Başar E, Başar-Eroglu C, Rahn E, Schürmann M
Institute of Physiology, Medical University Lübeck, Germany.
Acta Otolaryngol Suppl. 1991;491:25-34; discussion 35. doi: 10.3109/00016489109136778.
We performed an analysis of topographic and modality-dependent responsiveness of auditory and visual cortex in 5 cats and of vertex and occipital derivations in 12 human subjects. The evoked potentials were studied in the frequency domain by means of the Fourier transform. Furthermore, digital filtering was applied to confirm and extend the analysis. Preliminary results indicate that resonances were observed mainly in the 5, 10, 20 and 40 Hz frequency bands. The frequency of resonance maxima depended on the sites of measurement electrodes and stimulus modality. It is concluded that the analysis of resonance phenomena in the brain is a useful approach to understanding the relation between evoked potentials, evoked magnetic fields and single-cell recordings.
我们对5只猫的听觉和视觉皮层的地形学及模态依赖性反应，以及12名人类受试者的头顶和枕部导联进行了分析。通过傅里叶变换在频域中研究诱发电位。此外，应用数字滤波来确认和扩展分析。初步结果表明，共振主要出现在5、10、20和40赫兹频带。共振最大值的频率取决于测量电极的位置和刺激模态。得出的结论是，分析大脑中的共振现象是理解诱发电位、诱发磁场和单细胞记录之间关系的一种有用方法。
