Dr Christian Keitel | Physiological influences on brain state changes and their consequences for subjective perception and performance
Language Circle
- Datum: 05.04.2023
- Uhrzeit: 13:00 - 14:00
- Vortragende(r): Dr Christian Keitel
- University of Stirling & University of Dundee, Scotland, UK
- Ort: MPI für Kognitions- und Neurowissenschaften
- Raum: Wilhelm Wundt Room (A400) + Zoom Meeting (hybrid mode)
- Gastgeber: Max Planck Research Group Language Cycles
Please join via zoom using this link: https://zoom.us/j/95065830000
Changes in brain state over time impact our perception and may influence performance. I will
present some findings that show that cortical state influences perception beyond the stimulus
detected-vs-not-detected dichotomy, and characterise the fluctuations themselves more
closely in the process. I will also tell you why we may want to consider them more rigorously
in our data analysis using the example of pre-stimulus alpha oscillations. Drawing on another
set of recent results, I will review arousal-linked neuromodulation as one likely source of
cortical state fluctuations. Against a previously held notion of arousal as a global influence on
cortical state, our analysis of simultaneous pupil and MEG recordings show diverse
neuromodulatory influences that differ depending on the targeted cortical region, can express
in brain oscillations of different frequency bands or as broadband effects, and vary in their
timing. Finally, I will show recent results that tie arousal fluctuations to another physiological
rhythm. Taken together, these findings give a better understanding of how, when and where
brain state changes manifest, what their perceptual consequences are and where some of
them may originate. Poster