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Functional changes in inter- and intra-hemispheric cortical processing underlying degraded speech perception

Gavin M. Bidelman, Megan Howell
2016 NeuroImage  
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

Leonard Varghese, Hari M. Bharadwaj, Barbara G. Shinn-Cunningham
2015 Brain Research  
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

Gavin M. Bidelman, Joshua W. Villafuerte, Sylvain Moreno, Claude Alain
2014 Neurobiology of Aging  
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

Gavin M. Bidelman
2015 Hearing Research  
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

Anusha Yellamsetty, Gavin M. Bidelman
2019 Brain Research  
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

Gavin M. Bidelman, Claude Alain
2015 Neuropsychologia  
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

Jonathan A. N. Fisher, Iryna Gumenchuk, Ora S. Rogovin, Arjun G. Yodh, David R. Busch
2020 Neurophotonics  
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

Jonathan A N Fisher, Iryna Gumenchuk, Ora S Rogovin, Arjun G Yodh, David R Busch
2020 Neurophotonics  
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

Joel S. Snyder, Claude Alain, Terence W. Picton
2006 Journal of Cognitive Neuroscience  
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]

Gavin Bidelman, Claire Pearson, Ashleigh Harrison
2020 bioRxiv   pre-print
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]

Jonathan A. N. Fisher, Iryna Gumenchuk, Ora Rogovin, Arjun G. Yodh, David R. Busch
2019 bioRxiv   pre-print
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

Joel S. Snyder, Claude Alain
2007 Psychological bulletin  
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

Fatemeh Yavari, Michael A. Nitsche, Hamed Ekhtiari
2017 Frontiers in Human Neuroscience  
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]

Jesyin Lai, Caitlin N Price, Gavin M Bidelman
2022 bioRxiv   pre-print
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

M. N. O'Connell, A. Barczak, D. Ross, T. McGinnis, C. E. Schroeder, P. Lakatos
2015 Frontiers in Human Neuroscience  
(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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