Task-dependent neural representations of salient events in dynamic auditory scenes
Selecting pertinent events in the cacophony of sounds that impinge on our ears every day is regulated by the acoustic salience of sounds in the scene as well as their behavioral relevance as dictated by top-down task-dependent demands. The current study aims to explore the neural signature of both f...
| Main Authors: | , |
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| Format: | Article |
| Language: | English |
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Frontiers Media S.A.
2014-07-01
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| Series: | Frontiers in Neuroscience |
| Subjects: | |
| Online Access: | http://journal.frontiersin.org/Journal/10.3389/fnins.2014.00203/full |
| _version_ | 1818566366558420992 |
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| author | Lan eShuai Mounya eElhilali |
| author_facet | Lan eShuai Mounya eElhilali |
| author_sort | Lan eShuai |
| collection | DOAJ |
| description | Selecting pertinent events in the cacophony of sounds that impinge on our ears every day is regulated by the acoustic salience of sounds in the scene as well as their behavioral relevance as dictated by top-down task-dependent demands. The current study aims to explore the neural signature of both facets of attention, as well as their possible interactions in the context of auditory scenes. Using a paradigm with dynamic auditory streams with occasional salient events, we recorded neurophysiological responses of human listeners using EEG while manipulating the subjects’ attentional state as well as the presence or absence of a competing auditory stream. Our results showed that salient events caused an increase in the auditory steady-state response (ASSR) irrespective of attentional state or complexity of the scene. Such increase supplemented ASSR increases due to task-driven attention. Salient events also evoked a strong N1 peak in the ERP response when listeners were attending to the target sound stream, accompanied by an MMN-like component in some cases and changes in the P1 and P300 components under all listening conditions. Overall, bottom-up attention induced by a salient change in the auditory stream appears to mostly modulate the amplitude of the steady-state response and certain event-related potentials to salient sound events; though this modulation is affected by top-down attentional processes and the prominence of these events in the auditory scene as well. |
| first_indexed | 2024-12-14T01:52:48Z |
| format | Article |
| id | doaj.art-6610a329767f430c8c52ef718b6bacd8 |
| institution | Directory Open Access Journal |
| issn | 1662-453X |
| language | English |
| last_indexed | 2024-12-14T01:52:48Z |
| publishDate | 2014-07-01 |
| publisher | Frontiers Media S.A. |
| record_format | Article |
| series | Frontiers in Neuroscience |
| spelling | doaj.art-6610a329767f430c8c52ef718b6bacd82022-12-21T23:21:20ZengFrontiers Media S.A.Frontiers in Neuroscience1662-453X2014-07-01810.3389/fnins.2014.0020383585Task-dependent neural representations of salient events in dynamic auditory scenesLan eShuai0Mounya eElhilali1Johns Hopkins UniversityJohns Hopkins UniversitySelecting pertinent events in the cacophony of sounds that impinge on our ears every day is regulated by the acoustic salience of sounds in the scene as well as their behavioral relevance as dictated by top-down task-dependent demands. The current study aims to explore the neural signature of both facets of attention, as well as their possible interactions in the context of auditory scenes. Using a paradigm with dynamic auditory streams with occasional salient events, we recorded neurophysiological responses of human listeners using EEG while manipulating the subjects’ attentional state as well as the presence or absence of a competing auditory stream. Our results showed that salient events caused an increase in the auditory steady-state response (ASSR) irrespective of attentional state or complexity of the scene. Such increase supplemented ASSR increases due to task-driven attention. Salient events also evoked a strong N1 peak in the ERP response when listeners were attending to the target sound stream, accompanied by an MMN-like component in some cases and changes in the P1 and P300 components under all listening conditions. Overall, bottom-up attention induced by a salient change in the auditory stream appears to mostly modulate the amplitude of the steady-state response and certain event-related potentials to salient sound events; though this modulation is affected by top-down attentional processes and the prominence of these events in the auditory scene as well.http://journal.frontiersin.org/Journal/10.3389/fnins.2014.00203/fullAttentionTop-DownBottom-upauditory sceneStead-state Response |
| spellingShingle | Lan eShuai Mounya eElhilali Task-dependent neural representations of salient events in dynamic auditory scenes Frontiers in Neuroscience Attention Top-Down Bottom-up auditory scene Stead-state Response |
| title | Task-dependent neural representations of salient events in dynamic auditory scenes |
| title_full | Task-dependent neural representations of salient events in dynamic auditory scenes |
| title_fullStr | Task-dependent neural representations of salient events in dynamic auditory scenes |
| title_full_unstemmed | Task-dependent neural representations of salient events in dynamic auditory scenes |
| title_short | Task-dependent neural representations of salient events in dynamic auditory scenes |
| title_sort | task dependent neural representations of salient events in dynamic auditory scenes |
| topic | Attention Top-Down Bottom-up auditory scene Stead-state Response |
| url | http://journal.frontiersin.org/Journal/10.3389/fnins.2014.00203/full |
| work_keys_str_mv | AT laneshuai taskdependentneuralrepresentationsofsalienteventsindynamicauditoryscenes AT mounyaeelhilali taskdependentneuralrepresentationsofsalienteventsindynamicauditoryscenes |