脑电图中线θ节律与临床关系

目的探讨脑电图(EEG)中线θ节律与临床的关系.方法采用日本光电4317型16导EEG仪,全部病人均加用中线电极(Fz、Cz、Pz),除做纵向描记外,还描记横联.对出现中线θ节律的患者,分析其EEG背景活动、出现次数、出现条件、持续时间、波形等,并分析其与临床的关系.结果2488例患者中,EEG中线θ节律总出现率为2.57%(64例),其中14～20岁及21～40岁组高于其他年龄组.频率以6～7Hz为主,占75%.横联出现次数最高,波形为正弦样节律,64例有中线θ节律的病人中癫共20例占31.25%.结论中线θ节律确实可见于癫病人,但并无特异性,不能作为诊断癫的客观依据.

Relationship between central theta rhythm on electroencephalography and theclinical diagnosis of epilepsy.

Objective To investigate the relationship between central theta rhythm and the clinical diagnosis of epilepsy. Methods EEGs were recorded with a 16-channel Nihon Kohder 4317(Japan) instrument. The midline electrodes were used in all of the 2488 patients. Except for the longitudinal recording, the transverse montage was recorded. For the central theta rhythm, the background activity, recording count, recording conditions, duration and pattern were analyzed. Results 2.57%(64 cases) in the 2488 patients were found to have central theta rhythms. The prevalence in the 14 ~ 20 years age group and the 21-40 years age group was higher than the other age groups. The dominant frequency of central theta rhythm was 6 ~ 7 Hz and was found in 75 % of the 64 patients. The highest recording count was presented on the transverse montage. The wave pattern of the central theta rhythm was sinusoid. 20(31.25% ) of the 64 patients with central theta rhythm were epileptics. Conclusions Central theta rhythm can be found in epileptic patients without any distinctive feature when compared with non-epileptics. The presence of central theta rhythm cannot provide an objective evidence for the diagnosis of epilepsy.