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Table 2 Full spectrum vs. periodic EEG relative powers in different brain regions

From: Beta to theta power ratio in EEG periodic components as a potential biomarker in mild cognitive impairment and Alzheimer’s dementia

 

Full Power Spectrum (All Oscillations)

Periodic Components or Oscillations

F

ANCOVA p-value (post-hoc p-values HC vs. MCI, HC vs. AD, MCI vs. AD)

Observed power

F

ANCOVA p-value (post-hoc p-values HC vs. MCI, HC vs. AD, MCI vs. AD)

Observed power

Delta in frontal region

2.510

0.060

0.62

14.516

< 0.001 (1.000, < 0.001, < 0.001)

1

Theta in frontal region

10.974

< 0.001 (0.660, < 0.001, < 0.001)

1

22.396

< 0.001 (0.252, < 0.001, < 0.001)

1

Alpha in frontal region

3.369

0.020 (1.000, 0.041, 0.012)

0.76

0.896

0.444

0.24

Beta in frontal region

3.233

0.023 (0.660, 0.015, 0.033)

0.74

7.961

< 0.001 (0.786, < 0.001, < 0.001)

0.99

Gamma in frontal region

13.457

< 0.001 (1.000, < 0.001, < 0.001)

1

21.086

< 0.001 (0.541, < 0.001, < 0.001)

1

FSA ratio in frontal region

7.839

< 0.001 (0.713, < 0.001, < 0.001)

0.99

23.918

< 0.001 (0.219, < 0.001, < 0.001)

1

Delta in temporal region

2.720

0.046 (1.000, 0.077, 0.110)

0.66

18.053

< 0.001 (1.000, < 0.001, < 0.001)

1

Theta in temporal region

12.252

< 0.001 (0.366, < 0.001, < 0.001)

1

24.591

< 0.001 (0.192, < 0.001, < 0.001)

1

Alpha in temporal region

5.322

0.002 (1.000, 0.004, 0.002)

0.93

1.275

0.284

0.34

Beta in temporal region

7.620

< 0.001 (0.421, < 0.001, < 0.001)

0.99

26.335

< 0.001 (0.335, < 0.001, < 0.001)

1

Gamma in temporal region

16.176

< 0.001 (1.000, < 0.001, < 0.001)

1

28.305

< 0.001 (0.459, < 0.001, < 0.001)

1

FSA ratio in temporal region

10.659

< 0.001 (0.339, < 0.001, < 0.001)

1

30.223

< 0.001 (0.164, < 0.001, < 0.001)

1

Delta in central region

1.315

0.271

0.35

12.863

< 0.001 (1.000, < 0.001, < 0.001)

1

Theta in central region

13.352

< 0.001 (0.892, < 0.001, < 0.001)

1

26.082

< 0.001 (0.483, < 0.001, < 0.001)

1

Alpha in central region

0.477

0.698

0.15

0.511

0.675

0.15

Beta in central region

7.139

< 0.001 (0.721, < 0.001, 0.001)

0.98

16.331

< 0.001 (0.699, < 0.001, < 0.001)

1

Gamma in central region

11.950

< 0.001 (1.000, < 0.001, < 0.001)

1

18.738

< 0.001 (0.664, < 0.001, < 0.001)

1

FSA ratio in central region

11.440

< 0.001 (0.705, < 0.001, < 0.001)

1

28.458

< 0.001 (0.429, < 0.001, < 0.001)

1

Delta in parietal region

3.368

0.020 (1.000, 0.032, 0.041)

0.78

18.110

< 0.001 (1.000, < 0.001, < 0.001)

1

Theta in parietal region

14.218

< 0.001 (0.859, < 0.001, < 0.001)

1

25.526

< 0.001 (0.463, < 0.001, < 0.001)

1

Alpha in parietal region

2.560

0.056

0.62

0.540

0.656

0.16

Beta in parietal region

6.323

< 0.001 (0.502, < 0.001, < 0.001)

0.97

11.123

< 0.001 (0.427, < 0.001, < 0.001)

1

Gamma in parietal region

15.532

< 0.001 (1.000, < 0.001, < 0.001)

1

23.880

< 0.001 (1.000, < 0.001, < 0.001)

1

FSA ratio in parietal region

12.331

< 0.001 (0.520, < 0.001, < 0.001)

1

30.233

< 0.001 (0.280, < 0.001, < 0.001)

1

Delta in occipital region

3.785

0.011 (1.000, 0.142, 0.019)

0.81

23.919

< 0.001 (1.000, < 0.001, < 0.001)

1

Theta in occipital region

10.142

< 0.001 (0.482, < 0.001, < 0.001)

1

22.913

< 0.001 (0.179, < 0.001, < 0.001)

1

Alpha in occipital region

6.670

< 0.001 (1.000, 0.014, < 0.001)

0.97

3.978

0.009 (0.878, 0.239, 0.005)

0.83

Beta in occipital region

1.878

0.135

0.48

6.529

< 0.001 (0.165, 0.001, 0.021)

0.97

Gamma in occipital region

25.417

< 0.001 (1.000, < 0.001, < 0.001)

1

27.331

< 0.001 (1.000, < 0.001, < 0.001)

1

FSA ratio in occipital region

7.011

< 0.001 (0.283, < 0.001, 0.001)

0.98

28.456

< 0.001 (0.036, < 0.001, < 0.001)

1

  1. The post-hoc comparisons were done when ANCOVA p-values < 0.05. The degrees of freedom for all the tests between-subjects effects were 3
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Alzheimer's Research & Therapy

ISSN: 1758-9193