AFaR, Department of Neuroscience, Hosp Fatebenefratelli, Isola Tiberina, Rome, Italy.
Clin Neurophysiol. 2010 Feb;121(2):163-71. doi: 10.1016/j.clinph.2009.11.002. Epub 2009 Dec 11.
It has been reported that GSM electromagnetic fields (GSM-EMFs) of mobile phones modulate--after a prolonged exposure--inter-hemispheric synchronization of temporal and frontal resting electroencephalographic (EEG) rhythms in normal young subjects [Vecchio et al., 2007]. Here we tested the hypothesis that this effect can vary on physiological aging as a sign of changes in the functional organization of cortical neural synchronization.
Eyes-closed resting EEG data were recorded in 16 healthy elderly subjects and 5 young subjects in the two conditions of the previous reference study. The GSM device was turned on (45 min) in one condition and was turned off (45 min) in the other condition. Spectral coherence evaluated the inter-hemispheric synchronization of EEG rhythms at the following bands: delta (about 2-4 Hz), theta (about 4-6 Hz), alpha 1 (about 6-8 Hz), alpha 2 (about 8-10 Hz), and alpha 3 (about 10-12 Hz). The aging effects were investigated comparing the inter-hemispheric EEG coherence in the elderly subjects vs. a young group formed by 15 young subjects (10 young subjects of the reference study; Vecchio et al., 2007).
Compared with the young subjects, the elderly subjects showed a statistically significant (p<0.001) increment of the inter-hemispheric coherence of frontal and temporal alpha rhythms (about 8-12 Hz) during the GSM condition.
These results suggest that GSM-EMFs of a mobile phone affect inter-hemispheric synchronization of the dominant (alpha) EEG rhythms as a function of the physiological aging.
This study provides further evidence that physiological aging is related to changes in the functional organization of cortical neural synchronization.
据报道，手机的全球移动通信系统（GSM）电磁场（GSM-EMF）在长时间暴露后会调制正常年轻受试者的颞叶和额部静息脑电图（EEG）节律的半球间同步[Vecchio 等人，2007]。在这里，我们检验了这样一个假设，即这种效应可以随着生理衰老而变化，作为皮质神经同步功能组织变化的标志。
在以前的参考研究的两种条件下，记录了 16 名健康老年人和 5 名年轻人的闭眼静息 EEG 数据。在一种情况下打开（45 分钟）GSM 设备，在另一种情况下关闭（45 分钟）。频谱相干性评估了 EEG 节律的半球间同步，包括以下频段：δ（约 2-4 Hz）、θ（约 4-6 Hz）、α1（约 6-8 Hz）、α2（约 8-10 Hz）和α3（约 10-12 Hz）。通过将老年受试者的半球间 EEG 相干性与由 15 名年轻受试者组成的年轻组（参考研究中的 10 名年轻受试者；Vecchio 等人，2007）进行比较，研究了衰老的影响。
与年轻受试者相比，老年受试者在 GSM 条件下表现出额部和颞部α节律的半球间相干性显著增加（p<0.001）。
这些结果表明，移动电话的 GSM-EMF 会影响主导（α）EEG 节律的半球间同步，这是生理衰老的一个功能。
本研究进一步证明，生理衰老与皮质神经同步功能组织的变化有关。
