Analysis Of Eeg Data

Published Date: 02 Nov 2017

The following tables gives an example of data in relaxation mood, Happy Mood, Sad Mood , National Mood and Romantic mood. The table shows the data of all four frequency power band but we are mainly interested in alpha power. Here we also calculate the mean alpha power frequency. Here data is organized as left hemisphere, right hemisphere and center hemisphere.

Table 5.3 Region wise EEG data of different electrodes in Relax mode activity

Electrodes

Relax Mode Data

LEFT

Delta

Theta

Alpha

Beta

FP1

35.6103

3.5481

4.6464

0.5255

F7

2.4355

1.3567

2.4596

0.3209

F3

1.8238

2.0455

2.8732

0.4153

T3

2.9690

1.7614

3.9927

0.4784

C3

2.0352

2.3046

4.4003

0.5576

T5

5.5307

3.1015

6.1443

1.1402

P3

4.7882

2.3330

8.5043

1.1718

O1

5.7080

1.9960

5.0902

0.7647

RIGHT

4.7639

FP2

29.7743

3.0996

4.6725

0.4900

F4

3.4488

2.2423

4.0260

0.4723

F8

2.8876

1.6173

2.9427

0.3082

C4

2.0860

1.8796

3.4426

0.4414

T4

4.1827

2.0405

3.8801

0.4331

P4

5.0356

2.4873

7.7844

1.2853

T6

6.5844

2.9964

6.0259

1.0301

O2

7.6146

2.4360

6.3103

0.9118

CENTER

4.8856

FZ

2.5157

2.1756

3.9586

0.4242

Cz

2.6230

2.3348

3.3660

0.4605

P2

4.2331

2.6648

8.1473

1.0475

5.157368

The table 5.3 shows the values of delta(δ),Theta(θ),Alpha(α),and Beta(β) frequency power band during relaxation mode. The Electrodes are divided according to the brain region as left hemisphere, right hemisphere and center hemisphere.

Table 5.4 Region wise EEG data of different electrodes in Happy mode activity

Electrodes

Happy Song Mode

LEFT

Delta

Theta

Alpha

Beta

FP1

9.9429

1.7280

2.9787

0.4807

F7

2.0817

0.7171

1.4383

0.2550

F3

1.4630

1.0268

1.5347

0.3371

T3

1.7695

0.8524

2.6366

0.3867

C3

1.5109

1.0891

3.3451

0.4841

T5

6.8895

1.8245

3.4754

0.7900

P3

2.8341

1.2788

5.4376

1.1558

o1

2.9476

1.3892

2.8387

0.7101

RIGHT

 

 

2.9606

 

FP2

10.2213

1.8612

3.2732

0.4533

F4

2.7824

1.4916

2.6367

0.4855

F8

4.6843

1.1717

2.1868

0.3203

C4

1.1862

0.9137

2.5921

0.3839

T4

3.0154

1.1311

3.0539

0.4192

P4

4.7050

1.2776

4.5788

1.1151

T6

3.0017

1.6672

3.6897

0.7847

o2

3.1520

1.5393

3.0392

0.7455

CENTER

 

 

3.1313

 

FZ

2.3168

1.6558

2.6433

0.3970

Cz

2.4833

1.5420

2.2667

0.4005

P2

2.1524

1.6945

5.4213

0.9632

 

 

3.4438

 

The table 5.4 shows the values of delta(δ),Theta(θ),Alpha(α),and Beta(β) frequency power band during happy mode. The Electrodes are divided according to the brain region as left hemisphere, right hemisphere and center hemisphere.

Table 5.5 Region wise EEG data of different electrodes in Sad mode activity

Electrodes

Sad Song Mode

LEFT

Delta

Theta

Alpha

Beta

FP1

6.8488

2.3745

4.0893

0.4701

F7

2.8854

1.3033

2.2199

0.3463

F3

2.5957

1.4811

2.2003

0.4522

T3

1.9962

1.3759

3.8438

0.5386

C3

2.0897

1.4278

4.2067

0.5779

T5

13.9355

3.6921

4.3391

0.9913

P3

3.6525

1.7633

5.7897

1.0733

o1

8.4622

2.7225

3.8907

0.6942

RIGHT

 

 

3.8224

 

FP2

7.4509

2.8436

4.2188

0.4663

F4

3.7121

2.4572

3.1214

0.5561

F8

3.7021

1.6354

2.9349

0.3497

C4

1.3195

1.2878

4.2112

0.4067

T4

4.3132

1.7496

4.8424

0.4693

P4

3.2224

1.8930

6.3022

1.0117

T6

3.9607

2.2193

4.4570

0.8326

o2

3.1716

2.1239

4.4192

0.8603

CENTER

 

 

4.3134

 

FZ

2.6039

2.1818

3.6193

0.4996

Cz

2.7276

1.9047

3.7733

0.5430

P2

2.7929

2.3932

7.9014

1.1526

 

 

5.0980

 

The table 5.5 shows the values of delta(δ),Theta(θ),Alpha(α),and Beta(β) frequency power band during sad mode. The Electrodes are divided according to the brain region as left hemisphere, right hemisphere and center hemisphere.

Table 5.6 Region wise EEG data of different electrodes in National mode activity

Electrodes

National Song Mode

LEFT

Delta

Theta

Alpha

Beta

FP1

12.5268

2.0657

2.2682

0.5267

F7

1.8362

0.8874

1.2905

0.3564

F3

1.8036

1.2295

1.4943

0.4186

T3

2.3311

0.9182

2.4564

0.4972

C3

1.8764

1.1105

2.9404

0.5829

T5

4.6795

1.7324

4.0714

1.0280

P3

4.0987

1.4637

5.6812

1.2107

o1

4.0082

1.4732

2.3568

0.6933

RIGHT

 

 

2.8199

 

FP2

11.3700

2.0293

2.5787

0.4920

F4

2.6649

1.7014

2.4232

0.4728

F8

2.1568

1.2292

1.7529

0.3112

C4

1.6686

1.2137

2.2411

0.4420

T4

3.0443

1.3788

2.4551

0.4814

P4

4.5466

1.6400

4.0989

1.5487

T6

3.3120

1.7126

3.5374

1.0014

o2

5.1701

1.5796

3.5564

0.9433

CENTER

 

 

2.8305

 

FZ

2.2771

1.8118

2.4476

0.4251

Cz

2.4818

1.6516

2.2875

0.4030

P2

2.7041

1.8780

4.4155

1.0116

 

 

3.0502

 

The table 5.6 shows the values of delta(δ),Theta(θ),Alpha(α),and Beta(β) frequency power band during National song mode. The Electrodes are divided according to the brain region as left hemisphere, right hemisphere and center hemisphere.

Table 5.7 Region wise EEG data of different electrodes in Romantic mode activity

Electrodes

Romantic Song Mode

LEFT

Delta

Theta

Alpha

Beta

FP1

8.1541

2.4118

3.4513

0.4882

F7

1.7904

1.0588

1.4971

0.2353

F3

1.9945

1.3439

1.6001

0.3358

T3

1.8433

1.2257

2.6929

0.3938

C3

1.6755

1.2333

3.1853

0.4563

T5

5.8984

2.2864

3.7480

0.6920

P3

3.1664

1.5470

5.6657

1.1742

o1

3.8882

1.9539

3.4141

0.6318

RIGHT

 

 

3.1568

 

FP2

7.9630

2.5404

4.0538

0.4926

F4

4.2841

2.7516

3.0832

0.5884

F8

3.0636

1.5471

2.0376

0.3308

C4

1.8901

1.4714

2.8493

0.3962

T4

2.9178

1.6716

2.7130

0.4174

P4

3.5089

1.9383

4.9766

1.1807

T6

2.6983

2.4114

3.7837

0.7562

o2

3.1482

2.2078

3.8096

0.7533

CENTER

 

 

3.4134

 

FZ

2.4872

2.1259

2.5628

0.4255

Cz

2.3936

1.7722

2.1483

0.3613

P2

2.3334

2.1138

5.8971

1.0257

 

 

3.5361

 

The above tables shows the values of delta(δ),Theta(θ),Alpha(α),and Beta(β) frequency power band during Romantic mode. The Electrodes are divided according to the brain region as left hemisphere, right hemisphere and center hemisphere.

Table 5.8 Region wise mean EEG data of different electrodes in different mode activity

Modes

LEFT

RIGHT

CENTER

Relax Song Mode

4.7639

4.8856

5.1574

Happy Song Mode

2.9606

3.1313

3.4438

Sad Song Mode

3.8222

4.3134

5.0980

National Song Mode

2.8199

2.8305

3.0522

Romantic Song Mode

3.1568

3.4134

3.5361

Table 5.8 denotes the mean values of alpha rhythms in left, right and center regions of brain for different moods. As we know that alpha rhythm is inversely proportional to the brain activity that is if alpha rhythm is more then it indicates the less activity in brain and if it is less then it indicates the more activity in brain. From table it is cleared that subject has performed more activity in brain in Happy and National Song mode as compared to sad and Romantic Song mode. Also the alpha value of National Song mode is much lesser as compared to alpha value of other moods, so subjects generates more activity in brain or in more alert state in National Song Mode. The same thing is depicted in following graph.

Figure 5.5 Graph of Mean EEG data in different Brain Regions

Table 5.9 Distance Matrix of Mean Values of EEG data in Right Region

Relax

Happy

Sad

National

Romantic

Relax

0.0000

1.7543

0.5722

2.0551

1.4723

Happy

1.7543

0.0000

1.1821

0.3009

0.2820

Sad

0.5722

1.1821

0.0000

1.4829

0.9000

National

2.0551

0.3009

1.4829

0.0000

0.5829

Romantic

1.4723

0.2820

0.9000

0.5829

0.0000

Table 5.9 gives the distance matrix of mean values of alpha rhythms in right region of brain. From distance matrix it is cleared that sad song mode is closer to relax song mod1e and the distance between relax mode and national song mode is more. Thus we say that the subject is more relaxed in sad song mode and more alert in national song mode.

Table 5.10 Distance Matrix of Mean Values of EEG data in Left Region

Relax

Happy

Sad

National

Romantic

Relax

0.0000

1.8033

0.9415

1.9440

1.6071

Happy

1.8033

0.0000

0.8618

0.1407

0.1962

Sad

0.9415

0.8618

0.0000

1.0025

0.6656

National

1.9440

0.1407

1.0025

0.0000

0.3369

Romantic

1.6071

0.1962

0.6656

0.3369

0.0000

Table 5.10 gives the distance matrix of mean values of alpha rhythms in left region of brain. From distance matrix it is cleared that sad song mode is closer to relax song mode and the distance between relax mode and national song mode is more. Thus we say that the subject is more relaxed in sad song mode and more alert in national song mode.

Table 5.11 Distance Matrix of Mean Values of EEG data in Center Region

Relax

Happy

Sad

National

Romantic

Relax

0.0000

1.7136

0.0593

2.1071

1.6213

Happy

1.7136

0.0000

1.6543

0.3936

0.0923

Sad

0.0593

1.6543

0.0000

2.0478

1.5620

National

2.1071

0.3936

2.0478

0.0000

0.4858

Romantic

1.6213

0.0923

1.5620

0.4858

0.0000

Table 5.11 gives the distance matrix of mean values of alpha rhythms in center region of brain. Here we also observe the same behavior.

Table 5.12 Distance Matrix of Mean Values of EEG data in Overall Brain Region

Relax

Happy

Sad

National

Romantic

Relax

0.0000

1.7571

0.5244

2.0354

1.5669

Happy

1.7571

0.0000

1.2327

0.2784

0.1902

Sad

0.5244

1.2327

0.0000

1.5111

1.0425

National

2.0354

0.2784

1.5111

0.0000

0.4685

Romantic

1.5669

0.1902

1.0425

0.4685

0.0000

Table 5.12 gives the distance matrix of mean values of alpha rhythms in all regions of brain. Here we also observe the same behavior.

Table 5.13 Alpha Power EEG data of Different Electrodes in Left Hemisphere

Relax

Happy

Sad

National

Romantic

F7

2.4596

1.4383

2.2199

1.2905

1.4971

F3

2.8733

1.5347

2.2003

1.4943

1.6001

T3

3.9928

2.6366

3.8438

2.4564

2.6929

C3

4.4004

3.3451

4.2067

2.9404

3.1853

T5

6.1443

3.4754

4.3391

4.0714

3.7480

P3

8.5043

5.4376

5.7897

5.6812

5.6657

Figure 5.6 Graph of alpha power EEG data in left Brain Region.

From table 5.13 or Graph it is cleared that alpha values of electrodes F7,F3,T3,C3 follows the same behavior for left region of brain.

Table 5.14 Alpha Power EEG data of Different Electrodes in Right Hemisphere

Relax

Happy

Sad

National

F4

4.0261

2.6367

3.1214

2.4232

F8

2.9428

2.1868

2.9349

1.7529

C4

3.4426

2.5921

4.2112

2.2411

T4

3.8801

3.0539

4.8424

2.4551

P4

7.7845

4.5788

6.3022

4.0989

T6

6.0259

3.6897

4.4570

3.5374

Figure 5.7 Graph of alpha power EEG data in Right Brain Region.

From table 5.14 or Graph it is cleared that alpha values of electrodes F4,F8,C4,T4,P4,T6 follows the same behavior for right region of brain. The analysis of remaining subjects is given into appendix.

Table 5.15 Alpha Power EEG data of all subjects in Left Hemisphere

Subject

Relax

Happy

Sad

National

Romantic

Subject1

4.7639

2.9606

3.8224

2.8199

3.1568

Subject2

12.3484

9.9668

10.5358

11.8954

9.7437

Subject3

1.8166

1.0684

1.4997

1.5568

2.1549

Subject4

15.1802

20.1619

19.4446

17.8786

20.1355

Subject5

7.8230

3.6989

4.2286

4.2470

2.8679

Subject6

0.4193

0.5312

0.6161

0.4097

0.5442

Subject7

4.3006

1.1209

2.6453

0.9470

1.4890

Subject8

1.6894

0.8600

0.7138

0.8639

0.7393

Subject9

2.2558

1.6481

2.0363

1.5901

1.8427

Subject10

2.9950

0.9905

1.6796

0.9055

1.1142

Average

5.3592

4.3007

4.7222

4.3114

4.3788

Table 5.15 shows the mean values of alpha power of different electrodes of all subjects in left hemisphere region. The table contains the mean values of alpha power of different relax mode, Happy Mode, Sad Mode, National Mode and Romantic mode. We also calculate the average values for all subjects. From table it is clear that the alpha value for relax mode is more this means that less activity in brain for relax mode. It is also observed that we are less alert in sad mode as compared to Happy, National and Romantic mode. So it is possible to make clear distinction between the different activities in left hemisphere.

Table 5.16 Distance Matrix of Alpha Power EEG data of all subject in Left Hemisphere

Relax

Happy

Sad

National

Romantic

Relax

0

1.0584

0.6370

1.0478

0.9804

Happy

1.0584

0

0.4214

0.0106

0.0780

Sad

0.6370

0.4214

0

0.4108

0.3433

National

1.0478

0.0106

0.4108

0

0.06743

Romantic

0.9804

0.0780

0.3433

0.06743

0

Table 5.16 shows the distance matrix for mean values of alpha power of different electrodes of all subjects in left hemisphere region. From distance matrix we observe that the value of sad mode is closer to relax mode that is less activity. It is also possible to distinguish the activity (sad , Happy) (Sad, National) and ( Sad, Romantic) and the distance is >0.2. The values of Happy, National and Romantic are little close to each other. That is natural because the National Mode and Romantic mode always corresponds to Happy Mode. The person experiences the happy emotions in National and Romantic mode. Thus it is possible to distinguish all the activities.

Table 5.17 Alpha Power EEG data of all subjects in Right Hemisphere

Subject

Relax

Happy

Sad

National

Romantic

Subject1

4.8856

3.1313

4.3134

2.8305

3.4134

Subject2

18.9608

16.8311

17.2178

18.5439

17.6866

Subject3

1.4728

0.9195

1.2373

1.2241

1.7196

Subject4

17.1958

23.2027

20.0657

19.5645

22.3303

Subject5

5.5092

2.9896

3.0076

2.8405

2.2786

Subject6

0.4458

0.5585

0.6368

0.3945

0.6059

Subject7

6.9192

1.3286

3.1499

1.0754

1.6890

Subject8

7.9127

6.9945

7.0898

6.6390

7.1033

Subject9

3.7667

1.8203

3.8900

1.6554

2.4368

Subject10

5.8397

4.4074

5.4899

4.1472

4.7701

Average

7.2908

6.2184

6.6098

5.8915

6.4034

Table 5.17 shows the mean values of alpha power of different electrodes of all subjects in right hemisphere region. The table contains the mean values of alpha power of different relax mode, Happy Mode, Sad Mode, National Mode and Romantic mode. We also calculate the average values for all subjects. From table it is clear that the alpha value for relax mode is more, this means that less activity in

brain for relax mode. It is also observed that we are less alert in sad mode as compared to Happy, National and Romantic mode. So it is possible to make clear distinction between the different activities in right hemisphere.

Table 5.18 Distance Matrix of Alpha Power EEG data of all subject in Right Hemisphere

Relax

Happy

Sad

National

Romantic

Relax

0.0000

1.0725

0.6810

1.3993

0.8874

Happy

1.0724

0.0000

0.3914

0.3268

0.1850

Sad

0.6810

0.3914

0.0000

0.7183

0.2064

National

1.3993

0.3268

0.7183

0.0000

0.5118

Romantic

0.8874

0.1850

0.2064

0.5118

0.0000

The table 5.18 shows the distance matrix for mean values of alpha power of different electrodes of all subjects in left hemisphere region. From distance matrix we observe that the value of sad mode is closer to relax mode that is less activity. It is also possible to distinguish the activity (sad , Happy) (Sad, National) and ( Sad, Romantic) and the distance is >0.2.Also it is possible to distinguish the between

( Happy, National) (Happy, Romantic) and (National, Romantic mode) which is not possible in Left Hemisphere. This proves that the emotions are more separable in right hemisphere as compared to left hemisphere.

Table 5.19 Comparative EEG data of all subjects in Left and Right Hemisphere.

Region

Relax

Happy

Sad

National

Romantic

LEFT

5.3592

4.3007

4.7222

4.3113

4.3788

RIGHT

7.2908

6.2183

6.6098

5.8915

6.4033

% Dominance

24.84

44.58

39.97

36.65

46.24

Figure 5.8 Graph of Comparative EEG data of all subjects in Left and Right Hemisphere.

Table 5.19 and Graph 5.8 show the comparative EEG data of all subjects in left hemisphere and Right hemisphere. From the data it is cleared that the emotions are right dominant. The dominance is less for relax activity and it is maximum for romantic mode.