De Vico Fallani Fabrizio, Astolfi Laura, Cincotti Febo, Mattia Donatella, Marciani Maria Grazia, Gao Shangkai, Salinari Serenella, Soranzo Ramon, Colosimo Alfredo, Babiloni Fabio
IRCCS "Fondazione Santa Lucia", Rome, Italy; Interdepartmental Research Centre for Models and Information Analysis in Biomedical Systems, University "Sapienza", Rome, Italy.
Clin Neurophysiol. 2008 Oct;119(10):2231-7. doi: 10.1016/j.clinph.2008.06.018. Epub 2008 Aug 29.
This work intends to evaluate the functional characteristics of the cerebral network during the successful memory encoding of TV commercials.
We estimated the functional networks in the frequency domain from a set of high-resolution EEG data in a group of healthy subjects during the showing of commercial spots within a neutral documentary. We evaluated the differences in the cortical network associated with later remembered and not-remembered commercials by calculating the global-E(g) and local-efficiency E(l) indexes.
Successful encoding of TV spots significantly affects the functional communication among cortical areas irrespectively of the frequency band. During the visualization of the video-clips that will be forgotten (FRG), the cortical network exhibited high values of global- and local-efficiency, reflecting a small-world configuration. During the visualization of the video-clips that will be remembered (RMB), the same indexes appeared significantly lower. This difference was especially evident for E(l) in the alpha band and for E(g) in the beta and gamma bands.
The presence of attentional and semantic processes during the RMB condition leads to a significant reduction of the network communication efficiency.
Such a reduction could represent a predictive measure of accurate recalls of TV spots.
本研究旨在评估电视广告成功记忆编码过程中脑网络的功能特征。
我们从一组健康受试者在中性纪录片播放商业广告片段期间的一组高分辨率脑电图数据中，在频域估计功能网络。我们通过计算全局效率（E(g)）和局部效率（E(l)）指标，评估与后来被记住和未被记住的广告相关的皮质网络差异。
电视广告的成功编码显著影响皮质区域之间的功能交流，与频段无关。在将被遗忘的视频片段（FRG）可视化期间，皮质网络表现出高全局和局部效率值，反映出小世界结构。在将被记住的视频片段（RMB）可视化期间，相同指标显著降低。这种差异在α波段的E(l)以及β和γ波段的E(g)中尤为明显。
在RMB条件下注意力和语义过程的存在导致网络通信效率显著降低。
这种降低可能代表电视广告准确回忆的预测指标。
