Abstract：
:The concept of perceptual inferences taking place over multiple timescales simultaneously raises questions about how the brain can balance the demands of remaining sensitive to local rarity while utilising more global longer-term predictability to modulate cortical responses. In the present study auditory evoked potentials to four presentations of the same sound sequence containing predictable structure on a local (milliseconds to seconds) and more global (many minutes) timescales were recorded. The results from 33 participants are used to demonstrate that predictions about both local (internal predictive models) and global (meta-models that define expected precisions associated with familiar internal model states) regularities are formed. The study exposes more local context-based modulations of the P1 but more global order-based modulations of the auditory evoked N2 components. The results are discussed in terms of theoretical links advocating that uncertainty at multiple timescales could lead to differential component modulations, and the importance of considering the broader learning context in auditory evoked potential studies.
journal_name
Hear Resjournal_title
Hearing researchauthors
Todd J,Frost JD,Yeark M,Paton Bdoi
10.1016/j.heares.2020.107975subject
Has Abstractpub_date
2021-01-01 00:00:00pages
107975eissn
0378-5955issn
1878-5891pii
S0378-5955(19)30463-0journal_volume
399pub_type
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