Bharath Chandrasekaran

Motor signals modulate cortical but not subcortical processing of self-initiated sounds

The paper investigates how motor signals affect auditory processing of self-initiated sounds, finding that motor-induced suppression occurs in cortical signals but not in frequency following responses.

Neurophysiological Evidence for Reduced Use of Prior Sound Patterns to Shape Speech Processing in Autism

This study finds that autistic adults show reduced context-dependent modulation of speech encoding compared to non-autistic adults, linked to differences in auditory and social-communicative function.

Stability of phoneme-related potentials across testing sessions and stimulus presentation conditions

This study evaluates the stability of phoneme-related potentials (PRPs) across different testing conditions and finds they remain stable, suggesting their potential as a reliable measure of speech processing.

Degraded neural coding of temporal fine structure with age predicts effortful listening in multi-talker environments

The paper shows that reduced neural encoding of temporal fine structure in middle age predicts increased listening effort in noisy environments despite normal hearing.

Increased listening effort and cochlear neural degeneration underlie speech-in-noise deficits in normal hearing middle-aged adults

Reduced neural distinctiveness of speech representations in the middle-aged brain

This study shows that middle-aged adults have less distinct neural representations of speech sounds compared to younger adults, even with normal hearing, suggesting age-related cortical dedifferentiation contributes to speech perception decline.

Combining pupillometry and drift-diffusion models reveals auditory category learning dynamics

This study combines pupillometry and drift-diffusion models to analyze auditory category learning dynamics, showing that delayed trials reveal distinct learning markers and DDM parameters.

Functional connectivity across the human subcortical auditory system using an autoregressive matrix-Gaussian copula graphical model approach with partial correlations

This paper estimates functional connectivity in the human subcortical auditory system using a novel autoregressive matrix-Gaussian copula graphical model approach, revealing stable and specific connectivity patterns.

Cortical tracking of continuous speech under bimodal divided attention

This study investigates how bimodal divided attention affects neural processing of continuous speech, finding that behavioral decrements occur at later cognitive stages rather than early sensory processing.

Auditory corticostriatal connections in the human brain

This study maps human auditory corticostriatal connections using high-resolution diffusion MRI, finding preferential connectivity between primary auditory cortex and putamen, but not caudate.

Categorical encoding of voice in human superior temporal cortex

The paper uses human intracerebral recordings to show that voice is encoded categorically in STG and STS, not by acoustic features, and this selectivity increases along the auditory hierarchy.

Separate neural dynamics underlying the acquisition of different auditory category structures

The paper investigates how neural dynamics differ based on auditory category structures during learning, showing distinct spatiotemporal patterns for rule-based and information-integration tasks.

Linear superposition of responses evoked by individual glottal pulses explain over 80% of the frequency following response to human speech in the macaque monkey

The paper uses deconvolution to show that linear superposition of F0 responses explains over 80% of the variance in FFRs to human speech in macaques.

Working memory relates to individual differences in speech category learning: Insights from computational modeling and pupillometry

This study examines how individual differences in working memory affect non-native speech category learning through computational modeling and pupillometry, finding that higher working memory correlates with faster and more effective learning.

Effects of Task Demands on Neural Correlates of Acoustic and Semantic Processing in Challenging Listening Conditions

The paper examines how task demands affect neural correlates of acoustic and semantic processing in noisy listening conditions, finding no correlation between acoustic tracking and semantic processing.

Deconstructing the Cortical Sources of Frequency Following Responses to Speech: A Cross-species Approach

This study investigates cortical sources of frequency following responses (FFRs) to speech across species, finding robust FFRs in auditory cortex and their contribution to scalp-recorded signals.