%0 Journal Article
%A Niedernhuber, Maria
%A Raimondo, Federico
%A Sitt, Jacobo D.
%A Bekinschtein, Tristan A.
%T Sensory target detection at local and global timescales reveals a hierarchy of supramodal dynamics in the human cortex
%J The journal of neuroscience
%V 42
%N 46
%@ 0270-6474
%C Washington, DC
%I Soc.
%M FZJ-2022-05878
%P JN-RM-0658-22
%D 2022
%X To ensure survival in a dynamic environment, the human neocortex monitors input streams from different sensory organs for important sensory events. Which principles govern whether different senses share common or modality-specific brain networks for sensory target detection? We examined whether complex targets evoke sustained supramodal activity while simple targets rely on modality-specific networks with short-lived supramodal contributions. In a series of hierarchical multisensory target detection studies (n = 77, of either sex) using EEG, we applied a temporal cross-decoding approach to dissociate supramodal and modality-specific cortical dynamics elicited by rule-based global and feature-based local sensory deviations within and between the visual, somatosensory, and auditory modality. Our data show that each sense implements a cortical hierarchy orchestrating supramodal target detection responses, which operate at local and global timescales in successive processing stages. Across different sensory modalities, simple feature-based sensory deviations presented in temporal vicinity to a monotonous input stream triggered a mismatch negativity-like local signal which decayed quickly and early, whereas complex rule-based targets tracked across time evoked a P3b-like global neural response which generalized across a late time window. Converging results from temporal cross-modality decoding analyses across different datasets, we reveal that global neural responses are sustained in a supramodal higher-order network, whereas local neural responses canonically thought to rely on modality-specific regions evolve into short-lived supramodal activity. Together, our findings demonstrate that cortical organization largely follows a gradient in which short-lived modality-specific as well as supramodal processes dominate local responses, whereas higher-order processes encode temporally extended abstract supramodal information fed forward from modality-specific cortices.
%F PUB:(DE-HGF)16
%9 Journal Article
%$ 36223999
%U <Go to ISI:>//WOS:000903701700013
%R 10.1523/JNEUROSCI.0658-22.2022
%U https://juser.fz-juelich.de/record/916032