Cortical high frequency oscillations reflect encoding and retrieval of specific word concepts
- 1Gdansk University of Technology
Abstract
High gamma and ripple frequency oscillations are engaged in encoding and recall of memory traces. Tracking specific traces with their signature neural activities across time and various tasks remains a major challenge. Using intracranial electrode recordings from epilepsy patients, we detected bursts of high-frequency oscillations in response to viewing and remembering the same common nouns in two different tasks repeated on subsequent days. We found the lowest word response selectivity of approximately 40% in the visual sensory areas and increasingly higher selectivity in the more anterior associational regions. The same word sets identified as preferred in a screening task triggered selective responses in another task during visual presentation or free recall with no sensory stimulation in the same session, and on the following day. We demonstrate that persistent reactivation of large-scale neuronal assemblies underlying particular concepts is reflected in bursts of high-frequency oscillations in the human cortex.
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BibTeX
@misc{cimbalnik2026cortical,
title = {{Cortical high frequency oscillations reflect encoding and retrieval of specific word concepts}},
author = {J. Cimbalnik and S. Prathapagiri and L. F. Sarmiento-Rivera and L. Jurkovicova and M. Kojan and P. Daniel and R. Roman and A. Czyzewski and M. Brazdil and M. T. Kucewicz},
howpublished = {bioRxiv},
year = {2026},
month = sep,
doi = {10.64898/2026.09.11.750906},
url = {https://www.biorxiv.org/content/10.64898/2026.09.11.750906v1},
note = {CC BY},
}
RIS
TY - UNPB
TI - Cortical high frequency oscillations reflect encoding and retrieval of specific word concepts
AU - J. Cimbalnik
AU - S. Prathapagiri
AU - L. F. Sarmiento-Rivera
AU - L. Jurkovicova
AU - M. Kojan
AU - P. Daniel
AU - R. Roman
AU - A. Czyzewski
AU - M. Brazdil
AU - M. T. Kucewicz
PY - 2026
DA - 2026/09/11
PB - bioRxiv
DO - 10.64898/2026.09.11.750906
UR - https://www.biorxiv.org/content/10.64898/2026.09.11.750906v1
AB - High gamma and ripple frequency oscillations are engaged in encoding and recall of memory traces. Tracking specific traces with their signature neural activities across time and various tasks remains a major challenge. Using intracranial electrode recordings from epilepsy patients, we detected bursts of high-frequency oscillations in response to viewing and remembering the same common nouns in two different tasks repeated on subsequent days. We found the lowest word response selectivity of approximately 40% in the visual sensory areas and increasingly higher selectivity in the more anterior associational regions. The same word sets identified as preferred in a screening task triggered selective responses in another task during visual presentation or free recall with no sensory stimulation in the same session, and on the following day. We demonstrate that persistent reactivation of large-scale neuronal assemblies underlying particular concepts is reflected in bursts of high-frequency oscillations in the human cortex.
ER -