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ColumnTransformer & OneHotEncoder for Multiple Categorical Features.OneHotEncoder for Single Categorical Feature.Our data provide new evidence for online corticofugal interplay in humans and establish that brainstem sensory representations are continuously yoked to (i.e., modulated by) the ebb and flow of cortical states to dynamically update perceptual processing.Īttention and arousal Cortical EEG Frequency-following responses.Ĭopyright © 2022. When speech-evoked brainstem frequency-following responses (FFRs) were categorized according to cortical α states, we found low α FFRs in noise were weaker, correlated positively with behavioral response times, and were more "decodable" via neural classifiers. We hypothesized brainstem speech coding might be tied to attention and arousal states (indexed by cortical α power) that actively modulate the interplay of brainstem-cortical signal processing. Here, we measured EEG activity as listeners performed speech identification tasks in different noise backgrounds designed to tax perceptual and attentional processing. Yet, the role of the descending (corticofugal) auditory system in modulating earlier sound processing in humans during speech perception remains unclear. Electronic address: evidence in animals demonstrates cortical neurons innervate subcortex bilaterally to tune brainstem auditory coding. 3 Institute for Intelligent Systems, University of Memphis, Memphis, TN, USA School of Communication Sciences and Disorders, University of Memphis, Memphis, TN, USA Department of Speech, Language and Hearing Sciences, Indiana University, 2631 East Discovery Parkway, Bloomington, IN 47408, USA Program in Neuroscience, Indiana University, 1101 E 10th St, Bloomington, IN 47405, USA.Electronic address: 2 Institute for Intelligent Systems, University of Memphis, Memphis, TN, USA School of Communication Sciences and Disorders, University of Memphis, Memphis, TN, USA Department of Audiology and Speech Pathology, University of Arkansas for Medical Sciences, Little Rock, AR, USA.

Jude Children's Research Hospital, Memphis, TN, USA.

1 Institute for Intelligent Systems, University of Memphis, Memphis, TN, USA School of Communication Sciences and Disorders, University of Memphis, Memphis, TN, USA Diagnostic Imaging Department, St.