Diminished neural network dynamics in amnestic mild cognitive impairment.
Diminished neural network dynamics in amnestic mild cognitive impairment.
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DOI:
10.1016/j.ijpsycho.2018.05.001
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发表时间:
2018-08
期刊:
影响因子:
--
通讯作者:
Hillary FG
中科院分区:
文献类型:
--
作者:
Brenner EK;Hampstead BM;Grossner EC;Bernier RA;Gilbert N;Sathian K;Hillary FG
Mild cognitive impairment (MCI) is widely regarded as an intermediate stage between typical aging and dementia, with nearly 50% of patients with amnestic MCI (aMCI) converting to Alzheimer’s dementia (AD) within 30 months of follow-up. The growing literature using resting-state functional magnetic resonance imaging reveals both increased and decreased connectivity in individuals with MCI and connectivity loss between the anterior and posterior components of the default mode network (DMN) throughout the course of the disease progression. In this paper, we use dynamic connectivity modeling and graph theory to identify unique brain “states,” or temporal patterns of connectivity across distributed networks, that distinguish individuals with aMCI from healthy older adults (HOAs). We enrolled 44 individuals diagnosed with aMCI and 33 HOAs of comparable age and education. Our results indicated that individuals with aMCI spent significantly more time in one state in particular, whereas neural network analysis in the HOA sample revealed approximately equivalent representation across four distinct states. Among individuals with aMCI, spending a higher proportion of time in the dominant state relative to a state where participants exhibited high cost (a measure combining connectivity and distance), predicted better language performance and perseveration. This is the first report to examine neural network dynamics in individuals with aMCI.
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DOI:
10.1080/13854049308401518
发表时间:
1993-04-01
期刊:
The Clinical neuropsychologist
影响因子:
--
作者:
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通讯作者:
Paulsen, Jane S
影响因子:
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作者:
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Calhoun, Vince D.
影响因子:
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通讯作者:
Kiviniemi, Vesa
影响因子:
4.8
作者:
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通讯作者:
DeLuca, John
影响因子:
5.7
作者:
Calhoun VD;Liu J;Adali T
通讯作者:
Adali T