Auditory facilitation of visual-target detection persists regardless of retinal eccentricity and despite wide audiovisual misalignments

The Cognitive Neurophysiology Laboratory, Children's Evaluation and Rehabilitation Center, Department of Pediatrics, Albert Einstein College of Medicine, Van Etten Building, 1C, 1225 Morris Park Avenue, Bronx, NY 10461, USA.
Experimental Brain Research (Impact Factor: 2.04). 04/2011; 213(2-3):167-74. DOI: 10.1007/s00221-011-2670-7
Source: PubMed


It is well established that sounds can enhance visual-target detection, but the mechanisms that govern these cross-sensory effects, as well as the neural pathways involved, are largely unknown. Here, we tested behavioral predictions stemming from the neurophysiologic and neuroanatomic literature. Participants detected near-threshold visual targets presented either at central fixation or peripheral to central fixation that were sometimes paired with sounds that originated from widely misaligned locations (up to 104° from the visual target). Our results demonstrate that co-occurring sounds improve the likelihood of visual-target detection (1) regardless of retinal eccentricity and (2) despite wide audiovisual misalignments. With regard to the first point, these findings suggest that auditory facilitation of visual-target detection is unlikely to operate through previously described corticocortical pathways from auditory cortex that predominantly terminate in regions of visual cortex that process peripheral visual space. With regard to the second point, auditory facilitation of visual-target detection seems to operate through a spatially non-specific modulation of visual processing.

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    • "al for processing such natural stimuli by enhancing and resetting low - frequency ( delta and theta - band ) spontaneous oscillations ( Schroeder and Lakatos , 2009 ) . There is also evidence from human research that a phase - resetting mechanism operating in a rhythmic context can increase processing efficiency ; resulting in enhanced detection ( Fiebelkorn et al . , 2011 ; Ten Oever et al. , 2014 ) and neuronal responses ( Thorne et al . , 2011 ; Romei et al . , 2012 ; see discussion in Lakatos et al . , 2013b ) . For example , Thorne et al . ( 2011 ) showed that phase - reset elicited by a visual stimulus increased the probability of auditory target detection when a subsequent auditory input arrived wi"
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