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Questions tagged [meg]

Used for questions about MEG practical use and underlying theory.

2
votes
0answers
21 views

correction for multiple comparison over many ROIs

I would like to know how to correct a p value of a stiatistic when the same test was run over multiple regions of interest. The modality is MEG. So, I have 4 Regions Of Interests, and I ran the same ...
1
vote
1answer
23 views

MEG from simulated neurons

Given MEG is an approximation of neuronal spiking, are there any models that associate the spiking of simulated neurons to an MEG signal? Ideally, this would be a model with some amount of behaviour (...
1
vote
0answers
21 views

Does MEG measure the sum of neural activity or the maximum?

According to Wikipedia, neurons give a response that generates a readable MEG signal when they are firing in a relatively synchronized manner and their current carrying dendrites/axons are all aligned....
6
votes
1answer
401 views

Physiology behind EEG measurements

Many questions were asked about general procedures of Electroencephalography (EEG), which were phrased in a rather specific context. Not only were these questions hard to find, they might also be ...
8
votes
5answers
9k views

Are brain waves electromagnetic waves?

Depending upon its activity, the brain emits waves, which represent the summation of individual neurons firing. Are these waves electromagnetic waves?
5
votes
1answer
39 views

Insensitivity of MEG to inhomogeneous conductivity

Why MEG is not sensitive to inhomogeneous conductivity profile of different brain compartments (scalp,skull and brain) but EEG is sensitive to that?
5
votes
2answers
366 views

Component naming of MEG vs. EEG

My question is why we use P and N for naming positive and negative EEG component(for instance N170 or P100) but for MEG data we use M in both case, I mean M170 and M100 in this example?