Cortical processing for the vestibular and visual input of egomotion in macaque monkeys: Separate networks with targeted convergence.

ABSTRACT: The integration of visual and vestibular inputs during egomotion is fundamental for both postural and navigational control. In the present study, we used functional magnetic resonance imaging (fMRI) in four macaque monkeys to investigate cortical activation in response to galvanic vestibular stimulation (GVS), applied through transmastoid electrodes, and egomotion-compatible (EC) optic flow patterns. Visual and vestibular stimulations activate two largely independent cortical networks: the vestibular network encompasses the insular cortex, superior parietal lobule, frontal lobe, and cingulate cortex, while optic flow primarily activates regions in the superior temporal sulcus, temporo-parietal junction, inferior parietal lobule, and restricted portions of the cingulate and frontal cortices

SUBMITTER: Marchand S 

PROVIDER: S-EPMC12797147 | biostudies-literature | 2026

REPOSITORIES: biostudies-literature