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Lookup NU author(s): Dr Ryan Calmus, Dr Yuki Kikuchi, Professor Tim GriffithsORCiD, Professor Christopher Petkov
This work is licensed under a Creative Commons Attribution 4.0 International License (CC BY 4.0).
© 2023, Springer Nature Limited.The human brain extracts meaning using an extensive neural system for semantic knowledge. Whether broadly distributed systems depend on or can compensate after losing a highly interconnected hub is controversial. We report intracranial recordings from two patients during a speech prediction task, obtained minutes before and after neurosurgical treatment requiring disconnection of the left anterior temporal lobe (ATL), a candidate semantic knowledge hub. Informed by modern diaschisis and predictive coding frameworks, we tested hypotheses ranging from solely neural network disruption to complete compensation by the indirectly affected language-related and speech-processing sites. Immediately after ATL disconnection, we observed neurophysiological alterations in the recorded frontal and auditory sites, providing direct evidence for the importance of the ATL as a semantic hub. We also obtained evidence for rapid, albeit incomplete, attempts at neural network compensation, with neural impact largely in the forms stipulated by the predictive coding framework, in specificity, and the modern diaschisis framework, more generally. The overall results validate these frameworks and reveal an immediate impact and capability of the human brain to adjust after losing a brain hub.
Author(s): Kocsis Z, Jenison RL, Taylor PN, Calmus RM, McMurray B, Rhone AE, Sarrett MCE, Deifelt Streese C, Kikuchi Y, Gander PE, Berger JI, Kovach CK, Choi I, Greenlee JD, Kawasaki H, Cope TE, Griffiths TD, Howard MA, Petkov CI
Publication type: Article
Publication status: Published
Journal: Nature Communications
Year: 2023
Volume: 14
Issue: 1
Online publication date: 07/10/2023
Acceptance date: 28/09/2023
Date deposited: 01/11/2023
ISSN (electronic): 2041-1723
Publisher: Nature Research
URL: https://doi.org/10.1038/s41467-023-42088-7
DOI: 10.1038/s41467-023-42088-7
PubMed id: 37805497
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