TY  - BOOK
AU  - Varghese, Leonard 
AU  - HariM.Bharadwaj,
AU  - BarbaraG.Shinn-Cunningham
TI  - Evidence against attentional state modulating scalp-recorded auditory brainstem steady-state responses
KW  - Frequency-following response FFR Envelope-following response Attention Auditory processing
N2  - Auditory brainstemresponses(ABRs)andtheirsteady-statecounterpart(subcorticalsteady-state
responses,SSSRs)aregenerallythoughttobeinsensitivetocognitivedemands.However,a
handfulofstudiesreportthatSSSRsaremodulated dependingonthesubject'sfocusofattention,
either towardsorawayfromanauditorystimulus. Here,weexploredwhetherattentionalfocus
affectstheenvelope-followingresponse(EFR),whichisaparticularkindofSSSR,andifso,
whethertheeffectsarespecific towhichsoundelementsinasoundmixtureasubjectisattending
(selectiveauditoryattentionalmodulation),specific toattendedsensoryinput(inter-modal
attentionalmodulation),orinsensitivetoattentional focus.WecomparedthestrengthofEFR-
stimulusphaselockinginhumanlistenersundervarioustasks:listeningtoamonauralstimulus,
selectively attendingtoaparticularearduringdichotic stimuluspresentation,andattendingto
visualstimuliwhileignoringdichoticauditory inputs.Weobservednosystematicchangesinthe
EFR acrossexperimentalmanipulations,eventhoughcorticalEEGrevealedattention-related
modulations ofalphaactivityduringthetask. We concludethatattentionaleffects,ifany,on
humansubcorticalrepresentation ofsoundscannotbeobservedrobustlyusingEFRs
UR  - http://dspace.nal.gov.au/xmlui/bitstream/handle/123456789/283/Evidence%20against%20attentional%20state%20modulating%20scalp%20recorded%20auditory%20brainstem.pdf?sequence=1&isAllowed=y
ER  -