Barry Robert J, De Blasio Frances M
Brain & Behaviour Research Institute and School of Psychology, University of Wollongong, Wollongong, NSW, Australia.
Brain & Behaviour Research Institute and School of Psychology, University of Wollongong, Wollongong, NSW, Australia.
Biol Psychol. 2017 Oct;129:293-304. doi: 10.1016/j.biopsycho.2017.09.010. Epub 2017 Sep 21.
In young adults and children, the eyes-closed (EC) resting state is one of low EEG arousal, with the change to eyes-open (EO) primarily involving an increase in arousal. We used this arousal perspective to interpret EC/EO differences in healthy young and older adults. EEG was recorded from 20 young (M=20.4years) and 20 gender-matched older (M=68.2years) right-handed adults during two 3min resting conditions; EC then EO. Older participants displayed less delta and theta, some reduction in alpha, and increased beta. Global activity in all bands reduced with opening the eyes, but did not differ with age, indicating that the energetics of EEG reactivity is maintained in healthy ageing. However, older adults had more focal changes than young adults, particularly in beta, suggesting the mobilisation of additional localised resources. This maintained reactivity, and heightened focal activity, may underlie preserved performance levels in healthy ageing.
在年轻人和儿童中，闭眼静息状态是一种脑电图唤醒水平较低的状态，而转变为睁眼状态主要涉及唤醒水平的提高。我们运用这种唤醒视角来解释健康年轻人和老年人在闭眼/睁眼状态下的差异。在两种3分钟的静息状态下（先闭眼，后睁眼），对20名年轻（平均年龄20.4岁）和20名年龄匹配的年长（平均年龄68.2岁）右利手成年人进行脑电图记录。年长参与者的δ波和θ波较少，α波有所减少，β波增加。睁眼后所有频段的整体活动均减少，但与年龄无关，这表明脑电图反应的能量学在健康衰老过程中得以维持。然而，年长成年人比年轻成年人有更多的局灶性变化，尤其是在β波方面，这表明调动了额外的局部资源。这种维持的反应性和增强的局灶性活动可能是健康衰老过程中表现水平得以保持的基础。
