An ERD mapping study of the neurocognitive processes involved in the perceptual and semantic analysis of environmental sounds and words

Lebrun, N.; Clochon, Patrice; Etevenon, P.; Lambert, Jacques; Eustache, Francis

doi:10.1016/s0926-6410(00)00078-1

Cited by 15 publications

(16 citation statements)

References 74 publications

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“…Intriguingly, a previous ERD mapping study reported an enhanced beta-band suppression in response to words over fronto-temporal electrodes roughly similar to the anterior channels showing most vigorous responses in present MEG data [24]. Roughly the same brain region has been involved in tasks requiring auditory working memory [32,33].…”

Section: Discussionsupporting

confidence: 67%

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Perception of acoustically complex phonological features in vowels is reflected in the induced brain-magnetic activity

Eulitz

Obleser

2007

Behav Brain Funct

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A central issue in speech recognition is which basic units of speech are extracted by the auditory system and used for lexical access. One suggestion is that complex acoustic-phonetic information is mapped onto abstract phonological representations of speech and that a finite set of phonological features is used to guide speech perception. Previous studies analyzing the N1m component of the auditory evoked field have shown that this holds for the acoustically simple feature place of articulation. Brain magnetic correlates indexing the extraction of acoustically more complex features, such as lip rounding (ROUND) in vowels, have not been unraveled yet. The present study uses magnetoencephalography (MEG) to describe the spatial-temporal neural dynamics underlying the extraction of phonological features. We examined the induced electromagnetic brain response to German vowels and found the event-related desynchronization in the upper beta-band to be prolonged for those vowels that exhibit the lip rounding feature (ROUND). It was the presence of that feature rather than circumscribed single acoustic parameters, such as their formant frequencies, which explained the differences between the experimental conditions. We conclude that the prolonged event-related desynchronization in the upper beta-band correlates with the computational effort for the extraction of acoustically complex phonological features from the speech signal. The results provide an additional biomagnetic parameter to study mechanisms of speech perception.

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Section: Discussionsupporting

confidence: 67%

“…Consecutively, we would expect for the present study a more intense ERD when the extraction of acoustically complex features such as round is required as compared to the processing of unrounded speech sounds. A more intense ERD can be reflected in a larger amplitude and/or a longer duration of the ERD [22-24]. …”

Section: Introductionmentioning

confidence: 99%

Perception of acoustically complex phonological features in vowels is reflected in the induced brain-magnetic activity

Eulitz

Obleser

2007

Behav Brain Funct

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“…The N400, a negative wave peaking approximately 400 ms post‐stimulus onset, is an ERP component closely tied to semantic processing (Kutas & Federmeier, ; Kutas & Hillyard, ). All semantic stimuli (auditory, pictorial, orthographic) elicit an N400, whose amplitude is larger when the stimulus violates an expectancy set by a preceding semantic context.…”

Section: Introductionmentioning

confidence: 99%

The organization of words and environmental sounds in the second year: Behavioral and electrophysiological evidence

Hendrickson

Love

Walenski

et al. 2018

Developmental Science

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The majority of research examining early auditory-semantic processing and organization is based on studies of meaningful relations between words and referents. However, a thorough investigation into the fundamental relation between acoustic signals and meaning requires an understanding of how meaning is associated with both lexical and non-lexical sounds. Indeed, it is unknown how meaningful auditory information that is not lexical (e.g., environmental sounds) is processed and organized in the young brain. To capture the structure of semantic organization for words and environmental sounds, we record event-related potentials as 20-month-olds view images of common nouns (e.g., dog) while hearing words or environmental sounds that match the picture (e.g., "dog" or barking), that are within-category violations (e.g., "cat" or meowing), or that are between-category violations (e.g., "pen" or scribbling). Results show both words and environmental sounds exhibit larger negative amplitudes to between-category violations relative to matches. Unlike words, which show a greater negative response early and consistently to within-category violations, such an effect for environmental sounds occurs late in semantic processing. Thus, as in adults, the young brain represents semantic relations between words and between environmental sounds, though it more readily differentiates semantically similar words compared to environmental sounds.

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“…Applications of an FPGA based digital signal processing platform can be found in [32]. As proposed by Lebrun et al in [33], a surrounding stimulus received is highlighted in red, and the issue on an EEG brain map reconstruction had been addressed as well by Sanei and Leyman in [34]. …”

Section: Introductionmentioning

confidence: 99%

Study on a Real-Time BEAM System for Diagnosis Assistance Based on a System on Chips Design

Sung

Chen

Chang

2013

Sensors

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As an innovative as well as an interdisciplinary research project, this study performed an analysis of brain signals so as to establish BrainIC as an auxiliary tool for physician diagnosis. Cognition behavior sciences, embedded technology, system on chips (SOC) design and physiological signal processing are integrated in this work. Moreover, a chip is built for real-time electroencephalography (EEG) processing purposes and a Brain Electrical Activity Mapping (BEAM) system, and a knowledge database is constructed to diagnose psychosis and body challenges in learning various behaviors and signals antithesis by a fuzzy inference engine. This work is completed with a medical support system developed for the mentally disabled or the elderly abled.

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An ERD mapping study of the neurocognitive processes involved in the perceptual and semantic analysis of environmental sounds and words

Cited by 15 publications

References 74 publications

Perception of acoustically complex phonological features in vowels is reflected in the induced brain-magnetic activity

Perception of acoustically complex phonological features in vowels is reflected in the induced brain-magnetic activity

The organization of words and environmental sounds in the second year: Behavioral and electrophysiological evidence

Study on a Real-Time BEAM System for Diagnosis Assistance Based on a System on Chips Design

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