Schedule of Events | Search Abstracts | Symposia | Invited Symposia | Poster Sessions | Data Blitz Sessions

Poster E97

Spatiotemporal dynamics of spontaneous tau-rhythms in human temporal cortex

Poster Session E - Monday, April 15, 2024, 2:30 – 4:30 pm EDT, Sheraton Hall ABC

Natalie Schaworonkow1, Peter Donhauser1, David Poeppel1,2; 1Ernst Strüngmann Institute for Neuroscience, Frankfurt am Main, Germany, 2Department of Psychology, New York University, New York, US

Human electrophysiological activity displays intricate oscillations, with the most prominent rhythmic activity manifesting in the alpha-band (8–13 Hz). While the organization of alpha-band rhythms in occipital and sensorimotor cortex has been extensively studied, this is not the case for tau-rhythms, the rhythms in the alpha-band in the temporal cortex. On the hypothesis that these rhythms are basic building blocks for processing functions that are reused across separate sensory domains, tau-rhythms are important to understand for auditory and speech processing. However, this requires a careful differentiation of tau-rhythms from rhythmic or evoked activity in the theta- and delta-bands and an in-depth description of its spatiotemporal dynamics. Here we investigate dynamics and generators of tau-rhythms using high-resolution invasive electrophysiological data. A large dataset, encompassing both subdural grid as well as stereotactically placed depth electrodes, was analyzed to delineate alpha-rhythm generators. We identified rhythms with independent amplitude in the alpha-band, and mapped them to cortical and subcortical regions. Focusing on tau-rhythms in the temporal cortex, we found several independent oscillatory sources for selected individual participants, with differential spatial spread across the temporal cortex and event-related desynchronization to sound. Next, we explored generative models of these rhythms using leadfield simulations, considering the possibility of traveling waves or separate oscillatory sources. We characterized the human tau-rhythm, identifying several oscillatory sources within temporal cortex. The findings contribute to the understanding of the family of different alpha-band rhythms and provide a necessary foundation for future investigation into the functional significance of tau-rhythms in perceptual processing.

Topic Area: PERCEPTION & ACTION: Audition


CNS Account Login


April 13–16  |  2024