Westmoreland B F, Frere R C, Klass D W
Division of Clinical Neurophysiology, Mayo Clinic and Mayo Foundation, Rochester, Minnesota 55905, USA.
J Clin Neurophysiol. 1997 Nov;14(6):495-8. doi: 10.1097/00004691-199711000-00005.
Five patients had electroencephalograms (EEGs) that showed periodic epileptiform discharges in the midline (PEDIM); other than location, this activity has the same characteristics as periodic lateralized epileptiform discharges (PLEDs). All 5 patients had acute onset of partial motor seizures involving the lower extremity. The location of the PEDIM corresponded to the seizure type and focal neurologic deficits. All 5 patients had sustained a cerebrovascular insult, either old or new, and the PEDIM and seizures suggested an origin from the watershed area between the anterior, middle, and posterior cerebral arteries, involving predominantly the parasagittal region of the cerebral hemisphere.
5例患者的脑电图（EEG）显示中线周期性癫痫样放电（PEDIM）；除位置外，这种活动与周期性一侧性癫痫样放电（PLEDs）具有相同特征。所有5例患者均急性起病，表现为累及下肢的部分运动性癫痫发作。PEDIM的位置与癫痫发作类型及局灶性神经功能缺损相对应。所有5例患者均有脑血管损伤，无论是陈旧性还是新发性，PEDIM和癫痫发作提示起源于大脑前、中、后动脉之间的分水岭区域，主要累及大脑半球的矢状旁区域。
