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Functional changes in inter- and intra-hemispheric cortical processing underlying degraded speech perception
2016
NeuroImage
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In contrast, auditory sources showed more resilience to noise in left compared to right primary auditory cortex but also a progressive shift in dominance from left to right hemisphere at lower SNRs. ...
To better elucidate the brain basis of SIN perception, we recorded neuroelectric activity in normal hearing listeners to speech sounds presented at various SNRs. ...
Acknowledgments This work was supported by grants from the American Hearing Research Foundation (AHRF) and American Academy of Audiology Foundation (AAAF) awarded to G.M.B.
Appendix A. ...
doi:10.1016/j.neuroimage.2015.09.020
pmid:26386346
fatcat:ktta37gbx5avdnqstkkee62kbq
Evidence against attentional state modulating scalp-recorded auditory brainstem steady-state responses
2015
Brain Research
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Envelope-following response Attention Auditory processing a b s t r a c t Auditory brainstem responses (ABRs) and their steady-state counterpart (subcortical steady-state responses, SSSRs) are generally ...
Here, we explored whether attentional focus affects the envelope-following response (EFR), which is a particular kind of SSSR, and if so, whether the effects are specific to which sound elements in a sound ...
The authors wish to thank Scott Bressler for his assistance in designing the stimuli used in this experiment. The authors would also like to thank Lorraine Delhorne for performing ...
doi:10.1016/j.brainres.2015.06.038
pmid:26187756
pmcid:PMC5645016
fatcat:72qx6a4yh5g6plwzqvns6avbim
Age-related changes in the subcortical–cortical encoding and categorical perception of speech
2014
Neurobiology of Aging
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Categorical speech perception Brainstem frequency-following response (FFR) Mutual information (MI) Speech perception Brain signal variability a b s t r a c t Aging is associated with declines in auditory ...
Here, we evaluated both brainstem and cortical speech-evoked brain responses to elucidate how aging impacts the neural transcription and transfer of speech information between functional levels of the ...
Correspondence and requests for materials should be addressed to Gavin M. Bidelman (g.bidelman@memphis.edu). ...
doi:10.1016/j.neurobiolaging.2014.05.006
pmid:24908166
fatcat:5gtcts5i25dwnpszqx5awj6ep4
Multichannel recordings of the human brainstem frequency-following response: Scalp topography, source generators, and distinctions from the transient ABR
2015
Hearing Research
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Brainstem frequency-following responses (FFRs) probe the neural transcription of speech/music, auditory disorders, and plasticity in subcortical auditory function. ...
Additionally, transient auditory brainstem responses (ABRs), recorded in the same listeners, were used to predict FFRs and test the long-held assumption that the sustained potential reflects a series of ...
of Memphis and grants from the American Hearing Research (AHRF) and American Academy of Audiology (AAA) Foundations awarded to G.M.B. ...
doi:10.1016/j.heares.2015.01.011
pmid:25660195
fatcat:eow3nhtaavbxhnb3cfgzwsknku
Brainstem correlates of concurrent speech identification in adverse listening conditions
2019
Brain Research
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To this end, we measured scalp-recorded frequency-following responses (FFR) from the EEG while human listeners heard two concurrently presented, steady-state (time-invariant) vowels whose F0 differed by ...
Speech perception is also hindered by the signal-to-noise ratio (SNR). ...
Above the F0s used here (150 Hz), only subcortical (brainstem) sources contribute to the FFR (Bidelman, 2018) . ...
doi:10.1016/j.brainres.2019.02.025
pmid:30796895
pmcid:PMC6727209
fatcat:elii4jj7sbhmfazbzxpbsz24wi
Hierarchical neurocomputations underlying concurrent sound segregation: Connecting periphery to percept
2015
Neuropsychologia
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As then indexed by auditory cortical responses, (in)harmonicity is coded in the signature and magnitude of the cortical object-related negativity (ORN) response (150-200 ms). ...
Subcortical activity correlated with cortical evoked responses such that weaker phase-locked brainstem responses (lower neural harmonicity) generated larger ORN amplitude, reflecting the cortical registration ...
awarded to C.A. and the American Hearing Research Foundation (AHRF) and American Academy of Audiology Foundation (AAF) awarded to G.M.B. ...
doi:10.1016/j.neuropsychologia.2014.12.020
pmid:25542675
fatcat:r66bawrfhff57gqseexqf3ck6y
Asymmetric, dynamic adaptation in prefrontal cortex during dichotic listening tasks
2020
Neurophotonics
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Significance: Speech processing tasks can be used to assess the integrity and health of many functional and structural aspects of the brain. ...
To our knowledge, these results additionally represent the first direct measurements of CBF during a speech processing task recommended by the American Speech-Language-Hearing Association for diagnosing ...
Parthasarathy for technical assistance with the optical apparatus. We additionally thank Dr. H. Jang for assistance developing the experimental protocol. ...
doi:10.1117/1.nph.7.4.045008
fatcat:xv3reopz2fch7h2tmkkdv4w6xm
Asymmetric, dynamic adaptation in prefrontal cortex during dichotic listening tasks
2020
Neurophotonics
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Significance: Speech processing tasks can be used to assess the integrity and health of many functional and structural aspects of the brain. ...
To our knowledge, these results additionally represent the first direct measurements of CBF during a speech processing task recommended by the American Speech-Language-Hearing Association for diagnosing ...
Parthasarathy for technical assistance with the optical apparatus. We additionally thank Dr. H. Jang for assistance developing the experimental protocol. ...
doi:10.1117/1.nph.7.4.045008
pmid:33163546
pmcid:PMC7641958
fatcat:rxsn7jhtiref7ljgpbvnd3lgha
Effects of Attention on Neuroelectric Correlates of Auditory Stream Segregation
2006
Journal of Cognitive Neuroscience
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In both listening conditions, an enhancement of the auditory-evoked response (P1-N1-P2 and N1c) to the B tone varied with Áf and correlated with perception of streaming. ...
Sources in Heschl's gyrus accounted for the ERP modulations related to Áf-based segregation and buildup. ...
Additional inhibitory processes between neurons responsive to different frequencies in the auditory cortex have been proposed to enhance frequency-based segregation (Bee & Klump, 2004; Fishman et al., ...
doi:10.1162/089892906775250021
pmid:16417678
fatcat:ptgpfuik4nc57nix3rmzzfgj2q
Lexical influences on categorical speech perception are driven by a temporoparietal circuit
[article]
2020
bioRxiv
pre-print
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Here, we exploited the temporal sensitivity of EEG to resolve the spatiotemporal dynamics of these context-related influences on speech categorization. ...
Our findings confirm lexical status rapidly constrains sub-lexical categorical representations for speech within several hundred milliseconds but likely does so outside the purview of canonical "auditory-linguistic ...
Subcortical sources dominate the neuroelectric auditory frequency-following 525 response to speech. Neuroimage 175, 56-69.
526 Bidelman, G.M., Bush, L.C., Boudreaux, A.M., 2020. ...
doi:10.1101/2020.08.11.246793
fatcat:7rbtmnhpdrhntn7xitp3f4fsdm
Asymmetric, dynamic adaptation in prefrontal cortex during dichotic listening tasks
[article]
2019
bioRxiv
pre-print
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Superficially, this finding is counterintuitive given the left hemisphere's dominance for speech and language. ...
Accordingly, performance on complex speech processing tasks such as dichotic listening can be used to assess the integrity and health of many functional and structural aspects of the brain. ...
Parthasarathy for technical assistance with the optical apparatus. We additionally thank Dr. H. Jang for assistance developing the experimental protocol. ...
doi:10.1101/683987
fatcat:3t45paxjnfh45kwgkuojrtiaqa
Toward a neurophysiological theory of auditory stream segregation
2007
Psychological bulletin
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On the basis of these studies, segregation of sounds is likely to occur beginning in the auditory periphery and continuing at least to primary auditory cortex for simple cues such as pure-tone frequency ...
Auditory stream segregation (or streaming) is a phenomenon in which 2 or more repeating sounds differing in at least 1 acoustic attribute are perceived as 2 or more separate sound sources (i.e., streams ...
The goal of auditory scene analysis is to segregate sounds that arise from different environmental sound sources and form internal represen-tations of auditory objects or streams, such as a friend's speech ...
doi:10.1037/0033-2909.133.5.780
pmid:17723030
fatcat:ms4zqbydjjhehj2ktsvfcsju7m
Transcranial Electric Stimulation for Precision Medicine: A Spatiomechanistic Framework
2017
Frontiers in Human Neuroscience
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Three levels refer to the spatial resolution (local, small-scale networks and large-scale networks) and three levels of tES modulatory effects based on its mechanisms of action (neurochemical, neuroelectrical ...
to design individualized protocols for tES in the context of precision medicine in the future. ...
They simulated the response of a population of neurons oscillating with alpha frequency (10 Hz) to transcranial sinusoidal stimulation with frequencies from 4 Hz to 16 Hz. ...
doi:10.3389/fnhum.2017.00159
pmid:28450832
pmcid:PMC5390027
fatcat:6dlnztltxzg3fmfxi2cwttnaxe
Brainstem speech encoding is dynamically shaped online by fluctuations in cortical α state
[article]
2022
bioRxiv
pre-print
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When speech-evoked brainstem frequency-following responses (FFRs) were categorized according to their α states, low α FFRs in noise were found to be weaker, correlated positively with behavioral response ...
Yet, the role of the descending (corticofugal) auditory system in modulating earlier sound processing in humans during speech perception remains unclear. ...
Acknowledgments This work was supported by the National Institutes of Health (NIH/NIDCD R01DC016267) (G.M.B.). 12 ...
doi:10.1101/2022.04.11.487894
fatcat:5pc25fvaareq3hw2vstojrrgkm
Multi-Scale Entrainment of Coupled Neuronal Oscillations in Primary Auditory Cortex
2015
Frontiers in Human Neuroscience
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(A1) entrain to stimulation in a frequency dependent way that sharpens frequency tuning. ...
Regardless of the phase or frequency, entrainment appeared stronger in left A1, indicative of the hemispheric lateralization of auditory function. ...
in the frequency composition of the auditory environment should ideally take place before this stage, in primary auditory cortex (A1) and subcortical structures. ...
doi:10.3389/fnhum.2015.00655
pmid:26696866
pmcid:PMC4673342
fatcat:kwql4afuirey7i6ex7el6fu6n4
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