Passive exposure to speech sounds induces long-term memory representations in the auditory cortex of adult rats
Kurkela, J., Lipponen, A., Hämäläinen, J., Näätänen, R., & Astikainen, P. (2016). Passive exposure to speech sounds induces long-term memory representations in the auditory cortex of adult rats. Scientific Reports, 6, Article 38904. https://doi.org/10.1038/srep38904
Julkaistu sarjassa
Scientific ReportsPäivämäärä
2016Tekijänoikeudet
© The Author(s) 2016. This work is licensed under a Creative Commons Attribution 4.0 International License.
Experience-induced changes in the functioning of the auditory cortex are prominent in early life,
especially during a critical period. Although auditory perceptual learning takes place automatically
during this critical period, it is thought to require active training in later life. Previous studies
demonstrated rapid changes in single-cell responses of anesthetized adult animals while exposed to
sounds presented in a statistical learning paradigm. However, whether passive exposure to sounds
can form long-term memory representations remains to be demonstrated. To investigate this issue,
we first exposed adult rats to human speech sounds for 3 consecutive days, 12h/d. Two groups of rats
exposed to either spectrotemporal or tonal changes in speech sounds served as controls for each other.
Then, electrophysiological brain responses from the auditory cortex were recorded to the same stimuli.
In both the exposure and test phase statistical learning paradigm, was applied. The exposure effect
was found for the spectrotemporal sounds, but not for the tonal sounds. Only the animals exposed to
spectrotemporal sounds differentiated subtle changes in these stimuli as indexed by the mismatch
negativity response. The results point to the occurrence of long-term memory traces for the speech
sounds due to passive exposure in adult animals.
...
Julkaisija
Nature Publishing GroupISSN Hae Julkaisufoorumista
2045-2322Julkaisu tutkimustietojärjestelmässä
https://converis.jyu.fi/converis/portal/detail/Publication/26446414
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