Resting state EEG Abnormalities and their Relationship with TMS‐EEG induced Cortical Excitability in Alzheimer's Dementia Article Swipe
Hiba Alhabbal
,
Gifty Asare
,
Renée P Lawson
,
Hamed Azami
,
Reza Zomorrodi
,
Robert Chen
,
Daniel M. Blumberger
,
Benoit H. Mulsant
,
Bruce G. Pollock
,
Tarek K. Rajji
,
Sanjeev Kumar
·
YOU?
·
· 2024
· Open Access
·
· DOI: https://doi.org/10.1002/alz.088412
YOU?
·
· 2024
· Open Access
·
· DOI: https://doi.org/10.1002/alz.088412
Background Previous literature has identified slowing of resting state electroencephalography (EEG) rhythm and abnormal cortical excitation in Alzheimer’s Dementia (AD). However, the relationship between these two divergent functional abnormalities and cognitive symptoms of AD are not well understood. Method Resting state EEG signal was recorded in participants with AD and HCs for 5 minutes with eyes closed. Relative resting state EEG power was measured for the five frequency bands. Participants underwent a single pulse transcranial magnetic stimulation (TMS) combined with EEG. Cortical evoked activity (CEA) was assessed using TMS‐evoked potential (TEP) rectified area under the curve (AUC) from 25 to 80 ms post‐TMS stimulus, and the TEPs peak amplitudes were calculated by taking the maximal peak in the following time windows: 25 – 35 ms (P30), 40 – 50 ms (N45), and 55 – 65 ms (P60). Result Compared to 32 HC (18 females; mean ± SD age: 69.3 ± 7.9 years), 52 participants with AD (32 females; 74.2 ± 8.5 years) had higher relative theta power than HCs (t(66.6) = 5.34, p<0.001). AD participants also had a significantly lower alpha power (t(76) = ‐3.03, p=0.003) and beta power (t(76) = ‐2.51, p=0.014) than HCs. Controlling for sex, age and years of education, AD participants showed a positive association between theta power and CEA (r partial =0.573, p=0.008); and an inverse association between alpha power and CEA (r partial =‐0.471, p=0.036). Theta power in AD participants showed a positive association with P60 (r partial =‐0.637, p=0.003) and an inverse association with N45 (r partial =‐0.512, p=0.025), while alpha power was inversely associated with P60 (r partial =‐0.531, p=0.016). Conclusion This study showed a positive association between resting state EEG slowing and increased cortical excitability in AD, indicating a possible shared mechanistic pathway between these abnormalities.
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- Type
- article
- Language
- en
- Landing Page
- https://doi.org/10.1002/alz.088412
- OA Status
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- Related Works
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- OpenAlex ID
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https://openalex.org/W4406201605Canonical identifier for this work in OpenAlex
- DOI
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https://doi.org/10.1002/alz.088412Digital Object Identifier
- Title
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Resting state EEG Abnormalities and their Relationship with TMS‐EEG induced Cortical Excitability in Alzheimer's DementiaWork title
- Type
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articleOpenAlex work type
- Language
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enPrimary language
- Publication year
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2024Year of publication
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2024-12-01Full publication date if available
- Authors
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Hiba Alhabbal, Gifty Asare, Renée P Lawson, Hamed Azami, Reza Zomorrodi, Robert Chen, Daniel M. Blumberger, Benoit H. Mulsant, Bruce G. Pollock, Tarek K. Rajji, Sanjeev KumarList of authors in order
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YesWhether a free full text is available
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hybridOpen access status per OpenAlex
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https://doi.org/10.1002/alz.088412Direct OA link when available
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Electroencephalography, Transcranial magnetic stimulation, Resting state fMRI, Audiology, Dementia, Psychology, Neuroscience, Medicine, Internal medicine, Cardiology, Stimulation, DiseaseTop concepts (fields/topics) attached by OpenAlex
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