RT Journal Article
SR Electronic
T1 Evidence for grid-cell-related activity in the time domain
JF bioRxiv
FD Cold Spring Harbor Laboratory
SP 2022.06.14.476894
DO 10.1101/2022.06.14.476894
A1 Peters-Founshtein, Gregory
A1 Dafni-Merom, Amnon
A1 Monsa, Rotem
A1 Arzy, Shahar
YR 2022
UL http://biorxiv.org/content/early/2022/06/16/2022.06.14.476894.abstract
AB The relation between the processing of space and time in the brain has been an enduring cross-disciplinary question. Grid cells have been recognized as a hallmark of the mammalian navigation system, with recent studies attesting to their involvement in organization of conceptual knowledge in humans. To determine whether grid-cell-like representations support temporal processing, we asked subjects to mentally simulate changes in age and time-of-day, each constituting “trajectory” in an age-day space, while undergoing fMRI. We found that grid-cell-like representations supported trajecting across this age-day space. Furthermore, brain regions concurrently coding past-to-future orientation positively modulated the magnitude of grid-cell-like representation in the left entorhinal cortex. Our findings suggest that temporal processing may be supported by spatially modulated systems, and that innate regularities of abstract domains may interface and alter grid-cell-like representations, similarly to spatial geometry.Competing Interest StatementThe authors have declared no competing interest.