Visual and Vestibular Selectivity for Self-Motion in Macaque Posterior Parietal Area 7a.

ABSTRACT: We examined the responses of neurons in posterior parietal area 7a to passive rotational and translational self-motion stimuli, while systematically varying the speed of visually simulated (optic flow cues) or actual (vestibular cues) self-motion. Contrary to a general belief that responses in area 7a are predominantly visual, we found evidence for a vestibular dominance in self-motion processing. Only a small fraction of neurons showed multisensory convergence of visual/vestibular and linear/angular self-motion cues. These findings suggest possibly independent neuronal population codes for visual versus vestibular and linear versus angular self-motion. Neural responses scaled with self-motion magnitude (i.e., speed) but temporal dynamics were diverse across the population. Analyses of lam

SUBMITTER: Avila E 

PROVIDER: S-EPMC6886513 | biostudies-literature | 2019 Aug

REPOSITORIES: biostudies-literature