Visual cortex signals a mismatch between regularity of auditory and visual streams

NeuroImage
Michael AndricUri Hasson

Abstract

Understanding how humans code for and respond to environmental uncertainty/regularity is a question shared by current computational and neurobiological approaches to human cognition. To date, studies investigating neurobiological systems that track input uncertainty have examined responses to uni-sensory streams. It is not known, however, whether there exist brain systems that combine information about the regularity of input streams presented to different senses. We report an fMRI study that aimed to identify brain systems that relate statistical information across sensory modalities. We constructed temporally extended auditory and visual streams, each of which could be random or highly regular, and presented them concurrently. We found strong signatures of "regularity matching" in visual cortex bilaterally; responses were higher when the level of regularity in the auditory and visual streams mismatched than when it matched, [(AudHigh/VisLow and AudLow/VisHigh) >(AudLow/VisLow and AudHigh/VisHigh)]. In addition, several frontal and parietal regions tracked regularity of the auditory or visual stream independently of the other stream's regularity. An individual-differences analysis suggested that signatures of single-modality-f...Continue Reading

References

Jun 1, 1996·Computers and Biomedical Research, an International Journal·R W Cox
Jul 4, 2009·NeuroImage·Douglas N Greve, Bruce Fischl
Feb 5, 2013·NeuroImage·Gang ChenRobert W Cox
Nov 23, 2016·Philosophical Transactions of the Royal Society of London. Series B, Biological Sciences·Uri Hasson

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