Neural Codes for One's Own Position and Direction in a Real-World "Vista" Environment

Frontiers in Human Neuroscience
Valentina SulpizioGaspare Galati

Abstract

Humans, like animals, rely on an accurate knowledge of one's spatial position and facing direction to keep orientated in the surrounding space. Although previous neuroimaging studies demonstrated that scene-selective regions (the parahippocampal place area or PPA, the occipital place area or OPA and the retrosplenial complex or RSC), and the hippocampus (HC) are implicated in coding position and facing direction within small-(room-sized) and large-scale navigational environments, little is known about how these regions represent these spatial quantities in a large open-field environment. Here, we used functional magnetic resonance imaging (fMRI) in humans to explore the neural codes of these navigationally-relevant information while participants viewed images which varied for position and facing direction within a familiar, real-world circular square. We observed neural adaptation for repeated directions in the HC, even if no navigational task was required. Further, we found that the amount of knowledge of the environment interacts with the PPA selectivity in encoding positions: individuals who needed more time to memorize positions in the square during a preliminary training task showed less neural attenuation in this scene-se...Continue Reading

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Citations

Nov 13, 2019·Human Brain Mapping·Sabrina PitzalisGaspare Galati
Jul 11, 2020·Brain Structure & Function·Valentina SulpizioSabrina Pitzalis
Sep 7, 2019·Neuroscience and Biobehavioral Reviews·Maddalena BocciaCecilia Guariglia

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