Continuous electroencephalography (cEEG) and quantitative analysis of EEG (qEEG) are used in various circumstances such as detecting seizures, identifying acute or delayed cerebral ischemia, monitoring sedative therapy, or assessing prognosis. The authors report 2 cases: (1) Case #1 was a patient with unilateral cerebral edema and uncal herniation with asymmetric cEEG and qEEG changes detected an hour before clinical examination changes were noted and (2) Case #2 was a patient with diffuse cerebral edema and trans-tentorial herniation with symmetric cEEG and qEEG changes detected an hour before clinical examination changes were noted. These cases demonstrate the ability of cEEG and qEEG in early detection of different types of cerebral herniation. qEEG can be utilized by intensive care unit (ICU) staff not trained in EEG interpretation as a surveillance method to detect cerebral herniation, which may provide an opportunity for early intervention in high-risk patients.

连续脑电图 (cEEG) 和脑电图定量分析 (qEEG) 用于各种情况，例如检测癫痫发作、识别急性或迟发性脑缺血、监测镇静剂治疗或评估预后。作者报告了 2 例：(1) 病例 #1 是一名单侧脑水肿和钩索突出的患者，在注意到临床检查变化前一小时检测到不对称 cEEG 和 qEEG 变化；(2) 病例 #2 是一名弥漫性脑水肿患者在注意到临床检查变化前一小时检测到具有对称 cEEG 和 qEEG 变化的水肿和经天幕疝。这些病例证明了 cEEG 和 qEEG 在早期发现不同类型脑疝的能力。