Integrating MEG, EEG and fMRI data
Integrating MEG, EEG and fMRI data
Integrating MEG, EEG and fMRI data
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<strong>fMRI</strong> – <strong>MEG</strong> (<strong>EEG</strong>) relationship<br />
<strong>fMRI</strong><br />
Generated by oxygenated<br />
hemoglobin in the blood<br />
Functional images are<br />
directly related to<br />
structural images<br />
No source model required<br />
High spatial resolution (but<br />
depends on vascularization)<br />
Low time resolution (limited<br />
by hemodynamic response)<br />
Resolution independent of<br />
source depth<br />
<strong>MEG</strong> (<strong>EEG</strong>)<br />
Generated by intracellular<br />
currents<br />
Functional images are not<br />
directly related to<br />
structural images<br />
Imaging depends on source<br />
<strong>and</strong> head models (<strong>and</strong><br />
conductivity, for <strong>EEG</strong>)<br />
Low spatial resolution<br />
(related to source type)<br />
High time resolution (better<br />
than 1 ms)<br />
Poor resolution for deep<br />
sources
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