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Figure 1

From: Scalp HFO rates decrease after successful epilepsy surgery and are not impacted by the skull defect resulting from craniotomy

Figure 1

Scalp EEG recording setup following epilepsy surgery. Position of the 10–20 system EEG electrodes following epilepsy surgery in relation to the skull defect resulting from craniotomy and the resected area. For illustrative purposes, we consider that the presurgically defined HFO area overlaps with the resected area depicted here. Electrodes A, B, and C are all located ipsilateral to the craniotomy. Electrode A is located > 1 cm from the skull defect, the HFO area, and the resection area, and thus does not correspond to a channel of interest. Electrode B is located within the HFO area and is thus involved in HFO area channels. Electrode C is located outside the HFO and the resection area but close to the skull defect (≤ 1 cm) and is thus involved in skull defect channels.

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