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Journey2PhD

EEG electrode placement for mu wave, Y01-M05-D19

So, 19.01.2014
Year 1, Month 5, Day 19
(4 bulan dan 19 hari telah berlalu)

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EEG electrode placement for mu wave.

From Gerwin Schalk, in BCI2000 forum (if 8 channels):
– left:   F3, C3, T7
– right:  F4, C4, T8
– middle: Cz, Pz
See
http://ift.tt/1aBId5e

Easy Cap, in lab.
– left:   F3, C3, P3, O1, TP9
– right:  F4, C4, P4, O2, TP10
– middle: FPz, AFz, Fz, FCz, Cz, Pz
The configuration of 16 electrodes is from Markus Kroesen’s Bachelor Thesis, 2013,
“Vergleich verschiedener EEG-Verstärker zur Steuerung von Brain-Computer Interfaces”
http://ift.tt/1ahIXSG
http://ift.tt/1aBId5g
http://ift.tt/1ahIXSK

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Valbuena 2010 motor imagery cap:
left:  FC3, C5, C3, C1, CP3
right: Fc4, C6, C4, C2, CP4
middle: AFz, Cz
reference: right ear lobe / or left?
ground (GND): AFz
Laplacian spatial filter, with C3 and C4 are central, others are surrounding

Similarity between Diana and Easy Cap:
– left:  C3
– right: C4
– middle: AFz, Cz

Bibliography:
1. Valbuena, 2010, “Selection of Reactive Frequency Bands during Motor Imagery”. BRAINROBOT, Ch. 9, pp 109. Shaker Verlag.
note:
– inconsistent reference placement but Laplacian spatial filter solve it.
– good idea of signal processing of ERD/ERS classification
– read other papers from citation to get idea of motor imagery, signal processing and electrode placement

2. G. Pfurtscheller, C. Brunner, A. Schlögl, F.L. da Silva, 2006, “Mu rhythm (de)synchronization and EEG sigle-trial classification of different motor imagery tasks”. NeuroImage, vol. 31, pp. 153-159.
note:
– Diana Valbuena got idea of EEG electrode placement from this paper

3. B. Hjorth, 1975, “An online transformation of EEG scalp potentials into orthogonal source derivations”. Electroencephalography and Clinical Neurophysiology, vol. 39, pp. 526-530.
note:
– Diana Valbuena got idea of Laplacian spatial filter from this paper

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It seems that the important electrode positions to get mu-wave are C3, Cz, C4.
Pz can also be needed to get P300 signals.

Electrodes from frontal lobe: F3, F4, FC3, and FC4.
Electrode from temporal lobe: T7, T8
They could be needed to get redundant information.

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standard EEG 10-20 system:
http://ift.tt/1aBId5k
http://ift.tt/1ahIVdv
http://ift.tt/1aBIepL

My previous experiment on steady-state evoked potential (SSVEP):
Condro, 2010, “Improvement of Response Times in SSVEP-based Brain-Computer Interface”. Master Thesis. University of Bremen.
http://ift.tt/1ahIY8Y
http://ift.tt/1aBId5m
http://ift.tt/1ahIVdw
http://ift.tt/1aBIepP

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My other thought about electrode position for P300
http://ift.tt/1ahIVdy
http://ift.tt/1aBIepR
http://ift.tt/1ahIY90
http://ift.tt/1aBId5o

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Mu waves (8-13 Hz) are important to see event related potentials in motor imagery. I need to measure these signals for my research. I am still thinking about the electrode position for my experiments. I have 14 electrodes and I want to put them in the most optimal position, so that I can get signals related to P300 and motor imagery.

Bremen, 19 Januari 2014

iscab.saptocondro

via Darah Juang Doktoral http://ift.tt/1ahIVdA

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About iscab.saptocondro

Ignatius Sapto Condro Atmawan Bisawarna (iscab.saptocondro) Blogger, Engineer. I was born in Bandung, Indonesia, and has spent 25 years of my life there. I worked in Semarang, Indonesia, and then continued to study in Bremen, Germany. I work in Germany until I find myself. Well, now, I am a PhD student in Oldenburg, Lower Saxony or Niedersachsen, Germany.

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  1. Pingback: EEG electrode placement for mu wave, Y01-M11-D19 | Darah Juang, Dr. Dro! - August 19, 2014

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