Figure 2
RTTBD correlating with a hippocampal seizure. Simultaneous scalp (black) and hippocampal (pink) EEG recordings in a patient with left mesial TLE during sleep. The RTTBD (5-6 Hz) with flat-toped or notched appearance was present in the left temporal lobe on scalp EEG and correlated with the middle part of a left hippocampal seizure recorded on a single depth electrode placed along the longitudinal axis of the left hippocampus without lateral temporal bone defect. On scalp EEG, the RTTBD was more prominent over the subtemporal region at electrodes F9 and T9, compared to the lateral temporal region at electrodes F7 and T7. LHD: left hippocampus depth electrode. Filters: LF=2 Hz; HF=30 Hz.