Skip to main content

Table 1 Comparison of coherence characteristics in sensor space and source space

From: Coherence a measure of the brain networks: past and present

Characteristics

Coherence in Sensor space

Coherence in Source Space

Frequency components

Yes

Yes

Inverse solution

No

Yes

Localization

Inferred by indicating which electrode is active and drawing lines

Specific to the local brain region that is active and indicated by colored pixels

Raw MEG/EEG recordings

Yes

No, Data is processed first

Field spread effects on results

Yes, the current flowing across the scalp is detected by many sensors simultaneously, which leads to uncertainty in the location of the brain activity.

No, since the data is first imaged into the brain. Then the coherence is calculated, provides more accurate information on which brain regions are actual coherent.