Broughton R, Hasan J
Ottawa General Hospital, Canada.
J Clin Neurophysiol. 1995 Jul;12(4):372-86.
The topographic EEG features of drowsiness and sleep onset are much less well documented than are their temporal aspects. A commercial topographical mapping system was used to assess the main EEG features employing all 19 international 10/20 system electrode sites referenced to linked ears during wakefulness, stages 1A and 1B drowsiness, stage 2 sleep, and sleep onset REM periods in 19 patients. All patients had been referred for a diagnostic EEG or a Multiple Sleep Latency Test and had essentially normal EEGs. Anterior alpha of drowsiness seldom represented frontal spread of the occipital alpha rhythm but usually was a distinct activity of apparent separate origin. Theta activities of drowsiness were maximum at CZ and FZ. Vertex sharp waves and sawtooth waves of rapid eye movement (REM) sleep had similar fields maximum at the midline with a steep decrease laterally. Isolated anterior mainly negative waves were identified. Sleep spindles were usually maximal in fronto central, occasionally centro parietal, or even parietal areas.
与困倦和睡眠开始的时间特征相比，其地形脑电图特征的记录要少得多。使用一种商业地形映射系统，对19名患者在清醒、1A和1B期困倦、2期睡眠以及睡眠开始快速眼动期，采用所有19个国际10/20系统电极部位（参考双耳连接）来评估主要脑电图特征。所有患者均因诊断性脑电图或多次睡眠潜伏期测试而就诊，脑电图基本正常。困倦时的前部阿尔法波很少代表枕部阿尔法节律的额叶扩散，而通常是明显独立起源的独特活动。困倦时的θ波在CZ和FZ处最大。快速眼动（REM）睡眠的顶点尖波和锯齿波在中线处具有相似的最大场，向外侧急剧下降。识别出孤立的主要为前部的负波。睡眠纺锤波通常在额中央最大，偶尔在中央顶叶，甚至顶叶区域最大。
