Fig. 2From: Electroencephalographic features in pediatric patients with moyamoya disease in ChinaEEG findings before and after hyperventilation in a 10-year-old boy. a Before hyperventilation. b At the end of hyperventilation. c 5 min after hyperventilation. Slow activity was recorded in the left hemisphere during hyperventilation. The slow activity was enlarged and the “re-build up” phenomenon was observed over bilateral hemispheres after hyperventilationBack to article page