Freeman W J, Viana Di Prisco G
Behav Neurosci. 1986 Oct;100(5):753-63. doi: 10.1037//0735-7044.100.5.753.
Oscillatory electroencephalographic bursts were measured from 64 electrodes implanted on the olfactory bulbs of rabbits. Oscillatory bursts that occurred before and during presentation of odorant conditioned stimuli (CSs) were selected in brief segments. Comparisons between the 64 traces and their spectra showed that, despite amplitude differences between channels, every burst had a common waveform over the entire array. The spectra showed 2 to 5 distinct peaks in each burst. Each trace was fitted with the sum of 5 cosines to express the burst in ten 8 X 8 matrices of amplitude and phase values at its peak frequencies. Two types of burst were identified. Those with dominant frequencies greater than 55 Hz had one narrow dominant spectral peak and reproducible spatial patterns of its amplitude within subgroups of bursts relating to control and odorant CS conditions. Those with dominant frequencies less than 55 Hz were disorderly; their spectra were broad, and their spatial patterns of amplitude did not reproduce within subgroups. A behavioral assay showed that the high- and not the low-frequency bursts contained odor-specific information.
从植入兔子嗅球的64个电极测量振荡性脑电图爆发。在短暂时间段内选择在气味条件刺激（CSs）呈现之前和期间发生的振荡性爆发。64条轨迹及其频谱之间的比较表明，尽管各通道之间存在幅度差异，但每个爆发在整个阵列上都有一个共同的波形。频谱显示每个爆发中有2至5个不同的峰值。每条轨迹都用5个余弦之和拟合，以在其峰值频率下的十个8×8幅度和相位值矩阵中表达爆发。识别出两种类型的爆发。主导频率大于55Hz的爆发有一个狭窄的主导频谱峰值，并且在与对照和气味CS条件相关的爆发子组内其幅度具有可重复的空间模式。主导频率小于55Hz的爆发是无序的；它们的频谱很宽，并且其幅度的空间模式在子组内不会重现。行为分析表明，高频而非低频爆发包含气味特异性信息。
