Vaisanen Outi, Malmivuo Jaakko
Ragnar Granit Institute, Tampere University of Technology, Tampere, Finland.
Annu Int Conf IEEE Eng Med Biol Soc. 2007;2007:5194-7. doi: 10.1109/IEMBS.2007.4353512.
The purpose of the present study is to conduct preliminary experimental measurements to validate the improvement in the detection of deep EEG sources achieved with new multielectrode EEG leads. As a measurement we had brainstem auditory evoked potentials (BAEPs), which include deep generators in the brainstem and midbrain. The BAEPs were measured with a 124-channel EEG cap. We have previously developed a multielectrode lead technique, which has its basis in optimization of the sensitivity distribution of a multielectrode lead for detecting signals generated by deep sources. The purpose of the present study is to validate with experimental measurements the results previously obtained with theoretical approach and simulations. The results show that the amplitude SNR of BAEPs obtained with multielectrode lead is on average 1.6 times that of traditional bipolar BAEP lead. Though improvement obtained in experimental measurements is smaller than was theoretically approximated it encourages for further development of the multielectrode leads.
本研究的目的是进行初步实验测量，以验证新型多电极脑电图导联在检测深部脑电图源方面所取得的改进。作为一项测量，我们记录了脑干听觉诱发电位（BAEP），其包括脑干和中脑的深部发生器。使用124通道脑电图帽测量BAEP。我们之前开发了一种多电极导联技术，其基础是优化多电极导联的灵敏度分布，以检测深部源产生的信号。本研究的目的是通过实验测量验证先前用理论方法和模拟获得的结果。结果表明，多电极导联获得的BAEP的幅度信噪比平均是传统双极BAEP导联的1.6倍。尽管实验测量中获得的改进比理论近似值小，但这鼓励了多电极导联的进一步发展。
