Cited by 144Multisensory perception and integrationVisual perception and processing mechanismsNeuroscience and Music Perception

Visuo-auditory interactions in the primary visual cortex of the behaving monkey: Electrophysiological evidence

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Wang, Ye, Celebrini, Simona, Trotter, Yves, Barone, Pascal·2008·BMC Neuroscience

Abstract

BACKGROUND: Visual, tactile and auditory information is processed from the periphery to the cortical level through separate channels that target primary sensory cortices, from which it is further distributed to functionally specialized areas. Multisensory integration is classically assigned to higher hierarchical cortical areas, but there is growing electrophysiological evidence in man and monkey of multimodal interactions in areas thought to be unimodal, interactions that can occur at very short latencies. Such fast timing of multisensory interactions rules out the possibility of an origin in the polymodal areas mediated through back projections, but is rather in favor of heteromodal connections such as the direct projections observed in the monkey, from auditory areas (including the primary auditory cortex AI) directly to the primary visual cortex V1. Based on the existence of such AI to V1 projections, we looked for modulation of neuronal visual responses in V1 by an auditory stimulus in the awake behaving monkey. RESULTS: Behavioral or electrophysiological data were obtained from two behaving monkeys. One monkey was trained to maintain a passive central fixation while a peripheral visual (V) or visuo-auditory (AV) stimulus was presented. From a population of 45 V1 neurons, there was no difference in the mean latencies or strength of visual responses when comparing V and AV conditions. In a second active task, the monkey was required to orient his gaze toward the visual or visuo-auditory stimulus. From a population of 49 cells recorded during this saccadic task, we observed a significant reduction in response latencies in the visuo-auditory condition compared to the visual condition (mean 61.0 vs. 64.5 ms) only when the visual stimulus was at midlevel contrast. No effect was observed at high contrast. CONCLUSION: Our data show that single neurons from a primary sensory cortex such as V1 can integrate sensory information of a different modality, a result that argues against a strict hierarchical model of multisensory integration. Multisensory interaction in V1 is, in our experiment, expressed by a significant reduction in visual response latencies specifically in suboptimal conditions and depending on the task demand. This suggests that neuronal mechanisms of multisensory integration are specific and adapted to the perceptual features of behavior.

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  • There are numerous examples of causative interaction between weakly connected areas where the direct cortico-cortical pathway may play a functional role.

    “There are numerous examples of causative interaction between weakly connected areas where the direct cortico-cortical pathway may play a functional role (Ekstrom et al. 2008; Wang et al. 2008).”

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Authors
Wang, Y., Celebrini, S., Trotter, Y., & Barone, P.
Affiliations
Centre National de la Recherche Scientifique (FR)
Corresponding author
Barone, Pascal
Venue
BMC Neuroscience
Published
2008-08-12
Volume
9
Issue
1
Pages
79-79
ISSN
1471-2202 (ISSN-L)
OpenAlex
W2167082981
Cited by
144
References
132
Citations by year
2026: 3 · 2025: 4 · 2024: 6 · 2023: 3 · 2022: 4 · 2021: 11 · 2020: 9 · 2019: 4 · 2018: 10 · 2017: 7 · 2016: 2 · 2015: 5 · 2014: 10 · 2013: 9 · 2012: 9
FWCI
21.77
Type
journal article
Language
en
Open access
Licence
cc-by
Locations
  • BMC Neuroscience (publishedVersion, cc-by)
  • PubMed Central (publishedVersion, cc-by)
  • PubMed (publishedVersion)
  • HAL (submittedVersion, other-oa)
  • DOAJ (DOAJ: Directory of Open Access Journals) (submittedVersion, cc-by-sa)
Funders
Centre National de la Recherche Scientifique
Topics
  • Social Sciences › Psychology › Experimental and Cognitive Psychology › Multisensory perception and integration
  • Life Sciences › Neuroscience › Cognitive Neuroscience › Visual perception and processing mechanisms
  • Life Sciences › Neuroscience › Cognitive Neuroscience › Neuroscience and Music Perception
Keywords
multisensory integration, primary visual cortex, primary auditory cortex, response latency, saccade task, contrast dependence, behaving monkeys
MeSH terms
Acoustic Stimulation, Animals, Haplorhini, Auditory Cortex, Evoked Potentials, Auditory, Evoked Potentials, Visual, Macaca mulatta, Photic Stimulation, Psychomotor Performance, Reaction Time, Visual Cortex

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