: Grid-cells firing fields tile the environment with a 6-fold periodicity during both locomotion and visual exploration. Here, we tested, in humans, whether movements of covert attention elicit grid-like coding using frequency tagging. Participants observed visual trajectories presented sequentially at fixed rate, allowing different spatial periodicities (e.g., 4-, 6-, and 8-fold) to have corresponding temporal periodicities (e.g., 1, 1.5, and 2 Hz), thus resulting in distinct spectral responses. We found a higher response for the (grid-like) 6-fold periodicity and localized this effect in medial-temporal sources. In a control experiment featuring the same temporal periodicity but lacking spatial structure, the 6-fold effect did not emerge, suggesting its dependency on spatial movements of attention. We report evidence that grid-like signals in the human medial-temporal lobe can be elicited by covert attentional movements and suggest that attentional coding may provide a suitable mechanism to support the activation of cognitive maps during conceptual navigation.

MEG frequency tagging reveals a grid-like code during attentional movements / Giari, Giuliano; Vignali, Lorenzo; Xu, Yangwen; Bottini, Roberto. - In: CELL REPORTS. - ISSN 2211-1247. - 42:10(2023), p. 113209. [10.1016/j.celrep.2023.113209]

MEG frequency tagging reveals a grid-like code during attentional movements

Giari, Giuliano
;
Vignali, Lorenzo;Xu, Yangwen;Bottini, Roberto
2023-01-01

Abstract

: Grid-cells firing fields tile the environment with a 6-fold periodicity during both locomotion and visual exploration. Here, we tested, in humans, whether movements of covert attention elicit grid-like coding using frequency tagging. Participants observed visual trajectories presented sequentially at fixed rate, allowing different spatial periodicities (e.g., 4-, 6-, and 8-fold) to have corresponding temporal periodicities (e.g., 1, 1.5, and 2 Hz), thus resulting in distinct spectral responses. We found a higher response for the (grid-like) 6-fold periodicity and localized this effect in medial-temporal sources. In a control experiment featuring the same temporal periodicity but lacking spatial structure, the 6-fold effect did not emerge, suggesting its dependency on spatial movements of attention. We report evidence that grid-like signals in the human medial-temporal lobe can be elicited by covert attentional movements and suggest that attentional coding may provide a suitable mechanism to support the activation of cognitive maps during conceptual navigation.
2023
10
Giari, Giuliano; Vignali, Lorenzo; Xu, Yangwen; Bottini, Roberto
MEG frequency tagging reveals a grid-like code during attentional movements / Giari, Giuliano; Vignali, Lorenzo; Xu, Yangwen; Bottini, Roberto. - In: CELL REPORTS. - ISSN 2211-1247. - 42:10(2023), p. 113209. [10.1016/j.celrep.2023.113209]
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11572/393590
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