Brief period of monocular deprivation drives changes in audiovisual temporal perception

Opoku-Baah, Collins; Wallace, Mark T.

doi:10.1167/jov.20.8.8

Cited by 5 publications

(8 citation statements)

References 78 publications

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“…Noticeably, the visual MD effect emerged here for the Deprived eye, while the audio-visual MD effect emerged only for the Undeprived eye. While these effects are in line with previous behavioral studies (Lo Verde et al, 2017; Opoku-Baah and Wallace, 2020), they also support a crucial role of MD in inducing flexible alterations of interocular excitability balance and, in turn, in audio-visual processes. Moreover, although an interaction between MD and eye dominance cannot be excluded, a recent study reported that the MD effect was the same regardless of whether the dominant or the non-dominant eye was deprived (Schwenk et al, 2020).…”

Section: Discussionsupporting

confidence: 90%

“…Previous behavioral studies have shown that multisensory perception can be altered by MD (Lo Verde et al, 2017;Opoku-Baah and Wallace, 2020). By measuring changes in neural oscillations, we assessed neural mechanisms underpinning multisensory short-term plasticity and revealed the specific enhancement of induced gamma activity [65][66][67][68][69][70][71][72][73][74][75] selectively for the Undeprived eye when processing audio-visual input.…”

Section: The Impact Of MD On Audio-visual Processingmentioning

confidence: 99%

“…Alterations induced by MD seem to impact beyond visual processing. At the behavioral level, short-term MD was found to affect the interplay between sensory modalities (Lo Verde et al, 2017; Opoku-Baah and Wallace, 2020). Overall, results were consistent with a decreased multisensory interplay for the deprived eye, in which the visual processing is generally strengthened following MD, and vice versa, an increased multisensory interplay for the undeprived eye, in which visual processing is typically weakened following MD.…”

Section: Introductionmentioning

confidence: 99%

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Short-term monocular deprivation boosts neural responsiveness to audio-visual events for the undeprived eye

Federici

Bernardi

Senna³

et al. 2022

Preprint

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A brief period of monocular deprivation (MD) in adults is known to induce short-term plasticity of the visual system. However, to what extent MD impacts beyond visual processing is unclear. Here, we investigated alterations of visual and audio-visual processing induced by MD measuring neural oscillations. Results revealed that MD modified neural activities associated with unimodal and multisensory processes in an eye-specific manner. Selectively for the Deprived eye, alpha activity was reduced within the first 150 ms of visual processing. Conversely, the response to audio-visual events was enhanced in the gamma range only for the Undeprived eye within 100-300 ms after stimulus onset. The analysis of gamma responses to unimodal auditory events clarified that MD elicited a crossmodal upweighting for the Undeprived eye. Source modeling suggested that the right parietal cortex played a major role in both visual and audio-visual MD effects. Notably, visual and audio-visual processing alterations emerged selectively for the induced (but not the evoked) component of the neural oscillations, indicating primary alterations in feedback connectivity. These findings support a model in which MD increases excitability for the Deprived eye and neural responsiveness to audio-visual and auditory events for the Undeprived eye. On the one hand, these results reveal the causal impact of MD on both unisensory and multisensory processes but with distinct frequency-specific profiles and, on the other hand, highlight the feedback nature of short-term neural plasticity. Overall this study shed light on the high flexibility and interdependence of the unimodal and multisensory functions.

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Section: Discussionsupporting

confidence: 90%

Section: The Impact Of MD On Audio-visual Processingmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Short-term monocular deprivation boosts neural responsiveness to audio-visual events for the undeprived eye

Federici

Bernardi

Senna³

et al. 2022

Preprint

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“…In fact, the lack of PSS shift under binocular viewing is consistent with studies that have assessed the impact on audiovisual temporal perception by visual phenomena that modulate perceived stimulus effectiveness. For example, Opoku-Baah and Wallace 63 showed that a brief period of monocular deprivation, a phenomenon known to boost perceived contrast in the deprived eye, did not significantly affect the PSS, although changes in the TBW were observed.…”

Section: Discussionmentioning

confidence: 99%

Binocular Enhancement of Multisensory Temporal Perception

Opoku-Baah

Wallace

2021

Invest. Ophthalmol. Vis. Sci.

Self Cite

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The goal of this study was to examine the behavioral effects and to suggest possible underlying mechanisms of binocularity on audiovisual temporal perception in normally-sighted individuals. METHODS. Participants performed two audiovisual simultaneity judgment tasks-one using simple flashes and beeps and the other using audiovisual speech stimuli-with the left eye, right eye, and both eyes. Two measures, the point of subjective simultaneity (PSS) and the temporal binding window (TBW), an index for audiovisual temporal acuity, were derived for each viewing condition, stimulus type, and participant. The data were then modeled using causal inference, allowing us to determine whether binocularity affected low-level unisensory mechanisms (i.e., sensory noise level) or high-level multisensory mechanisms (i.e., prior probability of interring a common cause, p C=1). RESULTS. Whereas for the PSS there was no significant effect of viewing condition, for the TBW, a significant interaction between stimulus type and viewing condition was found. Post hoc analyses revealed a significantly narrower TBW during binocular than monocular viewing (average of left and right eyes) for the flash-beep condition but no difference between the viewing conditions for the speech stimuli. Modeling results showed no significant difference in p C=1 but a significant reduction in sensory noise during binocular performance on flash-beep trials. CONCLUSIONS. Binocular viewing was found to enhance audiovisual temporal acuity as indexed by the TBW for simple low-level audiovisual stimuli. Furthermore, modeling results suggest that this effect may stem from enhanced sensory representations evidenced as a reduction in sensory noise affecting the measurement of physical asynchrony during audiovisual temporal perception.

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“…Another aspect of multisensory interactions that are affected by monocular deprivation includes the temporal binding of two multisensory stimuli. The deprived eye presents a sharper temporal acuity, whereas the non-deprived eye shows poorer temporal acuity after 1.5 hours of monocular deprivation (Opoku-Baah and Wallace 2020). These results are in line with homeostatic plasticity describing that the brain compensates the deprivation effect by enhancing the signals from the deprived eye.…”

Section: Visual Deprivation In the Sightedmentioning

confidence: 99%

Visual Plasticity in Adulthood: Perspectives from Hebbian and Homeostatic Plasticity

2021

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The visual system retains profound plastic potential in adulthood. In the current review, we summarize the evidence of preserved plasticity in the adult visual system during visual perceptual learning as well as both monocular and binocular visual deprivation. In each condition, we discuss how such evidence reflects two major cellular mechanisms of plasticity: Hebbian and homeostatic processes. We focus on how these two mechanisms work together to shape plasticity in the visual system. In addition, we discuss how these two mechanisms could be further revealed in future studies investigating cross-modal plasticity in the visual system.

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Brief period of monocular deprivation drives changes in audiovisual temporal perception

Cited by 5 publications

References 78 publications

Short-term monocular deprivation boosts neural responsiveness to audio-visual events for the undeprived eye

Short-term monocular deprivation boosts neural responsiveness to audio-visual events for the undeprived eye

Binocular Enhancement of Multisensory Temporal Perception

Visual Plasticity in Adulthood: Perspectives from Hebbian and Homeostatic Plasticity

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