Edelstyn Nicola, Oldershaw Anna
Department of Psychology, University of Keele, Staffs, UK.
Neuroreport. 2002 Jan 21;13(1):119-21. doi: 10.1097/00001756-200201210-00028.
The aim of our study was to investigate the effects of acute mobile phone exposure on a range of tasks which tapped capacity and processing speed within the attentional system. Thirty-eight healthy volunteers were randomly assigned to either an experimental group which was exposed to a connected mobile phone or a control group in which the mobile phone was switched off. Subjects remained blind to mobile phone status throughout duration of study. The experimental group were exposed to an electromagnetic field emitted by a 900 MHz mobile phone for 30 min. Cognitive performance was assessed at three points (prior to mobile phone exposure, at 15 and 30 min post-exposure) using six cognitive neuropsychological tests (digit span and spatial span forwards and backwards, serial subtraction and verbal fluency). Significant differences between the two groups were evident after 5 min on two tests of attentional capacity (digit span forwards and spatial span backwards) and one of processing speed (serial subtraction). In all three instances, performance was facilitated following mobile phone exposure. No deficits were evident. These findings are discussed in terms of possible functional and neuroanatomical bases.
我们研究的目的是调查急性手机暴露对一系列任务的影响，这些任务涉及注意力系统中的能力和处理速度。38名健康志愿者被随机分为两组，一组为实验组，暴露于处于接通状态的手机环境中；另一组为对照组，手机处于关机状态。在整个研究过程中，受试者对手机状态均不知情。实验组暴露于900兆赫手机发出的电磁场中30分钟。使用六项认知神经心理学测试（顺背和倒背数字广度、顺背和倒背空间广度、连续减法和言语流畅性）在三个时间点（手机暴露前、暴露后15分钟和30分钟）评估认知表现。在两项注意力能力测试（顺背数字广度和倒背空间广度）和一项处理速度测试（连续减法）中，5分钟后两组之间出现了显著差异。在所有这三种情况下，手机暴露后表现均得到改善。未发现明显缺陷。我们从可能的功能和神经解剖学基础方面对这些发现进行了讨论。
