Neuroimaging evidence of visual-vestibular interaction accounting for perceptual mislocalization induced by head rotation

Xin He; Min Bao

doi:10.1117/1.NPh.11.1.015005

31 January 2024 Neuroimaging evidence of visual-vestibular interaction accounting for perceptual mislocalization induced by head rotation

Xin He, Min Bao

Author Affiliations +

Neurophotonics, Vol. 11, Issue 1, 015005 (January 2024). https://doi.org/10.1117/1.NPh.11.1.015005

Abstract

Significance

A fleeting flash aligned vertically with an object remaining stationary in the head-centered space would be perceived as lagging behind the object during the observer’s horizontal head rotation. This perceptual mislocalization is an illusion named head-rotation-induced flash-lag effect (hFLE). While many studies have investigated the neural mechanism of the classical visual FLE, the hFLE has been hardly investigated.

Aim

We measured the cortical activity corresponding to the hFLE on participants experiencing passive head rotations using functional near-infrared spectroscopy.

Approach

Participants were asked to judge the relative position of a flash to a fixed reference while being horizontally rotated or staying static in a swivel chair. Meanwhile, functional near-infrared spectroscopy signals were recorded in temporal-parietal areas. The flash duration was manipulated to provide control conditions.

Results

Brain activity specific to the hFLE was found around the right middle/inferior temporal gyri, and bilateral supramarginal gyri and superior temporal gyri areas. The activation was positively correlated with the rotation velocity of the participant around the supramarginal gyrus and negatively related to the hFLE intensity around the middle temporal gyrus.

Conclusions

These results suggest that the mechanism underlying the hFLE involves multiple aspects of visual-vestibular interactions including the processing of multisensory conflicts mediated by the temporoparietal junction and the modulation of vestibular signals on object position perception in the human middle temporal complex.

CC BY: © The Authors. Published by SPIE under a Creative Commons Attribution 4.0 International License. Distribution or reproduction of this work in whole or in part requires full attribution of the original publication, including its DOI.

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Xin He and Min Bao "Neuroimaging evidence of visual-vestibular interaction accounting for perceptual mislocalization induced by head rotation," Neurophotonics 11(1), 015005 (31 January 2024). https://doi.org/10.1117/1.NPh.11.1.015005

Received: 6 July 2023; Accepted: 8 January 2024; Published: 31 January 2024

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KEYWORDS

Visualization

Neuroimaging

Baryon acoustic oscillations

Brain

Neurophotonics

Signal to noise ratio

Head

Significance

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