Integrating MEG, EEG and fMRI data
Integrating MEG, EEG and fMRI data
Integrating MEG, EEG and fMRI data
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Pyramidal neurons: only<br />
1% of these neurons (low<br />
metabolic dem<strong>and</strong>), if<br />
synchronously active<br />
produce 90% of scalp<br />
<strong>EEG</strong>/<strong>MEG</strong><br />
Some critical remarks<br />
Stellate neurons (15% of neocortical<br />
neurons): strong metabolic/rCBF dem<strong>and</strong><br />
but no scalp <strong>EEG</strong> or <strong>MEG</strong> signals (closed<br />
electromagnetic fields)<br />
Moreover, <strong>MEG</strong>/<strong>EEG</strong> <strong>and</strong> <strong>fMRI</strong> may be sensitive to different<br />
phenomena (i.e. rhythm modulations vs. regional neural<br />
activation), or be affected by different “boundary” conditions
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