Implicit estimation of sound-arrival time

Sugita, Yoichi; Suzuki, Yôiti

doi:10.1038/421911a

Cited by 186 publications

(162 citation statements)

References 3 publications

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“…Shifts in perceived AV simultaneity following lag-adaptation (Fujisaki et al, 2004;Miyazaki et al, 2006;Vroomen et al, 2004;Yamamoto et al, 2012) have been hypothesized to originate from mechanisms capable of adjusting the neural processing time across sensory modalities (Fujisaki et al, 2004;Moutoussis and Zeki, 1997;Stone et al, 2001;Sugita and Suzuki, 2003;Zeki and Bartels, 1998). In support of this hypothesis, our study reveals that such mechanisms may be implemented as phase shifts of neural oscillations: contrasting the sensory responses before and after AV lag-adaptation provided no evidence for a latency code hypothesis and instead revealed significant phase shifts of the entrained 1 Hz neural oscillations.…”

Section: Discussionsupporting

confidence: 62%

Encoding of event timing in the phase of neural oscillations

2014

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a b s t r a c t a r t i c l e i n f oTime perception is a critical component of conscious experience. To be in synchrony with the environment, the brain must deal not only with differences in the speed of light and sound but also with its computational and neural transmission delays. Here, we asked whether the brain could actively compensate for temporal delays by changing its processing time. Specifically, can changes in neural timing or in the phase of neural oscillation index perceived timing? For this, a lag-adaptation paradigm was used to manipulate participants' perceived audiovisual (AV) simultaneity of events while they were recorded with magnetoencephalography (MEG). Desynchronized AV stimuli were presented rhythmically to elicit a robust 1 Hz frequency-tagging of auditory and visual cortical responses. As participants' perception of AV simultaneity shifted, systematic changes in the phase of entrained neural oscillations were observed. This suggests that neural entrainment is not a passive response and that the entrained neural oscillation shifts in time. Crucially, our results indicate that shifts in neural timing in auditory cortices linearly map participants' perceived AV simultaneity. To our knowledge, these results provide the first mechanistic evidence for active neural compensation in the encoding of sensory event timing in support of the emergence of time awareness.

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Section: Discussionsupporting

confidence: 62%

Encoding of event timing in the phase of neural oscillations

2014

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“…The similarity of TOT across sensory modalities for simple stimuli is surprising given the differences of neural latencies between audition (Celesia 1976;Lakatos et al 2005) and vision (Buchner et al 1997;Schroeder 1998;Zeki 2001). Several groups have suggested the possibility of mechanisms compensating for the neural delays across the senses (Engel & Dougherty 1971;Sugita & Suzuki 2003;Kopinska & Harris 2004), but they remain controversial (Lewald & Guski 2004;Arnold et al 2005) and may not take place below the 'horizon of simultaneity', i.e. when auditory and visual sources are less than 10 m away from the observer (Pö ppel 1988;Pö ppel et al 1990).…”

Section: Two-way Non-identity Problemmentioning

confidence: 99%

Minding time in an amodal representational space

Wassenhove

2009

Phil. Trans. R. Soc. B

157

111

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How long did it take you to read this sentence? Chances are your response is a ball park estimate and its value depends on how fast you have scanned the text, how prepared you have been for this question, perhaps your mood or how much attention you have paid to these words. Time perception is here addressed in three sections. The first section summarizes theoretical difficulties in time perception research, specifically those pertaining to the representation of time and temporal processing. The second section reviews non-exhaustively temporal effects in multisensory perception. Sensory modalities interact in temporal judgement tasks, suggesting that (i) at some level of sensory analysis, the temporal properties across senses can be integrated in building a time percept and (ii) the representational format across senses is compatible for establishing such a percept. In the last section, a two-step analysis of temporal properties is sketched out. In the first step, it is proposed that temporal properties are automatically encoded at early stages of sensory analysis, thus providing the raw material for the building of a time percept; in the second step, time representations become available to perception through attentional gating of the raw temporal representations and via re-encoding into abstract representations.

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“…Rather, they are common across every instance wherein experimenters have inferred a shift in neural processing times on the basis of an apparent PSS shift in different experimental conditions (e.g. colour-motion asynchrony, Moutoussis & Zeki, 1997a;audio-visual synchrony with viewing distance, Sugita & Suzuki, 2003;prior entry, Schneider & Bavelier, 2003). However, note that we are not claiming that the particular interpretation we reach here (regarding the relative contribution of differential delays and the placement of criteria) will generalise to all, or indeed to any, of these other cases.…”

Section: Our Sj Dataset -Temporal Recalibrationmentioning

confidence: 99%

“…Fujisaki, Shimojo, Kashino & Nishida, 2004;Moutoussis & Zeki, 1997a;Moutoussis & Zeki, 1997b;Stone et al, 2002) and temporal order judgements (TOJs; e.g. Eagleman & Sejnowski, 2000;McDonald, Teder-Salejarvi, Di Russo & Hillyard, 2005;Sugita & Suzuki, 2003). In SJs, participants are shown a combination of two, or more, events and are asked whether or not they were synchronous.…”

Section: Estimating Perceived Timingmentioning

confidence: 99%