Molteni Erika, Bianchi Anna Maria, Butti Michele, Reni Gianluigi, Zucca Claudio
Bioengineering Laboratory, IRCCS E. Medea, Bosisio Parini, Lecco, Italy.
Annu Int Conf IEEE Eng Med Biol Soc. 2007;2007:1298-301. doi: 10.1109/IEMBS.2007.4352535.
In clinical routine, the evaluation of sustained attention is often performed analyzing behavioral data collected during specific tests. It is not common to match such analyses with a detailed examination of the subject's simultaneous electroencephalographic (EEG) activity, and particularly its frequency content. In this study, 9 healthy volunteers underwent a modified Conners' CPT test, while their EEG were contemporarily recorded. Spectral power was calculated for each of the recorded EEG signals, with particular attention to frequency bands that are traditionally reported in literature. Then Compressed Spectral Array (CSA) sequence of spectra was plotted, and the analysis of the variability of the rhythms was carried out. Evaluation of the obtained results shows that the nine subjects shared a progressive backshift of alpha rhythm during the accomplishment of the CPT test. Moreover, beta and gamma activities were stronger in the right than in the left hemisphere. An intense and widespread decrease in EEG spectral power during test performing became visible in many subjects. Statistical analysis provided evidence that EEG activity correlates with the test behavioral results in many cerebral areas. For this reason, we encourage further investigations of the combined employment of tests and EEG recording during the clinical assessment of sustained attention performance.
在临床常规中，对持续注意力的评估通常是通过分析在特定测试期间收集的行为数据来进行的。将此类分析与对受试者同步脑电图（EEG）活动，特别是其频率成分的详细检查相匹配并不常见。在本研究中，9名健康志愿者接受了改良的康纳斯连续作业测试（Conners' CPT），同时记录他们的脑电图。计算每个记录的脑电图信号的频谱功率，特别关注文献中传统报道的频段。然后绘制频谱的压缩频谱阵列（CSA）序列，并对节律的变异性进行分析。对所得结果的评估表明，这9名受试者在完成连续作业测试期间，阿尔法节律出现了逐渐向后移位。此外，右侧半球的贝塔和伽马活动比左侧半球更强。在许多受试者中，测试过程中脑电图频谱功率出现了强烈且广泛的下降。统计分析提供了证据，表明脑电图活动与许多脑区的测试行为结果相关。因此，我们鼓励在持续注意力表现的临床评估中，进一步研究测试与脑电图记录的联合应用。
