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Epileptic Disorders

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Subclinical focal seizures as a sign of progression in gliomas Volume 16, numéro 4, December 2014

Figure 1

Interictal recordings.

(A) Note the presence of focal slow waves, spikes, and sharp waves (arrows), localized over the left frontal area. (B) Focal slow activity with occasional sharp morphology, localized on the left frontal lobe.

Low filter: 0.5 Hz; high filter: 70 Hz; notch filter: 50 Hz. Vertical bar: 100 μV; horizontal bar: 1 second.

Figure 2

Ictal recording.

(A) Onset of the seizure, with fast rhythmic low-voltage activity arising from the left superior frontal electrode (F3). (B) Progression of the seizure. Note that the fast activity evolved into high-amplitude rhythmic spikes. The seizure lasted 90 seconds and was not associated with motor manifestations or behavioural alteration. (C) End of the seizure.

Low filter: 0.5 Hz; high filter: 70 Hz; notch filter: 50 Hz. Vertical bar: 100 μV; horizontal bar: 1 second.

Figure 3

Ictal recording.

Note the occurrence of a subclinical left frontal seizure that lasted for 70 seconds in Patient 2.

(A) Onset of the seizure. (B) and (C) Fragments of the progression phase. (D) End of the seizure.

Low filter: 0.5 Hz; high filter: 70 Hz; notch filter: 50 Hz. Vertical bar: 100 μV; horizontal bar: 1 second.