Deficits in Spontaneous Cognition as an Early Marker of Alzheimer’s Disease

Lia Kvavilashvili, Agnieszka Niedzwienska, Sam Gilbert, Ioanna Markostamou

Research output: Contribution to journalArticlepeer-review

16 Citations (Scopus)
38 Downloads (Pure)

Abstract

In the absence of a pharmacological cure, finding the most sensitive early cognitive markers of Alzheimer's disease (AD) is becoming increasingly important. In this article we review evidence showing that brain mechanisms of spontaneous, but stimulus-dependent, cognition overlap with key hubs of the default mode network (DMN) that become compromised by amyloid pathology years before the clinical symptoms of AD. This leads to the formulation of a novel hypothesis which predicts that spontaneous, but stimulus-dependent, conscious retrieval processes, that are generally intact in healthy aging, will be particularly compromised in people at the earliest stages of AD. Initial evidence for this hypothesis is presented across diverse experimental paradigms (e.g., prospective memory, mind-wandering), and new avenues for research in this area are outlined.

Original languageEnglish
Pages (from-to)285-301
Number of pages17
JournalTrends in Cognitive Sciences
Volume24
Issue number4
Early online date24 Feb 2020
DOIs
Publication statusPublished - Apr 2020

Keywords

  • Default Mode Network
  • mind-wandering
  • Prospective memory
  • involuntary memory
  • spontaneous retrieval
  • mild cognitive impairment
  • posterior cingulate cortex
  • prospective memory
  • default mode network

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