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针刺镇痛中α和β受体的作用及其对脑内5—羟色胺代谢的影响 总被引:1,自引:0,他引:1
<正> 据报道,针刺镇痛时脑内去甲肾上腺素(NE)的含量明显降低;损毁 NE 能神经元胞体密集分布的蓝斑或上行途径,或者用双硫醒等抑制 NE 合成以降低脑内 NE 含量,均可增强针刺镇痛;刺激蓝斑或注射 NE 前体二羟基苯丝氨酸使脑内 NE 含量增加时,可对抗针刺 相似文献
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<正> 中枢儿茶酚胺(CA)主要有去甲肾上腺素(NA)和(DA)。我们曾观察到电针后大鼠脑内 NA 和 DA 含量发生显著变化,这种效应与所用的电针频率和强度有密切关系。许多实验研究也支持 NA 和 DA参与针刺镇痛过程。此外,阿片受体拮抗剂纳洛酮广泛被用来间接检查某一生理过程是否有内源性吗啡样物质参与。大量实验表明,无论全身性或脑室注射纳洛酮可以阻断或降低针刺的效应。由于脑内多种神经化学物质在代谢和功能上有着密切的联系。在本工作中,我们观察了大鼠腹腔注射纳洛酮对电针镇痛效应及其脑内 NA 和 DA 含量变化的影响,以便探讨阿片受体在针刺镇痛中对中枢 CA 的调节作用。 相似文献
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摘除垂体对大鼠脑内5-羟色胺、去甲肾上腺素及针刺镇痛的影响 总被引:2,自引:0,他引:2
<正> 从往的实验表明,大鼠摘除垂体后,针刺镇痛效应明显减弱;摘除垂体后注射促肾上腺皮质激素(ACTH),针刺镇痛效应得到恢复。并认为ACTH恢复针刺镇痛效应的作用与皮质酮无关,从而提示,ACTH在针刺镇痛过程中可能具有中枢作用。因针刺镇痛与脑内5-羟色胺(5-HT)神经元及去甲肾上腺素(NE)神经元的神经传递密切相关,所以,进一步阐明垂体在针刺镇痛中的作用机制,显然是有意义的。本文采用摘除大鼠垂体的方法,观察对脑内5- 相似文献
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<正> 我们以前的研究发现,针刺镇痛时大鼠脑内去甲肾上腺素(NA)含量发生明显变化,而且它与针刺镇痛有密切的关系。许多研究资料也支持中枢 r-氨基丁酸(GABA)和乙酰胆碱(ACh)参与针刺镇痛过程。由于脑内各种神经介质在代谢和功能上存在密切的联系和动态平衡。在本工作中,我们观察了大鼠腹腔注射 相似文献
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本实验用30只成年健康SD大鼠,分成对照组、羊红血球(SRB)免疫5天组和新生期谷氨酸单钠(MS)处理+SRBC组。记录下丘腹内侧核(VMH)神经元自发放电和电针、蓝斑(LC)刺激的作用。结果如下:(1)SRBC组大鼠VMH神经元自发放电频率明显增加,MSG+SRBC组大鼠VMH神经元自发放电频率高于对照组,低于SRBC组。各组间均有统计学差品(2)电针明显增加各组动物VMH神经元放电频率,SRBC组增加最明显,其次是MSG+SRBC组。(3)LC刺激使SRBC组和MSG+SRBC组多数VMH神经元呈现先激活后抑制的双相放电改变,电外可部分增加SRBC组动物LC对VMH的激活性控制。结果表明,VMH可能是免疫反应过程中重要的神经内分泌环节。电针能增强SRBC对VMH的免疫作用。LC和下丘脑弓状核区β-内啡肽神经元均参与电针对VMH免疫调节控制。 相似文献
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大脑皮层体感Ⅱ区对中缝大核下行痛抑制活动的调控及其与电针镇痛的关系 总被引:2,自引:0,他引:2
用玻璃微电极细胞外记录大鼠(NRM)神经元单位放电及其对尾尖伤害性刺激的反应,研究表明刺激 SmⅡ可增加 NRM 神经元的自发放电,抑制其伤害性反应;与电针对 NRM 的效应相似,发现两者具有相关性。提示:SmⅡ对 NRM 镇痛机制可以发挥下行性调控,电针对 NRM 的影响可能部分是经激活 SmⅡ,再转而作用于 NRM 的。 相似文献
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T-lymphocyte transformation ability decreased and the function of the B-lymphocyte and mononuclear leucocyte/macrophage system increased when the activity of central serotonergic neurons was enhanced by the stimulation of nucleus dorsal raphe (NDR). These changes induced by NDR stimulation were not effected by electroacupuncture (EA) when EA was performed on the background of NDR stimulation. By comparing these results with the previous resultant that immunoreactions were affected by locus coeruleus (LC) stimulation and LC stimulation plus EA, some regularity had been discovered. So, a hypothesis was put forward by us that the catecholaminergic system plays a main role in EA regulation of cellular immunity while the serotonergic system plays such a role in EA regulation of humoral immunity. 相似文献
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电针穴位对内脏-耳穴反应的影响 总被引:3,自引:1,他引:2
<正> 临床和实验研究皆证实,内脏疾患可引起耳廓导电量增加和低电阻点增多的反应。此种反应可能有部位上的相对特异性,可称之为内脏—耳穴反应。这一内脏与耳廓相联系的现象与中医的经穴脏腑相联系的现象一致。但是,内脏、耳穴、体穴三者之间是否有关?针刺某一穴位除能调整内脏功能外是否能对内脏—经穴反应有一定的影响?这也是很有意义的课题。本实验是以电刺激胃迷走神经或电刺激心脏引起耳廓特异部位的导电量增加和低电阻点增多,再电针相应体穴或对侧耳廓相应点观察对内脏—耳穴反应的影响,来进一步研究经穴脏腑的关系。 相似文献
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VascularDementia(VD),adementiasyndromecausedbycerebralvasculardisorder,usuallyaccompaningwithhypertension,coronaryheartdisease,etc.IthasbeenconfirmedthathypertensionistheindependenthighriskfactorofVD.Repeatedcerebralischemiaoftenleadstoirreversibleinjury… 相似文献
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Although the opioid system plays a pivotal role in the analgesic effect of electroacupuncture (EA), it has been suggested that other peptidergic systems also may be involved in the therapeutic effect of EA. Among several peptides for EA-induced analgesia, catecholamine (CA) is associated with the descending pain inhibitory system. We evaluated whether the different frequencies of EA modified the cellular activity of central CA synthesizing neurons using double labeling immunohistochemistry between Fos-like immunoreactive (FLI) neurons and dopamine-beta-hydroxylase (DBH)/tyrosine hydroxylase (TH)-positive neurons. We observed that different frequencies of EA increased the number of FLI neurons in catecholaminergic neurons, such as the dorsal raphe (DR), hypothalamic arcuate nucleus (Arc), locus coeruleus (LC), A5 noradrenaline cells (A5), and A7 noradrenaline cells (A7). In addition, different frequencies of EA significantly increased the ratio of colocalization between FLI neurons and TH positive neurons in DR, LC and Arc. Only low frequency EA increased the neuronal activity in Arc. The ratio of double labeling between FLI and DBH positive neurons was also elevated at both LC and A5. These data demonstrate that different frequencies of EA increase the cellular activity of central CA synthesizing neurons, suggesting that the CA system plays an important role in EA-induced analgesia. 相似文献