Yao Y Z, Liu G Q, Chen P X
Department of Physiology, Sun Yar-Sen University of Medical Sciences, Guangzhou.
Sheng Li Xue Bao. 1994 Feb;46(1):65-71.
Spontaneous firing and the discharges evoked by A- and/or C-fiber inputs (A-ED, C-ED, AC-ED) of saphenous nerve were recorded in the somatosensory cortical (SI) neurons (n = 128) of the cats anesthetized with chloralose and paralysed by gallamine. Normalized power spectrum density function (NPSDF) was used to analyse the neuron discharges. The results showed that 1) all the NPSDFs for the spontaneous discharges were single-peak with a peak frequency of 3.91 +/- 1.63 Hz (spontaneous rhythm) and a peak value of 0.0154 +/- 0.0045; 2) the NPSDFs of A-ED showed a single peak (peak value 0.021 +/- 0.0054) and an overlapped double-peak (with spontaneous discharge) or a separate multi-peak (without spontaneous discharge); 3) the NPSDFs of C-ED showed a single peak (peak value 0.020 +/- 0.007) or a separate double-peak; 4) the NPSDFs of AC-ED have two patterns: a single peak (peak value 0.023 +/- 0.004) and an overlapped multi-peak. It is suggested that A-fiber input can potentiate the rhythms of the spontaneous discharge and induce specific rhythm; that C-fiber input can potentiate the spontaneous rhythm and induce characteristic C-rhythm. It is also observed that both spontaneous rhythm and evoked rhythm affect each other; that the evoked rhythms by A-fiber and C-fiber inputs also affect each other.
在以水合氯醛麻醉并用三碘季铵酚麻痹的猫的体感皮层（SI）神经元（n = 128）中记录了隐神经的自发放电以及由A纤维和/或C纤维输入诱发的放电（A-ED、C-ED、AC-ED）。使用归一化功率谱密度函数（NPSDF）来分析神经元放电。结果表明：1）所有自发放电的NPSDF均为单峰，峰值频率为3.91±1.63 Hz（自发节律），峰值为0.0154±0.0045；2）A-ED的NPSDF显示为单峰（峰值0.021±0.0054）以及重叠双峰（伴有自发放电）或单独的多峰（无自发放电）；3）C-ED的NPSDF显示为单峰（峰值0.020±0.007）或单独的双峰；4）AC-ED的NPSDF有两种模式：单峰（峰值0.023±0.004）和重叠多峰。提示A纤维输入可增强自发放电的节律并诱导特定节律；C纤维输入可增强自发节律并诱导特征性C节律。还观察到自发节律和诱发节律相互影响；A纤维和C纤维输入诱发的节律也相互影响。
