Short- and long-term neuroplasticity interact during the perceptual learning of concurrent speech

Cerebral Cortex, Journal Year: 2024, Volume and Issue: 34(2)

Published: Jan. 11, 2024

Abstract Plasticity from auditory experience shapes the brain’s encoding and perception of sound. However, whether such long-term plasticity alters trajectory short-term during speech processing has yet to be investigated. Here, we explored neural mechanisms interplay between short- neuroplasticity for rapid perceptual learning concurrent sounds in young, normal-hearing musicians nonmusicians. Participants learned identify double-vowel mixtures ~ 45 min training sessions recorded simultaneously with high-density electroencephalography (EEG). We analyzed frequency-following responses (FFRs) event-related potentials (ERPs) investigate correlates at subcortical cortical levels, respectively. Although both groups showed learning, faster behavioral decisions than nonmusicians overall. Learning-related changes were not apparent brainstem FFRs. was highly evident cortex, where ERPs revealed unique hemispheric asymmetries suggestive different strategies (musicians: right hemisphere bias; nonmusicians: left hemisphere). Source reconstruction early (150–200 ms) time course these effects localized learning-induced auditory-sensory brain areas. Our findings reinforce domain-general benefits musicianship but reveal that successful sound is driven by a critical long- plasticity, which first emerge level.

Language: Английский

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Diverse functions of the auditory cortico-collicular pathway

Hearing Research, Journal Year: 2022, Volume and Issue: 425, P. 108488 - 108488

Published: March 20, 2022

Language: Английский

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Alpha‐Band Brain Activity Shapes Online Perceptual Learning of Concurrent Speech Differentially in Musicians vs. Nonmusicians

European Journal of Neuroscience, Journal Year: 2025, Volume and Issue: 61(9)

Published: April 28, 2025

ABSTRACT Plasticity from auditory experience shapes the brain's encoding and perception of sound. Though stronger neural entrainment (i.e., brain‐to‐acoustic synchronization) aids speech perception, underlying oscillatory activity may uniquely interact with long‐term experiences music training) short‐term plasticity during concurrent perception. Here, we explored rapid perceptual learning sounds in normal‐hearing young adults who differed their amount self‐reported training (defined as “musicians” “nonmusicians”). Participants learned to identify double‐vowel mixtures ~45 min sessions high‐density EEG recordings. We analyzed alpha‐band power (7–12 Hz) following a rhythmic speech‐stimulus train (~9 preceding behavioral identification determine whether increased (brain‐to‐speech entrainment) or decreased alpha (alpha‐band suppression) corresponded task success. Source directed functional connectivity analyses data probed behavior was driven by group differences auditory‐motor coupling. Both groups improved training. Listeners' prior target predicted performance; surprisingly, oscillations were observed incorrect compared correct trial responses. also found stark hemispheric biases coupling, greater right left hemisphere for musicians (R > L) but not nonmusicians = L). Stronger responses supports notion that (~10 suppression is an important modulator trial‐by‐trial success processing. Our findings suggest impact

Language: Английский

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Brain-wide inputs to the non-lemniscal inferior colliculus in mice

Neuroscience Letters, Journal Year: 2022, Volume and Issue: 793, P. 136976 - 136976

Published: Nov. 24, 2022

Language: Английский

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The neural response at the fundamental frequency of speech is modulated by word-level acoustic and linguistic information

Frontiers in Neuroscience, Journal Year: 2022, Volume and Issue: 16

Published: July 22, 2022

Spoken language comprehension requires rapid and continuous integration of information, from lower-level acoustic to higher-level linguistic features. Much this processing occurs in the cerebral cortex. Its neural activity exhibits, for instance, correlates predictive processing, emerging at delays a few 100 ms. However, auditory pathways are also characterized by extensive feedback loops cortical areas ones as well subcortical structures. Early can therefore be influenced cognitive processes, but it remains unclear whether such contributes processing. Here, we investigated early speech-evoked that emerges fundamental frequency. We analyzed EEG recordings obtained when subjects listened story read single speaker. identified response tracking speaker's frequency occurred delay 11 ms, while another elicited high-frequency modulation envelope higher harmonics exhibited larger magnitude longer latency about 18 ms with an additional significant component around 40 Notably, earlier components likely originate structures, latter presumably involves contributions regions. Subsequently, determined these responses each individual word story. then quantified context-independent used model compute context-dependent surprisal precision. The represented how predictable is, given previous context, precision reflected confidence predicting next past context. found word-level were predominantly features: average its variability. Amongst features, only showed weak modulation. Our results show is already suggesting top-down response.

Language: Английский

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“Unattended, distracting or irrelevant”: Theoretical implications of terminological choices in auditory selective attention research

Cognition, Journal Year: 2022, Volume and Issue: 231, P. 105313 - 105313

Published: Nov. 4, 2022

Language: Английский

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Perceptual warping exposes categorical representations for speech in human brainstem responses

NeuroImage, Journal Year: 2023, Volume and Issue: 269, P. 119899 - 119899

Published: Jan. 28, 2023

The brain transforms continuous acoustic events into discrete category representations to downsample the speech signal for our perceptual-cognitive systems. Such phonetic categories are highly malleable, and their percepts can change depending on surrounding stimulus context. Previous work suggests these acoustic-phonetic mapping perceptual warping of emerge in no earlier than auditory cortex. Here, we examined whether auditory-category phenomena inherent perception occur even human brain, at level brainstem. We recorded speech-evoked frequency following responses (FFRs) during a task designed induce more/less listeners' presentation order continuum (random, forward, backward directions). used novel clustered paradigm rapidly record high trial counts needed FFRs concurrent with active behavioral tasks. found serial caused shifts (hysteresis) near boundary confirming identical tokens perceived differentially Critically, further show neural (but not passive) listening enhanced prototypical vs. category-ambiguous biased direction label acoustically-identical stimuli. These findings were observed acoustics nor model FFR generated via computational cochlear nerve transduction, central origin effects. Our data reveal carry category-level information suggest top-down processing actively shapes encoding categorization subcortical levels. surprisingly early along neuroaxis, which might aid understanding by reducing ambiguity signal.

Language: Английский

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Myogenic artifacts masquerade as neuroplasticity in the auditory frequency-following response

Frontiers in Neuroscience, Journal Year: 2024, Volume and Issue: 18

Published: July 8, 2024

The frequency-following response (FFR) is an evoked potential that provides a neural index of complex sound encoding in the brain. FFRs have been widely used to characterize speech and music processing, experience-dependent neuroplasticity (e.g., learning musicianship), biomarkers for hearing language-based disorders distort receptive communication abilities. It assumed stem from mixture phase-locked neurogenic activity brainstem cortical structures along neuraxis. In this study, we challenge prevailing view by demonstrating upwards ~50% FFR can originate unexpected myogenic source: contamination postauricular muscle (PAM) vestigial startle reflex. We measured PAM, transient auditory responses (ABRs), sustained potentials reflecting (ABR/FFR) young, normal-hearing listeners with varying degrees musical training. first establish PAM artifact present all ears, varies electrode proximity muscle, be experimentally manipulated directing listeners' eye gaze toward ear stimulation. then show muscular noise easily confounds FFRs, spuriously amplifying 3–4-fold tandem contraction even explaining putative enhancements observed highly skilled musicians. Our findings expose new unrecognized source drives its large inter-subject variability cast doubt on whether changes typically attributed neuroplasticity/pathology are solely brain origin.

Language: Английский

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Sensory representations and pupil-indexed listening effort provide complementary contributions to multi-talker speech intelligibility

Scientific Reports, Journal Year: 2024, Volume and Issue: 14(1)

Published: Dec. 28, 2024

Language: Английский

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The role of attention in eliciting a musically induced visual motion aftereffect

Attention Perception & Psychophysics, Journal Year: 2025, Volume and Issue: unknown

Published: Jan. 15, 2025

Language: Английский

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