Cited by 141Neural dynamics and brain functionNeurobiology of Language and BilingualismNeuroscience and Music Perception

The Human Neural Alpha Response to Speech is a Proxy of Attentional Control

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Wöstmann, Malte, Lim, Sung-Joo, Obleser, Jonas·2017·Cerebral Cortex

Abstract

Human alpha (~10 Hz) oscillatory power is a prominent neural marker of cognitive effort. When listeners attempt to process and retain acoustically degraded speech, alpha power enhances. It is unclear whether these alpha modulations reflect the degree of acoustic degradation per se or the degradation-driven demand to a listener's attentional control. Using an irrelevant-speech paradigm and measuring the electroencephalogram (EEG), the current experiment demonstrates that the neural alpha response to speech is a surprisingly clear proxy of top-down control, entirely driven by the listening goals of attending versus ignoring degraded speech. While (n = 23) listeners retained the serial order of 9 to-be-recalled digits, one to-be-ignored sentence was presented. Distractibility of the to-be-ignored sentence parametrically varied in acoustic detail (noise-vocoding), with more acoustic detail of distracting speech increasingly disrupting listeners' serial memory recall. Where previous studies had observed decreases in parietal and auditory alpha power with more acoustic detail (of target speech), alpha power here showed the opposite pattern and increased with more acoustic detail in the speech distractor. In sum, the neural alpha response reflects almost exclusively a listener's goal, which is decisive for whether more acoustic detail facilitates comprehension (of attended speech) or enhances distraction (of ignored speech).

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  • Alpha oscillations have been associated with temporal integration, attentional control of speech processing, and verbal fluency.

    “For example, alpha oscillations have been associated with temporal integration [45, 46], attentional control of speech processing [47], and verbal fluency [48].”

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Authors
Wöstmann, M., Lim, S.-J., & Obleser, J.
Affiliations
University of Lübeck (DE)
Corresponding author
Wöstmann, Malte
Venue
Cerebral Cortex
Published
2017-03-18
Volume
27
Issue
6
Pages
3307-3317
ISSN
  • 1047-3211 (ISSN-L)
  • 1460-2199
OpenAlex
W2596892521
Cited by
141
References
63
Citations by year
2026: 9 · 2025: 17 · 2024: 20 · 2023: 15 · 2022: 17 · 2021: 20 · 2020: 12 · 2019: 13 · 2018: 13 · 2017: 4
FWCI
6.60
Type
journal article
Language
en
Open access
Locations
  • Cerebral Cortex (publishedVersion)
  • PubMed (publishedVersion)
Funders
ERC Volkswagen (ERC-CoG-2014 AUDADAPT, BIT-CHAT)
Topics
  • Life Sciences › Neuroscience › Cognitive Neuroscience › Neural dynamics and brain function
  • Life Sciences › Neuroscience › Cognitive Neuroscience › Neurobiology of Language and Bilingualism
  • Life Sciences › Neuroscience › Cognitive Neuroscience › Neuroscience and Music Perception
Keywords
alpha oscillations, speech perception, attentional control, top-down control, acoustic degradation, noise-vocoded speech, serial order memory, distractibility, cognitive effort, auditory cortex
MeSH terms
Acoustic Stimulation, Acoustics, Adult, Alpha Rhythm, Analysis of Variance, Attention, Brain Mapping, Electroencephalography, Female, Humans, Male, Memory, Short-Term, Reaction Time, Speech Perception, Statistics as Topic, Comprehension, Young Adult

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