Altered default mode network connectivity in older adults with cognitive complaints and amnestic mild cognitive impairment.

作者: Yang Wang , Shannon L. Risacher , John D. West , Brenna C. McDonald , Tamiko R. MaGee

DOI: 10.3233/JAD-130080

关键词: AudiologyEffects of sleep deprivation on cognitive performanceNeuroscienceAmnesiaNeuropsychologyDefault mode networkAtrophyPsychologyHippocampusCognitive impairmentCognition

摘要: Default mode network (DMN) disruption has been reported in Alzheimer's disease (AD), yet the specific pattern of altered connectivity over course prodromal AD remains to be characterized. The aim this study was assess DMN older adults with informant-verified cognitive complaints (CC) but normal neuropsychological performance compared individuals mild impairment (MCI) and healthy controls (HC). maps were derived from resting-state fMRI using independent component analysis. Group comparisons performed between MCI (n = 18), CC 23), HC 16). Both showed decreased right hippocampus HC, group showing greater than MCI. These differences survived atrophy correction correlated performance. appears sensitive early neurodegenerative changes associated AD, notably including pre-MCI complaints.

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