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Zusammenfassung

Im letzten Jahrzehnt gab es einen enormen Wissenszuwachs über die neuralen Grundlagen des kognitiven Alterns. Die funktionelle Bildgebung lieferte eine Reihe von überraschenden Erkenntnissen zu den Mechanismen, wie funktionelle Netzwerke altersbedingte anatomische Veränderungen kompensieren. In diesem Kapitel soll auf die wichtigsten kognitiven Domänen eingegangen werden, deren neurale Funktion sich mit zunehmendem Alter verändert. Dazu zählen das episodische Gedächtnis, die Exekutivfunktionen und die emotionale Verarbeitung. Diskutiert wird eine Reihe von aktuellen neurophysiologischen Modellen, welche das parallele Vorkommen von Unteraktivität auf der einen Seite und kompensatorischer Überaktivität auf der anderen Seite erklären. Neben der aufgabenspezifischen Aktivierung wird zudem die Untersuchung von spontanen Signalfluktuationen in sog. Resting-State-Netzwerken unter Ruhebedingungen beleuchtet. Abschließend soll auf technische und anatomische Besonderheiten eingegangen werden, welche die Analyse altersbedingter fMRT-Veränderungen beeinflussen können.

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Kukolja, J., Voss, B. (2013). Altersabhängige Effekte. In: Schneider, F., Fink, G.R. (eds) Funktionelle MRT in Psychiatrie und Neurologie. Springer, Berlin, Heidelberg. https://doi.org/10.1007/978-3-642-29800-4_14

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  • DOI: https://doi.org/10.1007/978-3-642-29800-4_14

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