Easycap 10%-based electrode layouts.docx

Easycap Electrode Layouts based on 10%-System Easycaps can be built with any electrode layout. This file lists electrode layouts based on the 10%-System, including some for special investigations at the end. The majority of EEG data worldwide are acquired from 10%-based electrode positions. Thus new data can be compared to a huge data base and can be published without further explanations. However, the electrodes can be picked only from a limited number of positions (next page). If it is preferable to distribute any given number of electrodes on any desired area in a strictly equidistant fashion, this is done by triangulation. Please find these “equidistant layouts” in Easycap Equidistant Layouts.pdf

EASYCAP EEG Recording Caps and Related Products

EASYCAP GmbH Tel +49 8153 88702-00 Steingrabenstrasse 14 Fax +49 8153 88702-10 82211 Herrsching www.easycap.de Germany info@easycap.de Delivery Address: Am Anger 5 ▪ 82237 Woerthsee-Etterschlag ▪ GERMANY

Layout M1-ext shows all 10% positions that can be realized in an EasyCap M1-ext

Fp1

Fp2

F3

Fz

F4

F8

T7

C3

C4

Cz

T8

P7

P3

Pz

P4 P8

O1

O2

FCz

TP9

TP10

Oz

AFz

F7

Fpz

AF7 AF3

AF4

AF8 F9

F5 F1

F2

F6

F10

FT9

FT7 FC5

FC3

FC1

FC2

FC4

FC6

FT8

FT10

C5

C1

C2

C6

TP7

CP5

CP3

CP1

CPz

CP2

CP4

CP6 TP8

P9

P5

P1

P2 P6

P10

PO9

PO7

PO3

POz

PO4 PO8

PO10

O9 Iz

O10

T7

P7

T8

P8

F11

F12

FT11

FT12

TP11

TP12

PO11

PO12

P11

P12

I11

I12 IIz

Differences between the 10%-Systems of the American Electroencephalographic Society and the Deutsche EEG-Gesellschaft This graph shows the American electrode positions and their names on the left side, the German ones on the right side. The differing positions are marked in black, the differing names are in bold print. Note: Meanwhile the Deutsche EEG Gesellschaft has adopted the American nomenclature, which is now the only correct system for publications. Yet, due to its wide spreading, this comparison might stay useful. The grey electrode positions designate some further useful placements possible in an EasyCap:

- T1/T2 are situated above the tip of temporal lobe, 2/3 the distance between canthus and preauricular point and from there 1 cm down.

- L-PR/ R-PR designate the preauricular points. The exact 10%-positions T9/T10 would come to lie inside the ear.

- - A1/A2 stand for the mastoids. These can be either buttoned into the cap or, through the ear slit of the cap, placed right onto the skin.

A1

T6

T6.8

O2

T4.6

T4 C4 C2 C6

PO2

P2 P4

P6

CP4 CP2

CP6

F8

FpF6

Fp2

T2.4

FpF2

F2 F4

F6

FC4 FC2

FC6

Cz

Iz

Oz

Pz

POz

CPz

TP9

P9

PO9

O9

P7

PO7

O1

TP7

T7 C3 C1 C5

PO3

P1 P3

P5

CP3 CP1

CP5

Fpz

Fz

AFz

FCz

FT9

F9

F7

AF7

Fp1

FT7

AF3

F1 F3

F5

FC3 FC1

FC5

FpF4

PO4

L-PR R-PR

A2

T2 T1

21 Channels: Classic 10/20-System: 19 electrodes plus TP9/TP10 (near mastoids) plus Ref plus Gnd

M25

Fp1 1

Fp2 2

F7 11 F3

3 Fz 17

F4 4

F8 12

T7 13

C3 5

C4 6

Cz 18

T8 14

P7 15

P3 7

Pz 19

P4 8 P8

16

O1 9

O2 10

AFz Gnd

FCz Ref

TP9 20

TP10 21

29 Channels: These 29 electrode positions show the best possible equidistant selection of 10%-positions within the area of the 10/20-system. M22

Fz 17

Cz 18

Fp2 2

FC2 23

F4 4

C4 6

FC6 27

F8 12

T8 14

CP2 25

CP6 29

Pz 19

P4 8 P8

16

O2 10

T7 13

C3 5

CP5 28

CP1 24

P7 15

P3 7

O1 9

Fp1 1

F7 11 F3

3

FC5 26

FC1 22

TP10 21

TP9 20

AFz Gnd

FCz Ref

30 Channels: This electrode arrangement with densely populated longitudinal rows used to be the most-spread extension of the 10/20-system in the past.. Unused channels of your amplifier can be used for EOG, ECG or other polygraphies.

M3

Fp1 Fp2

AFz

F7

F3 Fz F4

F8

FT7 FC3 FCz FC4

FT8

T7 C3 Cz C4 T8

TP9

TP7 CP3 CPz CP4

TP8

TP10

P7

P3 Pz P4

P8

O1 Oz

O2

34 Channels: Covering a larger area than M22.

M24

AFz

Fz

FCz

Cz

Fp2

FC2

F4

C4

FC6

F8

T8

CP2

CP6

Pz

P4 P8

O2

T7

C3

CP5

CP1

P7

P3

O1

Fp1

F7 F3

FC5

FC1

TP10

TP9

IZ

FT10

PO10

PO9

FT9

64 Channels: Full 10% System covering the 10/20 area

M64

Cz

Oz

Pz

POz

CPz

TP9

P7

PO7

O1

TP7

T7 C3 C1 C5

PO3

P1 P3

P5

CP3 CP1

CP5

TP10

P8

PO8

O2

TP8

T8 C4 C2 C6

PO4

P2 P4

P6

CP4 CP2

CP6

Fpz

Fz

AFz

FCz

FT9

F7

AF7

Fp1

FT7

AF3

F1 F3

F5

FC3 FC1

FC5

FT10

F8

AF8

Fp2

FT8

AF4

F2 F4

F6

FC4 FC2

FC6

74 Channels: Full 10%-System one row further down covering the area down to a line from the canthii to the Inion.

M1

Official 10%-System according to J.Clin.Neurophysiology Vol.8, No. 2, 1991: American Electroencephalographic Society Guidelines for Standard Electrode Position Nomenclature

Cz

Iz

Oz

Pz

POz

CPz

TP9

P9

PO9

O9

P7

PO7

O1

TP7

T7 C3 C1 C5

PO3

P1 P3

P5

CP3 CP1

CP5

TP10

P10

PO10

O10

P8

PO8

O2

TP8

T8 C4 C2 C6

PO4

P2 P4

P6

CP4 CP2

CP6

Fpz

Fz

AFz

FCz

FT9

F9

F7

AF7

Fp1

FT7

AF3

F1 F3

F5

FC3 FC1

FC5

FT10

F10

F8

AF8

Fp2

FT8

AF4

F2 F4

F6

FC4 FC2

FC6

128 Channels: Covering the same area as M1 in higher density

M15

Fpz

Fz

FCz

Cz

F8

F5 F3 F1 F2 F4

F6

F10 F9 AF3 AF4

F7

FT9

AFz

FC5 FC3 FC1 FC2 FC4 FC6 FT8

FT10

T7 C5 C3 C1 C2 C4 C6 T8

TP9

TP7 CP5 CP3

FT7

Oz

P7

P9

TP10

P10

CP6 CP4 CP2 CPz CP1

Fp1

AF8

PO7

Fp2

AF7

PO4 PO3

TP8

P8 P6

P4 P2 Pz P1 P3 P5

O1 O2

POz

PO10

O10

PO9

O9

Iz

PO8

TPP10h

FTT10h

PPO10h

POO10h

AFF6h AFF2h AFF1h AFF5h

AFp2 AFp1

FTT9h FTT7h FCC5h FCC3h FCC1h

FFC5h FFC7h

FFT9h

FFC1h FFC3h FFC6h FFC8h

FFC2h FFC4h

FFT10h

FTT8h FCC6h FCC4h FCC2h

TPP9h

CCP1h CCP3h CCP5h TTP7h CCP2h CCP4h CCP6h TTP8h

TPP7h CPP5h

CPP3h CPP1h

TPP8h CPP6h

CPP4h CPP2h

OI1h

POO9h

POO1 PPO9h

PPO5h PPO1h

OI2h

POO2

PPO6h PPO2h

256 Channels: Full 5% System

M50

PPO3h

PPO7

PPO9

POO3

PO1

PO2

POO4

PPO10 PO9h

POO7

POOz

POO8

PO10h

POO9

O1h

O2h

POO10

OI1

OIz

OI2

I1h

I2h

CPP3

CPP1

CPPz

CPP2 CPP4

CPP6

TPP8

TPP10

P10h

P8h

P6h

P4h

P2h

P1h

P3h

P5h P7h

P9h

PPOz

PPO4h

PPO8

TTP7

CCP5

CCP3

CCP1

CCPz

CCP2

CCP4

CCP6

TTP8

TP10h

TP8h

CP6h

CP4h

CP2h

CP1h

CP3h

CP5h TP7h

TP9h

TPP9

TPP7

CPP5

FC3h

FC1h

FC2h

FC4h

FC6h

FT8h

FTT7

FCC5

FCC3

FCC1

FCCz

FCC2

FCC4

FCC6

FTT8

T7h

C5h

C3h

C1h

C2h

C4h

C6h

T8h

F3h

F1h

F2h

F4h

F6h

F8h

F10h

FFT9

FFT7 FFC5

FFC3

FFC1

FFCz

FFT10

FFC2

FFC4

FFC6

FFT8

FT9h

FT7h FC5h

FT10h

AFp7

AFpz

AFp8

AFp4

AF2

AF1

AFp3

AFF7

AFF3 AFFz

AFF4

AFF8 F9h

F7h F5h

Fp1h

Fp2h

FCz Ref

AFz Gnd

Cz

C4

T8

TP9

CP5

CP1

CP2 CP6

TP10

P7

P3

Pz P4

P8

O1 Oz

O2

F8

F4

Fz

F3

F7

FC5 FC1

FC2

FC6

T7

C3

Fp1

Fp2

10 cm 40 cm

ECG

IO

FT8

C5

C1

C2

C6

TP7

CP3

CPz

CP4 TP8

P5

P1

P2 P6

PO7

PO3

POz PO4

PO8

AF4

F5 F1

F2

F6

AF8

FT7 FC3

FC4

FPz

AF7 AF3

TPP8h

TPP10h

P10

P9

PPO9h

PPO5h

PPO1h

PPO2h PPO6h

PPO10h

PO9

POO9h

POO1

POO2

POO10h PO10

I2

OI2h

OI1h

I1

Iz

FCC1h

FCC2h

FCC4h

FCC6h

FTT8h

TTP7h

CCP5h

CCP3h

CCP1h

CCP2h

CCP4h

CCP6h TTP8h

TPP9h

TPP7h

CPP5h

CPP3h

CPP1h

CPP2h

CPP4h

CPP6h

F10

AFF6h AFF2h

AFF1h

AFF5h

F9

FFT9h

FT9

FFT7h FFC5h

FFC3h

FFC1h

FFC2h

FFC4h

FFC6h

FFT8h

FFT10h

FT10

FTT7h

FCC5h

FCC3h

AFp2

AFp1

BESA EEG33: Dipole Analysis from 32 channels as recommended by BESA.

EEG33

LLName Cap Position as defined by 10%-System Ideal, anatomically defined, Position

F11/F12 20% inferior to F7/F8 On the edge of the cheek bone (distal plane of os zygomaticum)

A1/A2 In front of the ear slit, 1 cm lower than T9/T10

1 cm inferior of the preauricular point

P11/P12 20% inferior to P7/P8 On the edge of the skull, Inferior to P7/P8

Language Research from 28 Channels: The black electrodes are placed anterior, above and posterior to Wernicke-Area and defined as follows: LT/RT (Left/Right-Temporal): 33% down from Cz, where 100% is the distance from the left to right auditory meati via Cz. LTP/RTP (Left/Right-Temporo-Parietal): 30% down from Cz and 13% of the distance Nasion-Inion to posterior. LP/RP (Left/Right-Parietal): 50% between LTP and PO7, respectively RTP und PO8.

M17