Cochlear activity during silent periods shows a theta rhythmic pattern and is correlated to classical intermodal attention alpha effects

Publikation: KonferenzbeitragPoster

Abstract

It is well established that the auditory efferent network can influence cochlear processes via direct and mediated projections from the auditory cortex to the superior olivary complex (SOC). Though, there is an ongoing controversy where in the processing hierarchy of this network attention processes take effect. So far all studies showing attentional modulations of cochlear responses have been limited to sound evoked responses (e. g. Wittekindt et al. 2014).
The present study uses a trial-wise cueing paradigm to investigate audiovisual selective attention in humans simultaneously at the cortical and cochlear level during a stimulus-free cue-target period.
First, it was found that cochlear activity in silent cue-target periods was for both auditory and visual selective attention intrinsically modulated by a theta-rhythmic pattern (~4 Hz). Second, during periods of auditory selective attention slow modulations of cochlear activity were enhanced. Functional brain data revealed that posterior alpha and beta activity was enhanced during auditory selective attention. Interestingly, the found cochlear and ‘classical’ cortical posterior alpha attention effects showed a significant negative correlation.
It is hinted that the attentional sampling of the cochlea is putatively driven by a theta rhythm. Eventually, the correlation between cochlear and cortical attention effects suggests that participants showing the ‘classical’ posterior alpha modulations to a lesser extent appear to engage more strongly the efferent auditory system.
OriginalspracheEnglisch
PublikationsstatusVeröffentlicht - 21 Okt 2019
Veranstaltung49th Annual Meeting of the Society for Neuroscience (SfN) - McCormick Place, Chicago, USA/Vereinigte Staaten
Dauer: 19 Okt 201923 Okt 2019

Konferenz

Konferenz49th Annual Meeting of the Society for Neuroscience (SfN)
KurztitelNeuroscience 2019
LandUSA/Vereinigte Staaten
OrtChicago
Zeitraum19/10/1923/10/19

Systematik der Wissenschaftszweige 2012

  • 501 Psychologie

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