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Epileptic Disorders

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Functional brain connectivity in electrical status epilepticus in sleep Volume 21, numéro 1, February 2019

Figure 1

Example of ESES recording during slow-wave sleep. Note the high-amplitude (>150 microvolts) spike-and-wave discharges.

Figure 2

ESES during SWS. (A) Example of ESES during SWS. EEG absolute power is represented on the right. Colored lines represent different electrodes.Note the increased power in frequencies up to the β bandwidth. (B) Example of period during SWS without ESES. EEG absolute power is represented on the right. Compared to (A), the absolute power is primarily in the Δ bandwidth.

Figure 3

Epochs of EEG used for coherence measurement. (A) Calculation of coherence measure during spike and waves and polyspikes and waves. (B) Epochs of EEG without spikes measured for coherence. Shaded areas in pink are incorporated into the coherence measures.

Figure 4

Coherence during ESES. Marked increases in coherence were seen at most electrode pairs during ESES compared to non-ESES periods.Red lines indicate that the ESES segments had higher coherences than during the non-ESES segments during SWS.The significance values are illustrated by weight of the lines.L/R refer to the left and right side of the head.

Figure 5

Heat map of p values for coherence between selected electrode pairs. Marked increases in coherence were seen during ESES compared to non-ESES periods.

Figure 6

Coherence during SWS in children with ESES and TYP. Marked increases in coherence was seen at most electrode pairs during ESES segments in SWS compared to TYP controls. Red lines indicate that the ESES segments had higher coherences than during the SWS in the TYP controls while blue lines indicate lower coherences in the ESES segments in SWS compared to TYP controls. The significance values are illustrated by weight of the lines. L/R refer to the left and right side of the head.

Figure 7

Heat map of p values for coherence between selected electrode pairs. Marked increases in coherence were seen during ESES compared to SWS in TYP controls.

Figure 8

Coherence during spikes and inter-spike intervals in children with ESES. Increases in coherence were seen at most electrode pairs during ESES segments with spikes compared to the inter-spike interval. Red lines indicate that the spike segments had higher coherences than during the inter-spike interval. The significance values are illustrated by weight of the lines. L/R refer to the left and right side of the head.