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ci ji jia tu yan nao dui nei zang shen jing fang dian de ying xiang zhong de xia xing tong lu jiao cha wen ti
Author(s): 
Pages: 34-37
Year: Issue:  1
Journal: Acta Physiologica Sinica

Keyword:  自发放电延脑抑制点兴奋点刺激脊髓抑制效应通路家兔内脏兴奋性;
Abstract: 以家兔内脏神經自发放电为指标,观察了延脑交感中樞下行通路的交叉問題。刺激两侧延脑的兴奋点,都可使左侧内脏神經自发放电增强。刺激两侧的抑制点,都可使之减弱。沿正中线切断两侧延脑的联系后,两侧延脑的上述兴奋效应和抑制效应都不消失。另一组实驗在第1頸髓处切断右侧脊髓后,左侧延脑的上述两种效应都可以出現,但右侧延脑仅出現明显的抑制效应,其兴奋效应則显著减弱。由此可見,延脑調节內脏神經活动的兴奋性下行通路,在延脑仅有少量交叉,主要是沿同侧脊髓下行,在脊髓发生大量交叉。至于抑制性影响,則既可通过延脑,亦可通过脊髓,到达对侧内脏神經。
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