Sustained neural rhythms reveal endogenous oscillations supporting speech perception

PLoS Biology, Journal Year: 2021, Volume and Issue: 19(2), P. e3001142 - e3001142

Published: Feb. 26, 2021

Rhythmic sensory or electrical stimulation will produce rhythmic brain responses. These responses are often interpreted as endogenous neural oscillations aligned (or “entrained”) to the stimulus rhythm. However, stimulus-aligned can also be explained a sequence of evoked responses, which only appear regular due rhythmicity stimulus, without necessarily involving underlying oscillations. To distinguish from true oscillatory activity, we tested whether produces continue after end stimulus. Such sustained effects provide evidence for involvement In Experiment 1, found that intelligible, but not unintelligible speech in magnetoencephalography (MEG) outlast at parietal sensors. 2, transcranial alternating current (tACS) leads fluctuations perception outcomes stimulation. We further report phase relation between electroencephalography (EEG) and intelligible predict tACS most accurate perception. Together, fundamental results several lines research—including entrainment tACS—and reveal key principle

Language: Английский

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Strength of low-frequency EEG phase entrainment to external stimuli is associated with fluctuations in the brain’s internal state

eNeuro, Journal Year: 2025, Volume and Issue: unknown, P. ENEURO.0064 - 24.2024

Published: Jan. 8, 2025

The brain attends to environmental rhythms by aligning the phase of internal oscillations. However, factors underlying fluctuations in strength this entrainment remain largely unknown. In present study we examined whether low-frequency EEG rhythmic stimulus sequences varied with pupil size and posterior alpha-band power, thought reflect arousal level excitability cortical areas, respectively. We recorded scalp while participants carried out an intermodal selective attention task, which they were instructed attend a sequence visual or auditory stimuli ignore other perceptual modality. As expected, intertrial coherence (ITC), measure strength, was larger for task-relevant than task-irrelevant Across experiment, alpha power strongly linked each other. Interestingly, ITC tracked both variables: associated increase sequence, whereas decrease sequences. Exploratory analyses showed that temporal relation between emerged time periods around maxima minima. These results indicate endogenous sources contribute distinctly entrainment. Significance statement Fluctuations state powerfully shape perception external stimuli. Understanding physiological signatures is crucial understand how selectively switches content. Here studied two attentional state, pupil-linked band, activity Our reveal common dissociable influences these at slow scales. Furthermore, measuring including as covariates statistical models can help studies focusing on provides new evidence direct influence

Language: Английский

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Decoupling Measurements and Processes: On the Epiphenomenon Debate Surrounding Brain Oscillations in Field Potentials

Published: April 9, 2024

Various theories in neuroscience maintain that brain oscillations have an important role neuronal computation, but opposing views claim these macroscale dynamics are “exhaust fumes” of more relevant processes. Here, we argue the question whether epiphenomenal is ill-defined and cannot be productively resolved without further refinement. Toward end, outline a conceptual framework clarifies dispute along two axes: first, introduce distinction between measurement process to categorize theoretical status electrophysiology terms such as local field potentials oscillations. Second, consider relationships disambiguated terms, evaluating based on experimental computational evidence there exist causal or inferentially useful links them. This decomposes epiphenomenalism into set empirically tractable alternatives. Finally, demarcate conceptually distinct entity where either processes measurements exhibit periodic behavior, suggest oscillatory orchestrate neural computation by implementing temporal, spatial, frequency syntax. Overall, our reframed evaluation supports view electric fields—oscillating not—are causally relevant, their associated signals informative. More broadly, offer vocabulary starting point for scientific exchanges utility biological they capture.

Language: Английский

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Neural entrainment to the beat and working memory predict sensorimotor synchronization skills

Scientific Reports, Journal Year: 2025, Volume and Issue: 15(1)

Published: March 26, 2025

Neural entrainment to rhythmic patterns has been proposed as a mechanism that underlies beat perception and could explain individual differences in sensorimotor synchronization abilities. Nevertheless, the neural cognitive mechanisms behind remain an active research area. Our study examined whether patterns, resources, specifically working memory musical background predict skills adults. Using electroencephalogram (EEG), we recorded steady-state evoked potentials (SS-EPs) while participants passively listened short tone sequences featuring syncopated (tones missing from certain beats) unsyncopated present on every beat) rhythms. Participants also completed finger-tapping task, measuring tapping consistency asynchrony, counting span task assess memory. Results showed increased at beat-related frequencies (1.25 Hz its harmonics, 2.10/2.50 Hz, 5 Hz), indicating faithful tracking of Contrary expectations, stronger rhythms was associated with greater variability lower accuracy. In contrast, capacity positively predicted consistency, suggesting automatic beat-based predictions reflected may reduce flexibility needed for rhythm production. Musical not significant predictor performance, support production by maintaining internal representations time intervals. results challenged assumption universally enhances highlighted multidimensionality processing, complex relationship between entrainment, skills.

Language: Английский

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Beat processing in newborn infants cannot be explained by statistical learning based on transition probabilities

Cognition, Journal Year: 2023, Volume and Issue: 243, P. 105670 - 105670

Published: Nov. 27, 2023

Newborn infants have been shown to extract temporal regularities from sound sequences, both in the form of learning regular sequential properties, and extracting periodicity input, commonly referred as a pulse or 'beat'. However, these two types are often indistinguishable isochronous statistical beat perception can be elicited by alternation accented unaccented sounds. Here, we manipulated isochrony sequences order disentangle sleeping newborn an EEG experiment, previously done adults macaque monkeys. We used binary sequence that induces when presented with timing, but not randomly jittered timing. compared mismatch responses infrequent deviants falling on either (i.e., odd even) positions. Results showed clear difference between metrical positions sequence, equivalent sequence. This suggests processing is present newborns. Despite previous evidence for newborns effects this ability were detected condition. These results show itself does fully explain infants.

Language: Английский

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Social interaction links active musical rhythm engagement and expressive communication in autistic toddlers

Autism Research, Journal Year: 2024, Volume and Issue: 17(2), P. 338 - 354

Published: Jan. 10, 2024

Abstract Rhythm is implicated in both social and linguistic development. perception production skills are also key vulnerabilities neurodevelopmental disorders such as autism which impact communication. However, direct links between musical rhythm engagement expressive communication not clearly evident. This absence of a connection indicates that the mechanism action may recruit other cognitive or developmental factors. We hypothesized interactions, including general interpersonal relationships interactive music‐making involving children caregivers, were significant factor, particularly autism. To test this, we collected data from parents autistic nonautistic 14–36 months age, parent reports their children's rhythmic engagement, skills, parent–child skills. Path analysis revealed system independent, indirect pathways to via interactions toddlers. Such implies represent crucial language different kinds play parallel, independent roles linking with

Language: Английский

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What is a Rhythm for the Brain? The Impact of Contextual Temporal Variability on Auditory Perception

Journal of Cognition, Journal Year: 2024, Volume and Issue: 7(1), P. 15 - 15

Published: Jan. 17, 2024

Temporal predictions can be formed and impact perception when sensory timing is fully predictable: for instance, the discrimination of a target sound enhanced if it presented on beat an isochronous rhythm. However, natural stimuli, like speech or music, are not entirely predictable, but still possess statistical temporal regularities. We investigated whether expectations in non-fully predictable contexts, how variability contexts affects auditory perception. Specifically, we asked “rhythmic” stimulation needs to order observe effects performances. In this behavioral oddball experiment, participants listened sequences where interval between each was drawn from gaussian distributions with distinct standard deviations. Participants were discriminate sounds deviant pitch sequences. Auditory performances, as measured accuracy response times, progressively declined sequence increased. Moreover, both global local statistics impacted perception, suggesting that promptly integrated optimize Altogether, these results suggests set up quickly based past events robust certain amount variability. Therefore, built stimulations purely periodic nor temporally deterministic.

Language: Английский

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Probing Beat Perception with Event-Related Potentials (ERPs) in Human Adults, Newborns, and Nonhuman Primates

Advances in experimental medicine and biology, Journal Year: 2024, Volume and Issue: unknown, P. 227 - 256

Published: Jan. 1, 2024

Language: Английский

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Response to commentaries by Schmidt and Kaplan, Penhune, Hickok and Theofanopoulou on “Beat-based dancing to music has evolutionary foundations in advanced vocal learning.”

BMC Neuroscience, Journal Year: 2024, Volume and Issue: 25(1)

Published: Nov. 6, 2024

Abstract Each commentary on my article raises important points and new ideas for research rhythmic processing in humans other species. Here I respond to concerning the role of social factors ontogeny beat synchronization, neural connectivity underlying evolution this connectivity, mechanisms by which evolutionary changes strength one white matter tract (driven natural selection) can have knock-on effects structure an adjacent tract.

Language: Английский

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Neural tracking of continuous acoustics: properties, speech‐specificity and open questions

European Journal of Neuroscience, Journal Year: 2023, Volume and Issue: 59(3), P. 394 - 414

Published: Dec. 27, 2023

Abstract Human speech is a particularly relevant acoustic stimulus for our species, due to its role of information transmission during communication. Speech inherently dynamic signal, and recent line research focused on neural activity following the temporal structure speech. We review findings that characterise dynamics in processing continuous acoustics allow us compare these with aspects human highlight properties constraints both have, suggesting auditory systems are optimised process then discuss speech‐specificity their potential mechanistic origins summarise open questions field.

Language: Английский

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