TY - JOUR T1 - An evolutionary conserved division-of-labor between hippocampal and neocortical sharp-wave ripples organizes information transfer during sleep JF - bioRxiv DO - 10.1101/2022.10.19.512822 SP - 2022.10.19.512822 AU - Frank J. van Schalkwijk AU - Jan Weber AU - Michael A. Hahn AU - Janna D. Lendner AU - Marion Inostroza AU - Jack J. Lin AU - Randolph F. Helfrich Y1 - 2022/01/01 UR - http://biorxiv.org/content/early/2022/10/21/2022.10.19.512822.abstract N2 - The hippocampal sharp-wave ripple (SW-R) is the key substrate of the hippocampal-neocortical dialogue underlying memory formation. Recently, it became evident that SW-R are not unique to archicortex, but constitute a wide-spread neocortical phenomenon. To date, little is known about morphological and functional similarities between archi- and neocortical SW-R. Leveraging intracranial recordings from the human hippocampus and prefrontal cortex during sleep, our results reveal region-specific functional specializations, albeit a near-uniform morphology. While hippocampal SW-R trigger directional hippocampal-to-neocortical information flow, neocortical SW-R reduce information flow to minimize interference. At the population level, hippocampal SW-R confined population dynamics to a low-dimensional subspace, while neocortical SW-R diversified the population response; functionally uncoupling the hippocampal-neocortical network. Critically, our replication in rodents demonstrated the same division-of-labor between archi-and neocortical SW-R. These results uncover an evolutionary preserved mechanism where coordinated interplay between hippocampal and neocortical SW-R temporally segregates hippocampal information transfer from neocortical processing.Competing Interest StatementThe authors have declared no competing interest. ER -