Gebber G L, Zhong S, Barman S M, Paitel Y, Orer H S
Department of Pharmacology/Toxicology, Michigan State University, East Lansing 48824-1317.
Am J Physiol. 1994 Aug;267(2 Pt 2):R387-99. doi: 10.1152/ajpregu.1994.267.2.R387.
Partial coherence analysis was used to remove the influences of the central circuits controlling a sympathetic nerve (as reflected by its discharges) on the coherence of the 10-Hz discharges of other sympathetic nerves in unanesthetized decerebrate or urethan-anesthetized cats. In many cases, partialization reduced but did not eliminate the sharp peak near 10 Hz in the coherence functions relating the discharges of sympathetic nerve pairs. This observation implies that the central sources of the 10-Hz rhythmic discharges of any nerve are not identical to those responsible for the rhythm recorded from any other nerve. Partial coherence analysis also revealed differential relationships among the 10-Hz rhythmic discharges of sympathetic nerves with different targets. Importantly, the pattern of differential relationships observed in one experiment could be the reverse of that in the next. Although the basis for the differential relationships is not yet clear, nonuniform coupling of multiple brain stem 10-Hz oscillators and/or nonuniform cross talk between spinal circuits controlling different sympathetic nerves may be involved.
在未麻醉的去大脑猫或氨基甲酸乙酯麻醉的猫中，采用偏相干分析来消除控制交感神经（由其放电反映）的中枢回路对其他交感神经10Hz放电相干性的影响。在许多情况下，偏相干处理降低了但并未消除交感神经对放电相干函数中10Hz附近的尖锐峰值。这一观察结果表明，任何神经10Hz节律性放电的中枢来源与负责记录任何其他神经节律的来源并不相同。偏相干分析还揭示了具有不同靶标的交感神经10Hz节律性放电之间的差异关系。重要的是，在一个实验中观察到的差异关系模式可能与下一个实验中的相反。虽然差异关系的基础尚不清楚，但可能涉及多个脑干10Hz振荡器的非均匀耦合和/或控制不同交感神经的脊髓回路之间的非均匀串扰。
