Primacy of vision shapes behavioral strategies and neural substrates of spatial navigation in marmoset hippocampus

Diego B. Piza, Benjamin W. Corrigan, Roberto A. Gulli, Sonia Carmo, A. Claudio Cuello, Lyle Muller and Julio Martinez-Trujillo ()
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Diego B. Piza: Western University
Benjamin W. Corrigan: Western University
Roberto A. Gulli: Columbia University
Sonia Carmo: McGill University
A. Claudio Cuello: McGill University
Lyle Muller: Western University
Julio Martinez-Trujillo: Western University

Nature Communications, 2024, vol. 15, issue 1, 1-21

Abstract: Abstract The role of the hippocampus in spatial navigation has been primarily studied in nocturnal mammals, such as rats, that lack many adaptations for daylight vision. Here we demonstrate that during 3D navigation, the common marmoset, a new world primate adapted to daylight, predominantly uses rapid head-gaze shifts for visual exploration while remaining stationary. During active locomotion marmosets stabilize the head, in contrast to rats that use low-velocity head movements to scan the environment as they locomote. Pyramidal neurons in the marmoset hippocampus CA3/CA1 regions predominantly show mixed selectivity for 3D spatial view, head direction, and place. Exclusive place selectivity is scarce. Inhibitory interneurons are predominantly mixed selective for angular head velocity and translation speed. Finally, we found theta phase resetting of local field potential oscillations triggered by head-gaze shifts. Our findings indicate that marmosets adapted to their daylight ecological niche by modifying exploration/navigation strategies and their corresponding hippocampal specializations.

Date: 2024
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DOI: 10.1038/s41467-024-48374-2

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