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  Distant from input: Evidence of regions within the default mode network supporting perceptually-decoupled and conceptually-guided cognition

Murphy, C., Jefferies, E., Rueschemeyer, S.-A., Sormaz, M., Wang, H.-t., Margulies, D. S., et al. (2018). Distant from input: Evidence of regions within the default mode network supporting perceptually-decoupled and conceptually-guided cognition. NeuroImage, 171, 393-401. doi:10.1016/j.neuroimage.2018.01.017.

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Murphy_Jefferies_2017.pdf (Verlagsversion), 2MB
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 Urheber:
Murphy, Charlotte1, Autor
Jefferies, Elizabeth1, Autor
Rueschemeyer, Shirley-Ann1, Autor
Sormaz, Mladen1, Autor
Wang, Hao-ting1, Autor
Margulies, Daniel S.2, Autor           
Smallwood, Jonathan1, Autor
Affiliations:
1York Neuroimaging Centre, University of York, United Kingdom, ou_persistent22              
2Max Planck Research Group Neuroanatomy and Connectivity, MPI for Human Cognitive and Brain Sciences, Max Planck Society, ou_1356546              

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Schlagwörter: Transmodal cortex; Default mode network; Semantic; Conceptual processing; Stimulus independence
 Zusammenfassung: The default mode network supports a variety of mental operations such as semantic processing, episodic memory retrieval, mental time travel and mind-wandering, yet the commonalities between these functions remains unclear. One possibility is that this system supports cognition that is independent of the immediate environment; alternatively or additionally, it might support higher-order conceptual representations that draw together multiple features. We tested these accounts using a novel paradigm that separately manipulated the availability of perceptual information to guide decision-making and the representational complexity of this information. Using task based imaging we established regions that respond when cognition combines both stimulus independence with multi-modal information. These included left and right angular gyri and the left middle temporal gyrus. Although these sites were within the default mode network, they showed a stronger response to demanding memory judgements than to an easier perceptual task, contrary to the view that they support automatic aspects of cognition. In a subsequent analysis, we showed that these regions were located at the extreme end of a macroscale gradient, which describes gradual transitions from sensorimotor to transmodal cortex. This shift in the focus of neural activity towards transmodal, default mode, regions might reflect a process of where the functional distance from specific sensory enables conceptually rich and detailed cognitive states to be generated in the absence of input.

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Sprache(n): eng - English
 Datum: 2018-01-092017-06-222018-01-092018-01-122018-05-01
 Publikationsstatus: Erschienen
 Seiten: -
 Ort, Verlag, Ausgabe: -
 Inhaltsverzeichnis: -
 Art der Begutachtung: Expertenbegutachtung
 Identifikatoren: DOI: 10.1016/j.neuroimage.2018.01.017
PMID: 29339310
PMC: PMC5883322
Anderer: Epub 2018
 Art des Abschluß: -

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Projektname : -
Grant ID : BB/J006963/1
Förderprogramm : -
Förderorganisation : Biotechnology and Biological Sciences Research Council (BBSRC)
Projektname : Wedding bells or bedding wells? Lexical and semantic influences on phoneme binding / SEMBIND
Grant ID : 283530
Förderprogramm : Funding Programme 7
Förderorganisation : European Commission (EC)
Projektname : The role of DREAM in synaptic dysfunction in Alzheimer's disease / DREAM IN AD
Grant ID : 303701
Förderprogramm : Funding Programme 7
Förderorganisation : European Commission (EC)

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Titel: NeuroImage
Genre der Quelle: Zeitschrift
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Ort, Verlag, Ausgabe: Orlando, FL : Academic Press
Seiten: - Band / Heft: 171 Artikelnummer: - Start- / Endseite: 393 - 401 Identifikator: ISSN: 1053-8119
CoNE: https://pure.mpg.de/cone/journals/resource/954922650166