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. 2013 May 14;4:56. doi: 10.3389/fneur.2013.00056

Figure 3.

Figure 3

Subject 3. (A) Bipolar AP EEG and 15 virtual sensor channels showing onset of burst in unaveraged signals filtered in bandwidth 3–70 Hz, digitized at 600 Hz. A spike is seen at V1, but not well seen at other VS locations in this bandwidth (B) The same epileptiform discharge but shown in bandwidth 20–70 Hz. Earliest onset at VS location V10 left parietal followed by left posterior frontal V9 (43 ms), and right parietal V4 (43 ms), then right posterior frontal lobe V1 (173 ms). (C) Subject’s sagittal MRI scan showing VS location V10 in left parietal at crosshairs and red #1. (D) Subject’s axial MRI scan showing location of earliest onset at red #1(V10), then next two onsets at blue #2 (V9 and V4), and then onset at green #3 (V1). Red arrows indicate relative timing of peaks. Green circle indicates location of left parietal MRI lesion. (E) 3D reconstruction of subject’s MRI scan. Purple dots indicate the location of spikes on subdural grid electrodes preceding ictal fast activity. Posterior to red line indicates resection plan.