The polyphasic spike phenomenon.
D000328:Adult; D002540:Cerebral Cortex / Q000503:physiopathology*; D002547:Cerebral Palsy / Q000503:physiopathology; D002648:Child; D002675:Child, Preschool; D004569:Electroencephalography; D004827:Epilepsy / Q000503:physiopathology*; D005625:Frontal Lobe / Q000503:physiopathology; D006801:Humans