关键词: 儿童良性癫疒间, 中央颞区棘波, 脑电描记术

Abstract: This study aimed to recognize the clinical characteristics and electroencephalographic features of BECT. MethodsThe clinical data of 59 patients with BECT were analyzed who were treated from July 2002 to September 2004.and the patients were treated with anticonvulsants after definite diagnosis.Among the 59 cases,28 were reexamined on EEG three and six months after treatment,and the location,the frequency and the morphology of epileptic discharges were compared before and after treatment. ResultsOf the 59 patients,age at onset of BECT was of a peak at 7~9 years.The seizure types were partial seizure(27/59 cases) and generalized partial seizure(48/59 cases);16/59 patients had these two seizure types.The seizure was associated with sleep closely,usually shortly after falling asleep(46/59 cases) or before awakening(25/59 cases).All patients presented unilateral convulsions involving mouth(542%),drooling(407%) and speech arrest(271%),and they tended to generalize tonicclonic seizures.The background activity of EEG was normal.The location of epileptic discharges was in centrotemporal area,midtemporal area and central area.During treatment,the spikes(21/28 cases) tended to spread from side to side.The focal discharges(7/28 cases) disappeared three months after treatment,but 5/7 patients were found again six months after treatment.Two patients had convulsion during videoEEG monitoring;the ictal EEG was frequent rhythmic lowvoltage spikes originating from the centrotemporal region in hemisphere,then spreading to the entire ipsilateral hemisphere and finally to the contralateral side. ConclusionBECT has two seizure types connected with sleep closely,and the type of generalized partial seizure is more common.EEG has important diagnostic value in diagnosing BECT.The centrotemporal spikes tend to vary,shift or disappear sometimes.

Key words: Centrotemporal spikes, Electroencephalogram