Neural adaptation to silence in the human auditory cortex: a magnetoencephalographic study

Okamoto, Hidehiko; Kakigi, Ryusuke

doi:10.1002/brb3.290

Cited by 7 publications

(6 citation statements)

References 35 publications

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“…Previous research has shown that transient responses to the onset of an acoustic stimulus are exhibited by some neurons in the auditory cortex of rats [52, 53] and humans [54, 55]. If similar response patterns are present in our ECoG data, we can expect the performance of our phoneme likelihood estimator to vary throughout the duration any given utterance.…”

Section: Resultsmentioning

confidence: 80%

Neural speech recognition: continuous phoneme decoding using spatiotemporal representations of human cortical activity

et al. 2016

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The superior temporal gyrus (STG) and neighboring brain regions play a key role in human language processing. Previous studies have attempted to reconstruct speech information from brain activity in the STG, but few of them incorporate the probabilistic framework and engineering methodology used in modern speech recognition systems. In this work, we describe the initial efforts toward the design of a neural speech recognition (NSR) system that performs continuous phoneme recognition on English stimuli with arbitrary vocabulary sizes using the high gamma band power of local field potentials in the STG and neighboring cortical areas obtained via electrocorticography. The system implements a Viterbi decoder that incorporates phoneme likelihood estimates from a linear discriminant analysis model and transition probabilities from an n-gram phonemic language model. Grid searches were used in an attempt to determine optimal parameterizations of the feature vectors and Viterbi decoder. The performance of the system was significantly improved by using spatiotemporal representations of the neural activity (as opposed to purely spatial representations) and by including language modeling and Viterbi decoding in the NSR system. These results emphasize the importance of modeling the temporal dynamics of neural responses when analyzing their variations with respect to varying stimuli and demonstrate that speech recognition techniques can be successfully leveraged when decoding speech from neural signals. Guided by the results detailed in this work, further development of the NSR system could have applications in the fields of automatic speech recognition and neural prosthetics.

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Section: Resultsmentioning

confidence: 80%

Neural speech recognition: continuous phoneme decoding using spatiotemporal representations of human cortical activity

et al. 2016

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“…Studies on auditory information processing have also shown that when auditory stimuli were presented precedingly, the amplitude of the N1 component induced by the first sound stimulus was the largest, and the N1 induced by the subsequent sound stimulus was significantly reduced (Budd et al., 1998; Okamoto & Kakigi, 2014). In the present study, we found the effect of RS on the SiFI.…”

Section: Discussionmentioning

confidence: 99%

Repetition Suppression in Visual and Auditory Modalities Affects the Sound-Induced Flash Illusion

Wang¹,

Heng

et al. 2021

Perception

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Sound-induced flash illusion (SiFI) refers to the illusion that the number of visual flashes is equal to the number of auditory sounds when the visual flashes are accompanied by an unequal number of auditory sounds presented within 100 ms. The effect of repetition suppression (RS), an adaptive effect caused by stimulus repetition, upon the SiFI has not been investigated. Based on the classic SiFI paradigm, the present study investigated whether RS would affect the SiFI differently by adding preceding stimuli in visual and auditory modalities prior to the appearance of audiovisual stimuli. The results showed the auditory RS effect on the SiFI varied with the number of preceding auditory stimuli. The hit rate was higher with two preceding auditory stimuli than one preceding auditory stimulus in fission illusion, but it did not affect the size of the fusion illusion. However, the visual RS had no effect on the size of the fission and fusion illusions. The present study suggested that RS could affect the SiFI, indicating that the RS effect in different modalities would differentially affect the magnitude of the SiFI. In the process of multisensory integration, the visual and auditory modalities had asymmetrical RS effects.

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“…Subjects were asked to stay in a relaxed waking state during the measurement, and not to pay attention to the sound stimuli. To control for confounding changes in attention and vigilance, subjects watched a soundless movie of their choice (Fujioka et al, 2006; Boh et al, 2011; Okamoto and Kakigi, 2014). Alertness and compliance were verified by video monitoring.…”

Section: Methodsmentioning

confidence: 99%

Shared Neural Mechanisms for the Prediction of Own and Partner Musical Sequences after Short-term Piano Duet Training

et al. 2017

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Predictive mechanisms in the human brain can be investigated using markers for prediction violations like the mismatch negativity (MMN). Short-term piano training increases the MMN for melodic and rhythmic deviations in the training material. This increase occurs only when the material is actually played, not when it is only perceived through listening, suggesting that learning predictions about upcoming musical events are derived from motor involvement. However, music is often performed in concert with others. In this case, predictions about upcoming actions from a partner are a crucial part of the performance. In the present experiment, we use magnetoencephalography (MEG) to measure MMNs to deviations in one's own and a partner's musical material after both engaged in musical duet training. Event-related field (ERF) results revealed that the MMN increased significantly for own and partner material suggesting a neural representation of the partner's part in a duet situation. Source analysis using beamforming revealed common activations in auditory, inferior frontal, and parietal areas, similar to previous results for single players, but also a pronounced contribution from the cerebellum. In addition, activation of the precuneus and the medial frontal cortex was observed, presumably related to the need to distinguish between own and partner material.

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Neural adaptation to silence in the human auditory cortex: a magnetoencephalographic study

Cited by 7 publications

References 35 publications

Neural speech recognition: continuous phoneme decoding using spatiotemporal representations of human cortical activity

Neural speech recognition: continuous phoneme decoding using spatiotemporal representations of human cortical activity

Repetition Suppression in Visual and Auditory Modalities Affects the Sound-Induced Flash Illusion

Shared Neural Mechanisms for the Prediction of Own and Partner Musical Sequences after Short-term Piano Duet Training

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