Westmoreland B F, Klass D W
Division of Clinical Neurophysiology, Mayo Clinic, Rochester, MN 55905, USA.
Electroencephalogr Clin Neurophysiol. 1997 Jan;102(1):1-4. doi: 10.1016/s0013-4694(96)96035-6.
Since 1981, when we first described a group of patients with subclinical rhythmic electrographic discharge of adults (SREDA), we have seen 108 patients with SREDA. Nineteen of these patients had unusual or atypical features of SREDA. The typical pattern consists of a non-evolving theta rhythm occurring in a widespread manner but maximal over the parietal and posterior temporal regions and lasting for a few seconds to a minute without clinical manifestations or symptoms. The unusual variants consist of predominantly delta frequencies, notched waveforms, a frontal or more focal distribution, a more prolonged duration, and presence during sleep. There was no significant difference in the patient group that had the atypical pattern compared with those with the typical pattern. Although the mechanism of the SREDA is unclear, it appears to represent a benign EEG phenomenon that has little diagnostic significance and should be distinguished from seizure discharges.
自1981年我们首次描述一组成人亚临床节律性脑电图放电（SREDA）患者以来，我们共诊治了108例SREDA患者。其中19例患者具有不寻常或非典型的SREDA特征。典型模式为一种非进行性的θ节律，广泛出现，但在顶叶和颞叶后部最为明显，持续数秒至1分钟，无临床表现或症状。不寻常的变异包括以δ频率为主、波形有切迹、额叶或更局限的分布、持续时间更长以及睡眠期间出现。具有非典型模式的患者组与具有典型模式的患者组之间无显著差异。虽然SREDA的机制尚不清楚，但它似乎是一种良性脑电图现象，诊断意义不大，应与癫痫放电相鉴别。
