title: A 7T fMRI study investigating the influence of oscillatory phase on syllable representations.
abstract: Stimulus categorization is influenced by oscillations in the brain. For example, we have shown that ongoing oscillatory phase biases identification of an ambiguous syllable that can either be perceived as /da/ or /ga/. This suggests that phase is a cue for the brain to determine syllable identity and this cue could be an element of the representation of these syllables. If so, brain activation patterns for /da/ should be more unique when the syllable is presented at the /da/ biasing (i.e. its "preferred") phase. To test this hypothesis we presented non-ambiguous /da/ and /ga/ syllables at either their preferred or non-preferred phase (using sensory entrainment) while measuring 7T fMRI. Using multivariate pattern analysis in auditory regions we show that syllable decoding performance is higher when syllables are presented at their preferred compared to their non-preferred phase. These results suggest that phase information increases the distinctiveness of /da/ and /ga/ brain activation patterns.
authors.affiliation: Department of Cognitive Neuroscience, Faculty of Psychology and Neuroscience, Maastricht University, Maastricht, The Netherlands. Electronic address: sanne.tenoever@maastrichtuniversity.nl.
authors.forename: S
authors.initials: S
authors.lastname: Ten Oever
authors.affiliation: Department of Cognitive Neuroscience, Faculty of Psychology and Neuroscience, Maastricht University, Maastricht, The Netherlands.
authors.forename: L
authors.initials: L
authors.lastname: Hausfeld
authors.affiliation: Department of Cognitive Neuroscience, Faculty of Psychology and Neuroscience, Maastricht University, Maastricht, The Netherlands.
authors.forename: J M
authors.initials: JM
authors.lastname: Correia
authors.affiliation: Department of Cognitive Neuroscience, Faculty of Psychology and Neuroscience, Maastricht University, Maastricht, The Netherlands; Department of Educational Neuroscience, Faculty of Psychology and Education and Institute Learn, VU University Amsterdam, The Netherlands.
authors.forename: N
authors.initials: N
authors.lastname: Van Atteveldt
authors.affiliation: Department of Cognitive Neuroscience, Faculty of Psychology and Neuroscience, Maastricht University, Maastricht, The Netherlands; Maastricht Center for Systems Biology (MaCSBio), Maastricht University, Maastricht, The Netherlands.
authors.forename: E
authors.initials: E
authors.lastname: Formisano
authors.affiliation: Department of Cognitive Neuroscience, Faculty of Psychology and Neuroscience, Maastricht University, Maastricht, The Netherlands.
authors.forename: A T
authors.initials: AT
authors.lastname: Sack
mesh_terms: D000161:Acoustic Stimulation / Q000379:methods; D000328:Adult; D001303:Auditory Cortex / Q000502:physiology*; D001683:Biological Clocks / Q000502:physiology*; D001931:Brain Mapping / Q000379:methods; D058256:Brain Waves / Q000502:physiology*; D005260:Female; D006801:Humans; D008279:Magnetic Resonance Imaging / Q000379:methods; D008297:Male; D009991:Oscillometry / Q000379:methods; D010700:Phonetics; D021641:Recognition, Psychology / Q000502:physiology*; D013067:Speech Perception / Q000502:physiology*; D013647:Task Performance and Analysis
keywords: Language; Oscillations; Phase; Temporal statistics; fMRI