Show simple item record

dc.contributor.authorKeshavarzi, Mahmoud
dc.contributor.authorKegler, Mikolaj
dc.contributor.authorKadir, Shabnam
dc.contributor.authorReichenbach, Tobias
dc.date.accessioned2020-02-11T01:15:16Z
dc.date.available2020-02-11T01:15:16Z
dc.date.issued2020-04-15
dc.identifier.citationKeshavarzi , M , Kegler , M , Kadir , S & Reichenbach , T 2020 , ' Transcranial alternating current stimulation in the theta band but not in the delta band modulates the comprehension of naturalistic speech in noise ' , Neuroimage , vol. 210 , 116557 . https://doi.org/10.1016/j.neuroimage.2020.116557
dc.identifier.issn1053-8119
dc.identifier.otherPURE: 19084532
dc.identifier.otherPURE UUID: 24619ebe-d3bf-4893-a1b8-046f1b9df12a
dc.identifier.otherScopus: 85078218368
dc.identifier.otherORCID: /0000-0002-0103-9156/work/68990723
dc.identifier.urihttp://hdl.handle.net/2299/22172
dc.description© 2020 Published by Elsevier Inc. This is an open access article under the CC BY-NC-ND license (http://creativecommons.org/licenses/by-nc-nd/4.0/).
dc.description.abstractAuditory cortical activity entrains to speech rhythms and has been proposed as a mechanism for online speech processing. In particular, neural activity in the theta frequency band (4–8 ​Hz) tracks the onset of syllables which may aid the parsing of a speech stream. Similarly, cortical activity in the delta band (1–4 ​Hz) entrains to the onset of words in natural speech and has been found to encode both syntactic as well as semantic information. Such neural entrainment to speech rhythms is not merely an epiphenomenon of other neural processes, but plays a functional role in speech processing: modulating the neural entrainment through transcranial alternating current stimulation influences the speech-related neural activity and modulates the comprehension of degraded speech. However, the distinct functional contributions of the delta- and of the theta-band entrainment to the modulation of speech comprehension have not yet been investigated. Here we use transcranial alternating current stimulation with waveforms derived from the speech envelope and filtered in the delta and theta frequency bands to alter cortical entrainment in both bands separately. We find that transcranial alternating current stimulation in the theta band but not in the delta band impacts speech comprehension. Moreover, we find that transcranial alternating current stimulation with the theta-band portion of the speech envelope can improve speech-in-noise comprehension beyond sham stimulation. Our results show a distinct contribution of the theta- but not of the delta-band stimulation to the modulation of speech comprehension. In addition, our findings open up a potential avenue of enhancing the comprehension of speech in noise.en
dc.language.isoeng
dc.relation.ispartofNeuroimage
dc.subjectDelta and theta frequency bands
dc.subjectNeural entrainment
dc.subjectNormal hearing
dc.subjectSpeech comprehension
dc.subjectSpeech envelope
dc.subjectSpeech-shaped-noise
dc.subjectTranscranial alternating current stimulation
dc.subjectNeurology
dc.subjectCognitive Neuroscience
dc.titleTranscranial alternating current stimulation in the theta band but not in the delta band modulates the comprehension of naturalistic speech in noiseen
dc.contributor.institutionCentre of Data Innovation Research
dc.contributor.institutionSchool of Physics, Engineering & Computer Science
dc.contributor.institutionDepartment of Computer Science
dc.description.statusPeer reviewed
dc.identifier.urlhttp://www.scopus.com/inward/record.url?scp=85078218368&partnerID=8YFLogxK
rioxxterms.versionVoR
rioxxterms.versionofrecordhttps://doi.org/10.1016/j.neuroimage.2020.116557
rioxxterms.typeJournal Article/Review
herts.preservation.rarelyaccessedtrue


Files in this item

Thumbnail

This item appears in the following Collection(s)

Show simple item record