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  • Title: Integrated neural representation of sound and temporal features in human auditory sensory memory: an event-related potential study.
    Author: Takegata R, Morotomi T.
    Journal: Neurosci Lett; 1999 Oct 29; 274(3):207-10. PubMed ID: 10548426.
    Abstract:
    The present study explored the effect of varying stimulus onset asynchrony (SOA) on the pre-attentive detection of frequency changes indexed by the mismatch negativity (MMN). Reading subjects were presented with sequences of tones delivered at two SOAs. Each sequence included either one or both of the two SOAs. In sequences with two SOAs, the order of the SOAs was alternated or sequenced randomly. The MMN amplitude was larger in sequences with one SOA than in those with two. The order of SOAs (alternate or random) had no effect on the MMN. These results revealed that the processings of frequency and SOA are not independent, suggesting that sound features and the timing of stimulation delivering the sound can be encoded into a functionally integrated representation.
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