких детей. The study was preceded by the following interpretation of problem. For children with autism spectrum disorders (ASD), verbal language is either not a means communication or preferred communication, but other languages (visual, mathematics music) perform this function, so task mastering similar to music who do have inclinations and abilities for them. A conducted on use methods implemented in work some cities Belarus Russia. aim organize at three levels: characterization speech disorders, effectiveness diagnosing combination increasing educational potential ASD. first level organization based analysis heterogeneous conclusions psychological semiotic theories that concern production perception speech. result establishment main communicative deficits caused difficulty ASD recognize context situation. authors assessed conclusion as basis relevance combining contextual approaches their (the approach conceptual version “semiotic diagnostics”). second ordering carried out when assessing diagnostic methods, which presented article tabular forms (1.1–1.2). results undertaken were identification attitudes environment ASD: “communicative development”, “social integration” “cognitive formation”. relationship interdependence these areas allowed another tables 2.1–2.3). Conclusions are made about deficiencies and, consequently, need replenish deficiencies. This replenishment possible application methodology visual semiotics, specifically procedures diagnostics”, will allow (1) broader visualizations correctional practice; (2) flexible since each child unique; (3) implementation “pedagogical bioethics” initiatives relevant uniqueness such children.

Language: Русский

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