Isolating Neural Signatures of Conscious Speech Perception with a No-Report Sine-Wave Speech Paradigm.
The Journal of neuroscience : the official journal of the Society for Neuroscience February 21, 2024 Yunkai Zhu, Charlotte Li, Camille Hendry et al. 8 citations
A left-lateralized, near-vertex negativity in EEG, occurring 200–300 ms after stimulus onset, distinguishes sine-wave speech tokens perceived as speech from those perceived as noise, even when task-irrelevant. This response, interpreted as a phonological perceptual awareness negativity, was absent for frequency-flipped control tokens never perceived as speech. The P3b component was enhanced only for tokens both perceived as speech and task-relevant. The findings suggest that neural correlates of conscious perception, across different types of conscious content, are most likely midlatency negative-going brain responses in content-specific sensory areas.