多年来一直有研究报告指手机辐射可能和脑癌有关，但最新研究却发现，原来手机释出的电磁波有对抗或预防老人痴呆的效果，有望为老人痴呆的疗法带来新希望。
研究人员发现，手机释出的电磁波，可以增进认知功能。由于多年来不少研究报告都对手机的使用发出警告，指或容易导致脑瘤，但美国佛罗里达州一群科学家却赫然发现，原来手机的辐射可能对脑部有益。
他们从最新的研究结果得出结论，指有充足信心相信，电磁波对增进记忆和治疗老人痴呆的效用，应多加研究。
这班科学家是来自南佛罗里达大学细胞生物学系的研究人员，他们以九十六只实验鼠为对像，令它们暴露在类似手机发出的辐射水平下连续八个月。它们都住近手机天线的笼内，研究人员每天早上和下午各把手机天线的开关开一次，每次一小时，等同频密使用手机用户的接收辐射水平。
其中一半实验鼠经过基因改造，令其出现老人痴呆的征状，但当它们一经接触电磁波，在脑部形成的淀粉样斑块(amyloid plaques)便会消失。由于淀粉样斑块会加快破坏脑细胞，使之死亡，被视为老人痴呆症发病的原因。
推荐原始出处：
J Alzheimers Dis. 2009 Sep 11
Electromagnetic Field Treatment Protects Against and Reverses Cognitive Impairment in Alzheimer's Disease Mice.
Arendash GW, Sanchez-Ramos J, Mori T, Mamcarz M, Lin X, Runfeldt M, Wang L, Zhang G, Sava V, Tan J, Cao C.
The Florida Alzheimer's Disease Research Center, Tampa, FL, USA Department of Cell Biology, Microbiology, and Molecular Biology, University of South Florida, Tampa, FL, USA.
Despite numerous studies, there is no definitive evidence that high-frequency electromagnetic field (EMF) exposure is a risk to human health. To the contrary, this report presents the first evidence that long-term EMF exposure directly associated with cell phone use (918 MHz; 250 mW/kg) provides cognitive benefits. Both cognitive-protective and cognitive-enhancing effects of EMF exposure were discovered for both normal mice and transgenic mice destined to develop Alzheimer's-like cognitive impairment. The cognitive interference task utilized in this study was designed from, and measure-for-measure analogous to, a human cognitive interference task. In Alzheimer's disease mice, long-term EMF exposure reduced brain amyloid-beta (Abeta) deposition through Abeta anti-aggregation actions and increased brain temperature during exposure periods. Several inter-related mechanisms of EMF action are proposed, including increased Abeta clearance from the brains of Alzheimer's disease mice, increased neuronal activity, and increased cerebral blood flow. Although caution should be taken in extrapolating these mouse studies to humans, we conclude that EMF exposure may represent a non-invasive, non-pharmacologic therapeutic against Alzheimer's disease and an effective memory-enhancing approach in general.
