Barman S M, Gebber G L, Zhong S
Department of Pharmacology, Michigan State University, East Lansing 48824-1317.
Am J Physiol. 1992 Jun;262(6 Pt 2):R1006-14. doi: 10.1152/ajpregu.1992.262.6.R1006.
Frequency-domain analysis was used to characterize the relationships among the rhythmic discharges recorded simultaneously from two to four sympathetic nerves in unanesthetized decerebrate cats. The major new findings were as follows. 1) The 10-Hz rhythmic discharges of different nerves cohered strongly in baroreceptor-innervated and -denervated cats. 2) The interval between the discharges of two nerves was frequency dependent in the 10-Hz band in some cats, supporting the view that the 10-Hz rhythm is generated by multiple central circuits that are coupled. 3) In some cases the central circuits responsible for the 10-Hz rhythms nonuniformly affected different nerves. 4) In baroreceptor-innervated cats the coherence values for the cardiac-related discharges of any two nerves were significantly higher than those for the 10-Hz rhythms. 5) In baroreceptor-denervated cats the 10-Hz rhythmic discharges of different nerves cohered more strongly than the 2- to 6-Hz rhythms. 6) The 10-Hz rhythm usually was not a harmonic of the 2- to 6-Hz or cardiac-related rhythm. Thus these rhythms are generated independently.
频域分析被用于描述在未麻醉的去大脑猫中，同时记录的两根至四根交感神经的节律性放电之间的关系。主要的新发现如下：1）在压力感受器支配和去支配的猫中，不同神经的10赫兹节律性放电强烈相干。2）在一些猫中，两根神经放电之间的间隔在10赫兹频段内与频率相关，支持了10赫兹节律由多个耦合的中枢回路产生的观点。3）在某些情况下，负责10赫兹节律的中枢回路对不同神经的影响不一致。4）在压力感受器支配的猫中，任意两根神经与心脏相关的放电的相干值显著高于10赫兹节律的相干值。5）在压力感受器去支配的猫中，不同神经的10赫兹节律性放电比2至6赫兹节律的相干性更强。6）10赫兹节律通常不是2至6赫兹或与心脏相关节律的谐波。因此，这些节律是独立产生的。
