Electromyographic Activity in the EEG in Alzheimer's Disease: Noise or Signal?
Table 2
EEG and EMG data.
Controls
MCI
AD
Eyes closed
EEG theta relative power (%)
28 (8)
29 (14)
53 (21)**##
Frontal EMG (μV²)
2 (1)
6 (5)
7 (7)*
Temporal EMG (μV²)
4 (4)
9 (8)
8 (10)
Eyes open
EEG alpha reactivity (%)
67 (20)
59 (18)
37 (32)**
Frontal EMG (μV²)a
6 (4)
16 (25)
24 (34)*
Temporal EMG (μV²)a
10 (8)
15 (25)
18 (30)
Memory activation
EEG alpha reactivity (%)
40 (33)
10 (32)
−7 (35)**
Frontal EMG (μV²)a
3 (2)
13 (15)
21 (41)
Temporal EMG (μV²)a
6 (5)
19 (26)
14 (16)
Values in the table are means with S.D. in parentheses. ANOVA was used to assess group differences, except for: aNonparametric two sample Kolmogorov-Smirnov tests were used. *differs from controls (P ≤ .05); **differs from controls (P ≤ .01); ##differs from MCI patients ().
