Electrodes ECoG can be placed above or below the dura mater: Left layers, from top
Description
Electrodes ECoG can be placed above or below the dura mater: Left layers, from top to bottom: the scalp, skull, dura mater, arachnoiditis, pia, bark, white solid. On the right, the signal source: EEG, ECOG, intraparenchymal ( LFP , etc.) Returning to the analogy with our stadium, the ECOG microphones are inside the stadium and closer to the crowd. Therefore, the sound will be much cleaner than the EEG microphones outside the stadium, and the ECOG will be able to distinguish the sounds of individual segments of the crowd. But this improvement costs money - requires invasive surgery. But by the standards of invasive surgery, this intervention is not so bad. As one surgeon told me, "it's relatively non-invasive to place stuffing under the dura mater. I'll have to do a hole in my head, but it's not so scary. " The local field potential (LFP) Scale : small Resolution : medium-low spatial, high temporal Invasiveness : high Let's move from surface electrode disks to microelectrodes - tiny needles, which surgeons insert into the brain.
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