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• W2766094414 abstract "Changes in functional connectivity of cortical networks have been observed in resting-state EEG studies in healthy aging as well as preclinical and clinical stages of AD. Little information, however, exists on associations between EEG connectivity and cortical amyloid load in people with subjective memory complaints. Here, we determined the association of global cortical amyloid load, as measured by florbetapir-PET, with functional connectivity based on the phase-lag index of resting state EEG data for alpha and beta frequency bands in 318 cognitively normal individuals aged 70–85 years with subjective memory complaints from the INSIGHT-preAD cohort. Within the entire group we did not find any significant associations between global amyloid load and phase-lag index in any frequency band. Assessing exclusively the subgroup of amyloid-positive participants, we found enhancement of functional connectivity with higher global amyloid load in the alpha and a reduction in the beta frequency bands. In the amyloid-negative participants, higher amyloid load was associated with lower connectivity in the low alpha band. However, these correlations failed to reach significance after controlling for multiple comparisons. The absence of a strong amyloid effect on functional connectivity may represent a selection effect, where individuals remain in the cognitively normal group only if amyloid accumulation does not impair cortical functional connectivity." @default.
• W2766094414 created "2017-11-10" @default.
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• W2766094414 date "2018-01-01" @default.
• W2766094414 modified "2023-10-09" @default.
• W2766094414 title "No association of cortical amyloid load and EEG connectivity in older people with subjective memory complaints" @default.
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• W2766094414 doi "https://doi.org/10.1016/j.nicl.2017.10.031" @default.
• W2766094414 hasPubMedCentralId "https://www.ncbi.nlm.nih.gov/pmc/articles/5684495" @default.
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