Hearing loss impacts neural alpha oscillations under adverse listening conditions
Degradations in external, acoustic stimulation have long been suspected to increase the load on working memory. One neural signature of working memory load is enhanced power of alpha oscillations (6 ‒ 12 Hz). However, it is unknown to what extent common internal, auditory degradation, that is, heari...
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doaj-534d5f9eaddf4a6eb40eca389d728b972020-11-24T23:38:34ZengFrontiers Media S.A.Frontiers in Psychology1664-10782015-02-01610.3389/fpsyg.2015.00177120014Hearing loss impacts neural alpha oscillations under adverse listening conditionsEline Borch Petersen0Eline Borch Petersen1Eline Borch Petersen2Malte eWöstmann3Malte eWöstmann4Jonas eObleser5Stefan eStenfelt6Stefan eStenfelt7Thomas eLunner8Thomas eLunner9Eriksholm Research CentreLinköping UniversityLinnaeus Centre HEAD, Swedish Institute for Disability ResearchMax Planck Institute for Human Cognitive and Brain SciencesInternational Max Planck Research School on Neuroscience of CommunicationMax Planck Institute for Human Cognitive and Brain SciencesLinköping UniversityLinnaeus Centre HEAD, Swedish Institute for Disability ResearchEriksholm Research CentreLinnaeus Centre HEAD, Swedish Institute for Disability ResearchDegradations in external, acoustic stimulation have long been suspected to increase the load on working memory. One neural signature of working memory load is enhanced power of alpha oscillations (6 ‒ 12 Hz). However, it is unknown to what extent common internal, auditory degradation, that is, hearing impairment, affects the neural mechanisms of working memory when audibility has been ensured via amplification. Using an adapted auditory Sternberg paradigm, we varied the orthogonal factors memory load and background noise level, while the electroencephalogram (EEG) was recorded. In each trial, participants were presented with 2, 4, or 6 spoken digits embedded in one of three different levels of background noise. After a stimulus-free delay interval, participants indicated whether a probe digit had appeared in the sequence of digits. Participants were healthy older adults (62 – 86 years), with normal to moderately impaired hearing. Importantly, the background noise levels were individually adjusted and participants were wearing hearing aids to equalize audibility across participants. Irrespective of hearing loss, behavioral performance improved with lower memory load and also with lower levels of background noise. Interestingly, the alpha power in the stimulus-free delay interval was dependent on the interplay between task demands (memory load and noise level) and hearing loss; while alpha power increased with hearing loss during low and intermediate levels of memory load and background noise, it dropped for participants with the relatively most severe hearing loss under the highest memory load and background noise level. These findings suggest that adaptive neural mechanisms for coping with adverse listening conditions break down for higher degrees of hearing loss, even when adequate hearing aid amplification is in place.http://journal.frontiersin.org/Journal/10.3389/fpsyg.2015.00177/fullCognitionHearing Losshearing aidworking memoryAlpha oscillations |
collection |
DOAJ |
language |
English |
format |
Article |
sources |
DOAJ |
author |
Eline Borch Petersen Eline Borch Petersen Eline Borch Petersen Malte eWöstmann Malte eWöstmann Jonas eObleser Stefan eStenfelt Stefan eStenfelt Thomas eLunner Thomas eLunner |
spellingShingle |
Eline Borch Petersen Eline Borch Petersen Eline Borch Petersen Malte eWöstmann Malte eWöstmann Jonas eObleser Stefan eStenfelt Stefan eStenfelt Thomas eLunner Thomas eLunner Hearing loss impacts neural alpha oscillations under adverse listening conditions Frontiers in Psychology Cognition Hearing Loss hearing aid working memory Alpha oscillations |
author_facet |
Eline Borch Petersen Eline Borch Petersen Eline Borch Petersen Malte eWöstmann Malte eWöstmann Jonas eObleser Stefan eStenfelt Stefan eStenfelt Thomas eLunner Thomas eLunner |
author_sort |
Eline Borch Petersen |
title |
Hearing loss impacts neural alpha oscillations under adverse listening conditions |
title_short |
Hearing loss impacts neural alpha oscillations under adverse listening conditions |
title_full |
Hearing loss impacts neural alpha oscillations under adverse listening conditions |
title_fullStr |
Hearing loss impacts neural alpha oscillations under adverse listening conditions |
title_full_unstemmed |
Hearing loss impacts neural alpha oscillations under adverse listening conditions |
title_sort |
hearing loss impacts neural alpha oscillations under adverse listening conditions |
publisher |
Frontiers Media S.A. |
series |
Frontiers in Psychology |
issn |
1664-1078 |
publishDate |
2015-02-01 |
description |
Degradations in external, acoustic stimulation have long been suspected to increase the load on working memory. One neural signature of working memory load is enhanced power of alpha oscillations (6 ‒ 12 Hz). However, it is unknown to what extent common internal, auditory degradation, that is, hearing impairment, affects the neural mechanisms of working memory when audibility has been ensured via amplification. Using an adapted auditory Sternberg paradigm, we varied the orthogonal factors memory load and background noise level, while the electroencephalogram (EEG) was recorded. In each trial, participants were presented with 2, 4, or 6 spoken digits embedded in one of three different levels of background noise. After a stimulus-free delay interval, participants indicated whether a probe digit had appeared in the sequence of digits. Participants were healthy older adults (62 – 86 years), with normal to moderately impaired hearing. Importantly, the background noise levels were individually adjusted and participants were wearing hearing aids to equalize audibility across participants. Irrespective of hearing loss, behavioral performance improved with lower memory load and also with lower levels of background noise. Interestingly, the alpha power in the stimulus-free delay interval was dependent on the interplay between task demands (memory load and noise level) and hearing loss; while alpha power increased with hearing loss during low and intermediate levels of memory load and background noise, it dropped for participants with the relatively most severe hearing loss under the highest memory load and background noise level. These findings suggest that adaptive neural mechanisms for coping with adverse listening conditions break down for higher degrees of hearing loss, even when adequate hearing aid amplification is in place. |
topic |
Cognition Hearing Loss hearing aid working memory Alpha oscillations |
url |
http://journal.frontiersin.org/Journal/10.3389/fpsyg.2015.00177/full |
work_keys_str_mv |
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