Lange B, Dumermuth G, Lehmann D, Meier C A
EEG EMG Z Elektroenzephalogr Elektromyogr Verwandte Geb. 1984 Mar;15(1):38-44.
We recorded all-night sleep EEG's of six healthy male volunteers (age 23 to 29 years) from F3, F4, P3, P4, 01, 02, T3, T4 to Cz as reference electrode. Power and coherence spectra were calculated for ten frequency bands from 0-30 cps. We examined their changes through the different cycles of all sleep stages. In general there was a decrease in power as well as in coherence from the 1st to the 4th cycle of the different sleep stages with some variations depending on frequency and derivation. The highest power was most often in the 1st cycle in stages REM, 2, 3 and 4, whereas in stage 1 it was most often in the 2nd cycle. The trends in power from the 1st to the 4th cycle were similar for stages REM and 2 with a power decrease from the 1st to the 2nd cycle. In stage 1 there was most often a power increase between these two cycles. Coherence maxima were for stages REM, 1, 2 and 3 most often in the 1st cycle, for stage 4 most often in the 2nd cycle. The coherence trends were similar for stages 1 and 2 with a decrease most often from the 1st to the 2nd cycle. In stage REM the decline was more constantly found from the 2nd to the 3rd cycle. The power trends were more consistent than the coherence trends. We found more often similar power changes from the 1st to the 4th cycle of a specific sleep stage than similar coherence changes.
我们记录了6名健康男性志愿者（年龄23至29岁）整夜的睡眠脑电图，电极位置为F3、F4、P3、P4、O1、O2、T3、T4，以Cz作为参考电极。计算了0至30赫兹十个频段的功率谱和相干谱。我们研究了它们在所有睡眠阶段不同周期中的变化。一般来说，从不同睡眠阶段的第1周期到第4周期，功率和相干性都会下降，但因频率和导联不同会有一些变化。快速眼动（REM）期、第2、3和4期的最高功率大多出现在第1周期，而第1期的最高功率大多出现在第2周期。REM期和第2期从第1周期到第4周期的功率趋势相似，即从第1周期到第2周期功率下降。在第1期，这两个周期之间大多出现功率增加。REM期、第1、2和3期的相干性最大值大多出现在第1周期，第4期的相干性最大值大多出现在第2周期。第1期和第2期的相干性趋势相似，大多从第1周期到第2周期下降。在REM期，从第2周期到第3周期下降更为持续。功率趋势比相干性趋势更一致。我们发现，特定睡眠阶段从第1周期到第4周期的功率变化比相干性变化更常相似。
