4、anthoseinunhandledcontrolgroup,thereexistedadifferenceofsignificance(p<0.05),andafter4and6ittenthypoxia,theproportionskeptexistingbutthedifferencebecamemature,ittenthypoxia;theimprovementofbraininjuryfinallymakestheabnormalchangesofelectricalactivityoftheprefrontalcortexreducegradually. k