PMC6501490_01
The EEG of patient K. (Case 1). Regional deceleration in central frontal parts, mostly on the left, triphasic waves on leads F4-A2, S4-A2, beta-delta brushes on lead S3-A1; state of consciousness: stunned.
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The TPWs were observed in the leads F4-A2, C4-A2, and BDP in C3-A1 (Figure 1).
PMC6501490_02
The EEG of patient S. (Case 2), made 1 day prior to commencement of generalized tonic-clonic seizures; beta-delta brushes on leads F3-A1, S3-A1, R3-A1, and O1-A1 (arrows); state of consciousness: stunned.
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On the EEG we observed polyrhythmic SW activity without epileptiform phenomena, and also BDP in leads F3-A1, C3-A1, P3-A1, O1-A1 (Figure 2).
The EEG of patient S. (Case 2). Normalization of the EEG; inter-paroxysmal period, state of consciousness: lucid.
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S. was discharged from the department on 11 June 2014 in a satisfactory condition (had put on a makeup herself); EEG: normal variant (Figure 3) and MMSE test: 30 points.
PMC6501490_03
Head MRI of Patient Z. (Case 3). An irregular intensification of signal in left temporal lobe in regime FLAIR (white arrows).
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When the MRI of the head was performed in the FLAIR mode, a lesion in the medial parts of the left temporal lobe was detected (Figure 4).
The EEG of patient Z, 30 March 2018 (Case 3). Periodic regional decelerations in the left rear frontal (anterior-temporal) lobe (leads Fp1-F7 (arrows)). Consciousness level: altered, eternally observed as passive awakening.
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The EEG (30 March 2013) demonstrated a periodic regional slowdown in the leads Fp1-F7 (Figure 5).
EEG of patient Z., 30 March 2018 (Case 3). Regional beta-delta pattern in right rear frontal (anterior-temporal) lobe (leads Fp2-F8 ((arrow)).
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At the same time, in the contralateral area (leads Fp2-F8), a regional BDP (beta-delta brush) was recorded (Figure 6).
EEG of patient Z., 6 April 2018 (Case 3). Regression of epileptiform patterns after treatment with valproic acid. State of consciousness: lucid.
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April 2018, the marked changes regressed (Figure 7). After treatment with GC (methylprednisolone) IV and plasmapheresis, the patient's well-being improved, the symptoms completely regressed, and the attacks did not recur.
PMC6501490_04