A Potential Role of Auditory Induced Modulations in Primary Visual Cortex

In: Multisensory Research
View More View Less
  • 1 1Department of Physiology of Cognitive Processes, Max Planck Institute for Biological Cybernetics, 72076 Tübingen, Germany
  • | 2 2IMPRS for Cognitive and Systems Neuroscience, Universität Tübingen, 72074 Tübingen, Germany
  • | 3 3Division of Imaging Science and Biomedical Engineering, University of Manchester, Manchester M13 9PT, United Kingdom
  • | 4 4Department of Biomedical Sciences, University of Antwerp, 2610 Wilrijk, Belgium
Download Citation Get Permissions

Access options

Get access to the full article by using one of the access options below.

Institutional Login

Log in with Open Athens, Shibboleth, or your institutional credentials

Login via Institution


Buy instant access (PDF download and unlimited online access):


A biologically relevant event is normally the source of multiple, typically correlated, sensory inputs. To optimize perception of the outer world, our brain combines the independent sensory measurements into a coherent estimate. However, if sensory information is not readily available for every pertinent sense, the brain tries to acquire additional information via covert/overt orienting behaviors or uses internal knowledge to modulate sensory sensitivity based on prior expectations. Cross-modal functional modulation of low-level auditory areas due to visual input has been often described; however, less is known about auditory modulations of primary visual cortex. Here, based on some recent evidence, we propose that an unexpected auditory signal could trigger a reflexive overt orienting response towards its source and concomitantly increase the primary visual cortex sensitivity at the locations where the object is expected to enter the visual field. To this end, we propose that three major functionally specific pathways are employed in parallel. A stream orchestrated by the superior colliculus is responsible for the overt orienting behavior, while direct and indirect (via higher-level areas) projections from A1 to V1 respectively enhance spatiotemporal sensitivity and facilitate object detectability.

Content Metrics

All Time Past Year Past 30 Days
Abstract Views 431 170 8
Full Text Views 131 4 0
PDF Views & Downloads 27 6 0