Ivanova L A
Institute of Neurology, Psychiatry and Neurosurgery, Medical Academy, Sofia (Bulgaria).
Electroencephalogr Clin Neurophysiol. 1988 Oct;70(4):363-5. doi: 10.1016/0013-4694(88)90055-7.
EEG power spectra in fronto-central, centro-parietal, parieto-occipital and occipito-temporal regions were analysed during an orthostatic test performed on 60 normal volunteers aged 22-82 years. Resting EEGs were taken lying down and compared with the records made immediately after tilting and at 15 min. Two age groups were formed, each comprising 30 subjects, mean age 38.3 +/- 8.8 and 65.4 +/- 8.1 years, respectively. No differences were found between the 2 groups in the baseline power spectra, except for a lower alpha power in the elderly group. In orthostatism, alpha activity increased, significantly at 15 min after head-up change. Beta 1 and beta 2 wavebands were also increased, although to a smaller degree. This orthostatic EEG reactivity was blunted in the elderly group. Mechanisms possibly involved in these phenomena have been discussed and the effect of aging has been stressed.
在对60名年龄在22至82岁的正常志愿者进行的直立试验期间，分析了额中央、中央顶叶、顶枕叶和枕颞叶区域的脑电图功率谱。在躺下时记录静息脑电图，并与倾斜后立即及15分钟时所做的记录进行比较。形成了两个年龄组，每组各有30名受试者，平均年龄分别为38.3±8.8岁和65.4±8.1岁。除老年组的α功率较低外，两组的基线功率谱未发现差异。在直立状态下，α活动增加，在抬头改变后15分钟时显著增加。β1和β2波段也增加，尽管增幅较小。老年组的这种直立脑电图反应性减弱。已讨论了可能与这些现象有关的机制，并强调了衰老的影响。
