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16 votes
Accepted

Are brain waves electromagnetic waves?

Short answer Brain waves are not electromagnetic waves. Long answer Measured brain activity, as you already mentioned, is the result of individual neurons firing. The activity exists, in fact, of two ...
11 votes

Are brain waves electromagnetic waves?

Short answer Brainwaves are typically associated with the electroencephalogram, which is a signal mainly composed of potential differences generated in the superficial layers of the brain. Potential ...
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8 votes
Accepted

Physiology behind EEG measurements

EEG research all started with Hans Berger, who in 1929 reported that brain activity could be recorded by measuring electrical activity on the scalp. Although the notion of ‘brain waves’ that were ...
8 votes

Are brain waves electromagnetic waves?

If "brain waves" produce a time-varying electric potential as shown on the EEG, then as far as I know electromagnetic waves are present. I was taught that you cannot have a time varying electric ...
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4 votes
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MEG from simulated neurons

Techniques that measure brain activity at a distance such as EEG and MEG measure spiking activity very poorly and indirectly. Instead, these techniques primarily measure synaptic currents. Synaptic ...
  • 6,377
4 votes

Component naming of MEG vs. EEG

EEG and MEG measure two different but related signals. While EEG records the electric activity from the scalp, MEG records changes in the magnetic field induced by electric activity in the brain. ...
  • 101
2 votes

Insensitivity of MEG to inhomogeneous conductivity

MEG measures magnetic fields and EEG measures electrical potentials. One property of magnetic fields is that organic matter (scalp, skull, and brain) does not block them in any significant way. ...
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2 votes

Component naming of MEG vs. EEG

Apart from making the distinction between recording techniques (talking about N170 and you refer to ERP), here is an explanation: Naming convention refers more to neurophysiology than waveform (...
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1 vote

correction for multiple comparison over many ROIs

You have one p-values for each ROI timecourse (for the largest cluster) indicating whether your conditions are exchangeable. If you want to correct for the 4 ROIs you could use any adequate multiple ...

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