[Coggroup] McGill Cognitive Area Seminar, Sep 30: The role of auditory and cross-modal entrainment on auditory gap detection performance
Dear all,
This week's Cognitive Area Seminar will be held on Friday (September 30, 3:30 - 5 PM, Room S3/4, Stewart Biology Building, 1205 Dr. Penfield Ave.).
Our speaker is Anna-Katharina Bauer (PhD Candidate, University of Oldenburg, DE). Her talk is titled:
*"The role of auditory and cross-modal entrainment on auditory gap detection performance."*
For a full abstract, see below the dashed line. Please join us at this event!
For our full schedule, please see:
https://www.mcgill.ca/psychology/events-colloquia-0/brownbag-series
--------------------------------------------------------------------------------
*The role of auditory and cross-modal entrainment on auditory gap detection performance *
Anna-Katharina Bauer, PhD Candidate, University of Oldenburg, DE
Many natural auditory stimuli, such as speech and music, are characterized by rhythmic patterns, to which neural oscillations can become synchronized. The neural synchronization to environmental rhythms is called entrainment and is thought to shape human perception by optimizing cortical excitability to be high or low hen critical events are expected. Here, we will present two studies investigating the beneficial effects of unimodal (auditory) and cross-modal (visual to auditory) entrainment on auditory gap detection performance. In a human electroencephalography (EEG) study, we investigated the temporal evolution of neural entrainment to a 3 Hz frequency-modulated (FM) tone and assessed how entrainment modulated sensitivity to small gaps placed in the stimulus sequence. Two stimulus conditions were compared, an early (3.67s, 11 tone cycles) and a late condition (7.67s, 23 tone cycles): The former contained an one second time period prior to gap occurrence, and the latter contained a four second time period, allowing us to study the temporal evolution of entrainment. Gap detection performance and reaction times were modulated by the phase angle of the stimulus. Reaction times were faster for the late condition, suggesting stronger phase entrainment over time. Subsequent analysis of inter-trial phase coherence revealed a single peak in the 3 Hz frequency band. Taken together, these findings suggest that auditory entrainment evolves over time and thereby optimizes perceptual processing. In a multisensory environment our sensory systems are continuously receiving many inputs that are rarely independent from each other and are often interrelated. Indeed, visible events of precede and cause subsequent sounds. Therefore, we ask in a second study whether auditory perception can benefit from cortical phase reorganization introduced by the visual modality. We will propose a new paradigm for studying cross-modal entrainment and present preliminary results of a magnetoencephalographic (MEG) study, showing behavioral benefits of cross-modal compared to unimodal entrainment.
Dear all,
A reminder that today's Cognitive Area Seminar on
"The role of auditory and cross-modal entrainment on auditory gap detection performance" (Anna-Katharina Bauer, PhD Candidate, University of Oldenburg, DE)
is @ 3:30 in Stewart Biology (1205, Dr. Penfield Ave.) in Room S3/4.
Hope to see you there!
On Tue, Sep 27, 2016 at 10:31 AM, Anna Zamm anna.zamm@mail.mcgill.ca wrote:
Dear all,
This week's Cognitive Area Seminar will be held on Friday (September 30, 3:30 - 5 PM, Room S3/4, Stewart Biology Building, 1205 Dr. Penfield Ave.).
Our speaker is Anna-Katharina Bauer (PhD Candidate, University of Oldenburg, DE). Her talk is titled:
*"The role of auditory and cross-modal entrainment on auditory gap detection performance."*
For a full abstract, see below the dashed line. Please join us at this event!
For our full schedule, please see:
https://www.mcgill.ca/psychology/events-colloquia-0/brownbag-series
*The role of auditory and cross-modal entrainment on auditory gap detection performance *
Anna-Katharina Bauer, PhD Candidate, University of Oldenburg, DE
Many natural auditory stimuli, such as speech and music, are characterized by rhythmic patterns, to which neural oscillations can become synchronized. The neural synchronization to environmental rhythms is called entrainment and is thought to shape human perception by optimizing cortical excitability to be high or low hen critical events are expected. Here, we will present two studies investigating the beneficial effects of unimodal (auditory) and cross-modal (visual to auditory) entrainment on auditory gap detection performance. In a human electroencephalography (EEG) study, we investigated the temporal evolution of neural entrainment to a 3 Hz frequency-modulated (FM) tone and assessed how entrainment modulated sensitivity to small gaps placed in the stimulus sequence. Two stimulus conditions were compared, an early (3.67s, 11 tone cycles) and a late condition (7.67s, 23 tone cycles): The former contained an one second time period prior to gap occurrence, and the latter contained a four second time period, allowing us to study the temporal evolution of entrainment. Gap detection performance and reaction times were modulated by the phase angle of the stimulus. Reaction times were faster for the late condition, suggesting stronger phase entrainment over time. Subsequent analysis of inter-trial phase coherence revealed a single peak in the 3 Hz frequency band. Taken together, these findings suggest that auditory entrainment evolves over time and thereby optimizes perceptual processing. In a multisensory environment our sensory systems are continuously receiving many inputs that are rarely independent from each other and are often interrelated. Indeed, visible events of precede and cause subsequent sounds. Therefore, we ask in a second study whether auditory perception can benefit from cortical phase reorganization introduced by the visual modality. We will propose a new paradigm for studying cross-modal entrainment and present preliminary results of a magnetoencephalographic (MEG) study, showing behavioral benefits of cross-modal compared to unimodal entrainment.
-
Anna Zamm