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Myoclonic absence seizure of unknown (idiopathic) cause (EEG)

The illustrated absence occurred during hyperventilation with breath-counting (annotated), and it was terminated with somatosensory stimuli by tapping the patient’s shoulder (red arrow). (Used with permission from: Panayiotopoulos CP. A Clinical Guide to Epileptic Syndromes and Their Treatment. Revised 2nd ed. London: Springer, 2010.)