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Journal Article

Auditory white noise exposure results in intrinsic cortical excitability changes


Schuler,  Anna-Lisa       
Scientific Institute for Research, Hospitalization and Health Care (IRCCS), Hospital San Camillo, Venice, Italy;
Lise Meitner Research Group Cognition and Plasticity, MPI for Human Cognitive and Brain Sciences, Max Planck Society;

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Schuler, A.-L., Brkić, D., Ferrazzi, G., Arcara, G., Marinazzo, D., & Pellegrino, G. (2023). Auditory white noise exposure results in intrinsic cortical excitability changes. iScience, 26(8): 107387. doi:10.1016/j.isci.2023.107387.

Cite as: https://hdl.handle.net/21.11116/0000-000D-A06B-6
Cortical excitability is commonly measured by applying magnetic stimulation in combination with measuring behavioral response. This measure has, however, some shortcomings including spatial limitation to the primary motor cortex and not accounting for intrinsic excitability fluctuations. Here, we use a measure for intrinsic excitability based on phase synchronization previously validated for epilepsy. We apply this measure in 30 healthy participants' magnetoencephalography (MEG) recordings during the exposure of auditory white noise, a stimulus that has been suggested to modify cortical excitability. Using cortical parcellation of the MEG source data, we could find a specific pattern of increased and decreased excitability while participants are exposed to white noise vs. silence. Specifically, excitability during white noise exposure decreases in the frontal lobe and increases in the temporal lobe. This study thus adds to the understanding of cortical excitability changes due to specific environmental stimuli as well as the spatial extent of these effects.