Temporal synchrony effects of optic flow and vestibular inputs on multisensory heading perception
| Autor: | Yong Gu, Qihao Zheng, Luxin Zhou |
|---|---|
| Rok vydání: | 2020 |
| Předmět: |
Male
Heading (navigation) Offset (computer science) Visual perception QH301-705.5 Computer science media_common.quotation_subject Motion Perception Sensory system Optic Flow decision making General Biochemistry Genetics and Molecular Biology Acceleration Perception Parietal Lobe Animals Computer vision Biology (General) Postural Balance media_common self-motion Vestibular system vestibular business.industry multisensory integration Multisensory integration Brain Macaca mulatta heading perception Ear Inner Visual Perception sense organs Artificial intelligence Vestibule Labyrinth Cues business Photic Stimulation |
| Zdroj: | Cell Reports, Vol 37, Iss 7, Pp 109999-(2021) |
| ISSN: | 2211-1247 |
| Popis: | Summary Precise heading perception requires integration of optic flow and vestibular cues, yet the two cues often carry distinct temporal dynamics that may confound cue integration benefit. Here, we varied temporal offset between the two sensory inputs while macaques discriminated headings around straight ahead. We find the best heading performance does not occur under natural condition of synchronous inputs with zero offset but rather when visual stimuli are artificially adjusted to lead vestibular by a few hundreds of milliseconds. This amount exactly matches the lag between the vestibular acceleration and visual speed signals as measured from single-unit-activity in frontal and posterior parietal cortices. Manually aligning cues in these areas best facilitates integration with some nonlinear gain modulation effects. These findings are consistent with predictions from a model by which the brain integrates optic flow speed with a faster vestibular acceleration signal for sensing instantaneous heading direction during self-motion in the environment. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
|