Abstract
Objective: Relationships between the apolipoprotein E ε4 allele and electroencephalographic (EEG) rhythmicity have been demonstrated in Alzheimer's disease (AD) patients but not in the preclinical stage prodromic to it, namely, mild cognitive impairment (MCI). The present multicentric EEG study tested the hypothesis that presence of ε4 affects sources of resting EEG rhythms in both MCI and AD subjects. Methods: We enrolled 89 MCI subjects (34.8% with ε4) and 103 AD patients (50.4% with ε4). Resting eyes-closed EEG data were recorded for all subjects. EEG rhythms of interest were delta (2-4Hz), theta (4-8Hz), alpha 1 (8-10.5Hz), alpha 2 (10.5-13Hz), beta 1 (13-20Hz), and beta 2 (20-30Hz). EEG cortical sources were estimated by low-resolution brain electromagnetic tomography. Results: Results showed that amplitude of alpha 1 and 2 sources in occipital, temporal, and limbic areas was lower in subjects carrying the ε4 allele than in those not carrying the ε4 allele (p <0.01). This was true for both MCI and AD. For the first time to our knowledge, a relationship was shown between ApoE genotype and global neurophysiological phenotype (ie, cortical alpha rhythmicity) in a preclinical AD condition, MCI, in addition to clinically manifest AD. Interpretation: Such a demonstration motivates future genotype-EEG phenotype studies for the early prediction of AD conversion in individual MCI subjects.
| Original language | English |
|---|---|
| Pages (from-to) | 323-334 |
| Number of pages | 12 |
| Journal | Annals of Neurology |
| Volume | 59 |
| Issue number | 2 |
| DOIs | |
| Publication status | Published - Feb 2006 |
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ASJC Scopus subject areas
- Neuroscience(all)
Cite this
Apolipoprotein E and alpha brain rhythms in mild cognitive impairment : A multicentric electroencephalogram study. / Babiloni, Claudio; Benussi, Luisa; Binetti, Giuliano; Cassetta, Emanuele; Dal Forno, Gloria; Del Percio, Claudio; Ferreri, Florinda; Ferri, Raffaele; Frisoni, Giovanni; Ghidoni, Roberta; Miniussi, Carlo; Rodriguez, Guido; Romani, Gian Luca; Squitti, Rosanna; Ventriglia, Maria Carla; Rossini, Paolo M.
In: Annals of Neurology, Vol. 59, No. 2, 02.2006, p. 323-334.Research output: Contribution to journal › Article
}
TY - JOUR
T1 - Apolipoprotein E and alpha brain rhythms in mild cognitive impairment
T2 - A multicentric electroencephalogram study
AU - Babiloni, Claudio
AU - Benussi, Luisa
AU - Binetti, Giuliano
AU - Cassetta, Emanuele
AU - Dal Forno, Gloria
AU - Del Percio, Claudio
AU - Ferreri, Florinda
AU - Ferri, Raffaele
AU - Frisoni, Giovanni
AU - Ghidoni, Roberta
AU - Miniussi, Carlo
AU - Rodriguez, Guido
AU - Romani, Gian Luca
AU - Squitti, Rosanna
AU - Ventriglia, Maria Carla
AU - Rossini, Paolo M.
PY - 2006/2
Y1 - 2006/2
N2 - Objective: Relationships between the apolipoprotein E ε4 allele and electroencephalographic (EEG) rhythmicity have been demonstrated in Alzheimer's disease (AD) patients but not in the preclinical stage prodromic to it, namely, mild cognitive impairment (MCI). The present multicentric EEG study tested the hypothesis that presence of ε4 affects sources of resting EEG rhythms in both MCI and AD subjects. Methods: We enrolled 89 MCI subjects (34.8% with ε4) and 103 AD patients (50.4% with ε4). Resting eyes-closed EEG data were recorded for all subjects. EEG rhythms of interest were delta (2-4Hz), theta (4-8Hz), alpha 1 (8-10.5Hz), alpha 2 (10.5-13Hz), beta 1 (13-20Hz), and beta 2 (20-30Hz). EEG cortical sources were estimated by low-resolution brain electromagnetic tomography. Results: Results showed that amplitude of alpha 1 and 2 sources in occipital, temporal, and limbic areas was lower in subjects carrying the ε4 allele than in those not carrying the ε4 allele (p <0.01). This was true for both MCI and AD. For the first time to our knowledge, a relationship was shown between ApoE genotype and global neurophysiological phenotype (ie, cortical alpha rhythmicity) in a preclinical AD condition, MCI, in addition to clinically manifest AD. Interpretation: Such a demonstration motivates future genotype-EEG phenotype studies for the early prediction of AD conversion in individual MCI subjects.
AB - Objective: Relationships between the apolipoprotein E ε4 allele and electroencephalographic (EEG) rhythmicity have been demonstrated in Alzheimer's disease (AD) patients but not in the preclinical stage prodromic to it, namely, mild cognitive impairment (MCI). The present multicentric EEG study tested the hypothesis that presence of ε4 affects sources of resting EEG rhythms in both MCI and AD subjects. Methods: We enrolled 89 MCI subjects (34.8% with ε4) and 103 AD patients (50.4% with ε4). Resting eyes-closed EEG data were recorded for all subjects. EEG rhythms of interest were delta (2-4Hz), theta (4-8Hz), alpha 1 (8-10.5Hz), alpha 2 (10.5-13Hz), beta 1 (13-20Hz), and beta 2 (20-30Hz). EEG cortical sources were estimated by low-resolution brain electromagnetic tomography. Results: Results showed that amplitude of alpha 1 and 2 sources in occipital, temporal, and limbic areas was lower in subjects carrying the ε4 allele than in those not carrying the ε4 allele (p <0.01). This was true for both MCI and AD. For the first time to our knowledge, a relationship was shown between ApoE genotype and global neurophysiological phenotype (ie, cortical alpha rhythmicity) in a preclinical AD condition, MCI, in addition to clinically manifest AD. Interpretation: Such a demonstration motivates future genotype-EEG phenotype studies for the early prediction of AD conversion in individual MCI subjects.
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U2 - 10.1002/ana.20724
DO - 10.1002/ana.20724
M3 - Article
VL - 59
SP - 323
EP - 334
JO - Annals of Neurology
JF - Annals of Neurology
SN - 0364-5134
IS - 2
ER -