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Gelastic seizures: video-EEG and scintigraphic analysis of a case with a frontal focus; review of the literature and pathophysiological hypotheses Volume 1, numéro 4, Décembre 1999


   
  

Figure 1. Interictal EEG (longitudinal): slow spikes from the right frontal lobe with maximal amplitude in F8, FT10, FP2.




   
  

Figure 2. Ictal EEG (longitudinal); 15 mm/sec, 15 µV/mm). Bursts of slow frontal spikes, beginning 5 secondes before the clinical onset, followed by a rapid right frontal discharge (arrow = clinical onset).




   
  

Figure 3. Interictal SPECT imaging: marginal hypoperfusion of the right frontal region.




   
   Figure 4. SPECT performed during seizure: hyperperfusion involving the right orbitolateral region and continuing into the temporal region.