NEURONS DISCHARGE AND C-FOS EXPRESSION IN NTS FOLLOWING ELECTROACUPUNCTURE AT ACUPOINTS OF STOMACH MERIDIAN OF FOOTYANGMING

The nucleus of solitary tract(NTS) is a primary center for both visceral afferents and somatic afferents.Previous experiments demonstrated that NTS is associated with the connection of the stomach and acupoints in Stomach Meridian of Foot-Yangming(ST Meridian).In this study, extracellular recording and immunochemistry method were used to analyze the discharging neurons and c-Fos protein expression in NTS after electroacupuncture at different acupoints and non-acupoint.A total of 104 discharging neurons were detected in the NTS of 52 rats, of which, 86 were provided with complete data.After acupuncturing at Sibai(ST2), Zusanli(ST36), Neiting(ST44), Quanliao(SI18) and non-acupoint, the response neuron occurring rates(RNORs) in NTS were 65.12%, 51.16%, 46.51%, 34.88% and 31.40% respectively.For RNORs, there was a significant difference among Sibai(ST2), Zusanli(ST36), Neiting(ST44), Quanliao(SI18) and nonacupoint(P0.01 or P0.05).Accordingly, in other 48 rats, the number of c-fos immunoreactive(c-fos-IR) neurons in the NTS after electroacupuncture(EA) at Sibai(ST2) was significantly higher than that of at other acupoints and non-acupoint(P0.05 or P0.01).Both EA at Zusanli(ST36) and Neiting(ST44) increased c-fos-IR neurons significantly compared with that of at Quanliao(SI18) and non-acupoint(P0.05 or P0.01), while there was no difference between EA at Quanliao(SI18) and nonacupoint(P0.05).The experiments demonstrated that the afferent convergence in NTS is different by body surface point stimulus, which suggested that NTS might be a primary center in the central nervous system(CNS) which received acupoint stimulus from ST Meridian.     

针刺大鼠“四白”传入信息对孤束核神经元放电的影响

目的:比较足阳明经中远近腧穴及手太阳小肠经腧穴和非经非穴点的传入信息在孤束核(NTS)的差异。方法:采用细胞外记录方法,以足阳明胃经“四白”穴为刺激点,并以同名经的“地仓”和“内庭”、手太阳小肠经的“颧”、非经非穴“四白”旁开点为对照,在刺激点上用手针施以捻转手法刺激30 s,在NTS寻找对来自体表刺激点有反应的神经元。结果:52只大鼠记录到资料完整的86个NTS神经元中,针刺“四白”后NTS有反应神经元出现的机率(含兴奋和抑制性神经元)为65.12%,而针刺“地仓”“内庭”“颧”“四白”旁开点有反应神经元出现的机率分别为50.00%、46.51%、34.88%、31.40%。统计表明,针刺“四白”后NTS有反应神经元出现的机率均极显著地高于针刺“地仓”“内庭”“颧”“四白”旁开点后有反应神经元出现的机率(P<0.01);针刺“地仓”和“内庭”后NTS有反应神经元出现的机率均显著高于刺激“颧”和“四白”旁开点的有反应神经元出现机率(P<0.05)。针刺上述穴和非穴区,NTS神经元主要是以兴奋为主。针刺“四白”“地仓”“内庭”“颧”“四白”旁开点,其兴奋性神经元频率变化率分别为(35.08±4.80)%、(28.25±5.46)%(、27.57±4.87)%、(20.02±4.23)%(、18.55±2.49)%,“四白”与各组之间有显著性或极显著性差异(P<0.05或P<0.01),“地仓”“内庭”与“颧”“四白”旁开点亦有显著性或极显著性差异(P<0.05或P<0.01)。结论:与手太阳小肠经穴以及非经非穴点比较,足阳明经穴与NTS的关系更密切;足阳明经中远近腧穴的信息传入在NTS亦存在着一定的差异,这提示腧穴均有一定的特异性。     

Neuron Discharge and c-Fos Expression in the Nucleus of the Solitary Tract Following Electroacupuncture at Acupoints of the Yangming Stomach Meridian of Foot

The nucleus of the solitary tract (nucleus tractus solitarii; NTS) is a primary center for both visceral afferents and somatic afferents. Previous experiments have demonstrated that the NTS is closely connected to the stomach and acupoints in the Yangming Stomach Meridian of Foot (ST Meridian). In this study, extracellular recording and immunochemistry methods were used to analyze the discharge of neurons and c-Fos protein expression in the NTS following acupuncture at different acupoints and a nonacupoint. A total of 104 discharging neurons were detected in the NTS of 52 rats, of which 86 provided complete data. After acupuncture at Sibai (ST 2), Zusanli (ST 36), Neiting (ST 44), Quanliao (SI 18), and the nonacupoint, the neuron response rate in the NTS was 65.12%, 51.16%, 46.51%, 34.88% and 31.40% respectively. For neuron response rate, there was a significant difference among Sibai (ST 2), Zusanli (ST 36), Neiting (ST 44), Quanliao (SI 18), and the nonacupoint (p < 0.01 or p < 0.05). In the other 48 rats, the number of c-Fos immunoreactive neurons in the NTS by electroacupuncture (EA) at Sibai (ST 2) group was significantly higher than that EA at other acupoints and the nonacupoint (p < 0.05 or p < 0.01). EA at both Zusanli (ST 36) and Neiting (ST 44) increased c-Fos immunoreactive neurons significantly over EA at Quanliao (SI 18) and the nonacupoint (p < 0.05 or p < 0.01), while there was no difference between EA at Quanliao (SI 18) and the nonacupoint group (p > 0.05). The experiments demonstrated that the afferent convergence in NTS are different by body surface points stimulus, which suggests that the NTS might be a primary center in the central nervous system receiving acupoints stimulus from the ST Meridian.     

Neurons in the NTS of rat response to gastric distention stimulation and acupuncture at body surface points

The nucleus of the solitary tract (NTS) is a primary center, not only for receiving visceral afferents, but also for somatic afferents. Previous experiments demonstrated that NTS might be a primary afferent center for connecting the Stomach Meridian (ST Medirian) and the Stomach. In this study, an extracellular recording method was used to analyze the firing neurons. The variety of NTS' neurons' responses to gastric distention (GD) and different body surface points were compared. In 52 rats, 104 firing neurons of NTS were recorded, in which there were 47 GD related neurons. For the 47 GD related neurons, there were 33 neurons responsive to acupuncture at sibai (ST 2, belonging to ST Meridian). Therefore, in the 47 GD related neurons, the response neuron occurring rate (RNOR) for acupuncture at ST 2 was 70.21%. Meanwhile in the 47 GD related neurons, when acupuncture was performed at Quanliao (SI 18, belonging to Small Intestine Meridian) and non-acupoint respectively, there were 18 and 17 firing neurons, and the RNOR were 38.30% and 36.17% respectively. The experiment demonstrated that there were some varieties in the response of NTS neurons to GD stimuli and acupuncture at different body surface points, which suggested that the ST Meridian was more intimately linked to the stomach and that the different acupoints do have some specificity.     

经脉线与非经脉线微循环血流灌注量的比较及针刺对其的影响

目的:比较常态下胃经与其两侧旁开的非经对照点的微循环血流灌注量有无差异以及电针对其的影响。方法:应用激光多谱勒血流仪,对21名健康成年志愿者进行观察。先将418-1型测试探头固定在所要测试部位,然后将一次性静脉留置针在胃经的上巨虚、梁丘、阴市、伏兔4个穴位和阴市与伏兔中点的非穴位点及其左右旁开1cm对照点插至1cm深度,导入光纤,尽量减少直射光的干扰,分别检测常态下及电针足三里时经脉线与非经脉线微循环血流灌注量情况。结果:①上巨虚、梁丘、阴市、伏兔4个穴位和阴市-伏兔中点的非穴位点的深部组织微循环血流灌注量都高于其两侧旁开非经对照点(P<0.01);②与电针前比,电针后胃经线下深部组织微循环血流灌注量较针前略有增高,但差异无统计学意义(P>0.05);③电针刺激可以使胃经循行线下的微循环更加均匀、顺畅。结论:沿胃经循行线下深部组织中的微循环血流灌注量均高于两侧非经对照部位,电针刺激可以使胃经循行线下的微循环更加均匀、顺畅,证实深部组织中的血流是形成循经红外辐射轨迹的主要热源,也可能是经脉参与人体机能调节活动的重要基础。     

神经蛇毒处理眶下神经对电针镇痛作用的影响

目的:探讨粗纤维在电针"四白"穴对内脏痛的镇痛效应中的作用及其传入途径。方法:SD大鼠36只,随机分为空白组,内脏痛组、电针组、眶下神经切断组,神经蛇毒组及生理盐水组,每组6只。切断大鼠双侧眶下神经以及双侧眶下神经鞘内注射神经蛇毒选择性破坏A类纤维,然后电针双侧"四白"穴,再腹腔注射乙酸造成内脏痛模型,观察大鼠内脏痛的行为学变化(扭体反应)以及孤束核(NTS)和三叉旁核(PTN)的c-fos表达。结果:电针组大鼠扭体次数较内脏痛组明显减少(P0.01),眶下神经切断组大鼠扭体次数较电针组明显增加(P0.01),神经蛇毒组大鼠扭体次数少于内脏痛组(P0.05)。电针组NTS的c-fos表达较内脏痛组明显减少(P0.05),眶下神经切断组较电针组明显增加(P0.01),神经蛇毒组显著低于内脏痛组(P0.05)。电针组PTN的c-fos表达较内脏痛组明显增加(P0.01),眶下神经切断组较电针组明显减弱(P0.01),神经蛇毒组较眶下神经切断组和内脏痛组明显增强(P0.01)。结论:粗纤维不是电针"四白"穴对内脏痛大鼠镇痛效应的主要传入纤维,口面部的躯体感觉传入可能经PTN中继后与内脏的感觉传入在NTS发生汇聚并进行整合,从而产生镇痛作用。     

辣椒素处理对电针“四白”穴诱导三叉神经脊束核尾侧亚核c-fos表达的影响

目的:探讨四白穴针刺效应的传入途径。方法:SD大鼠36只,随机分成空白组、假手术组、辣椒素组、溶媒组、电针"四白"穴+辣椒素组、电针"四白"穴+溶媒组。游离一侧眶下神经,辣椒素组将浸泡有1.5%辣椒素的棉条包绕在眶下神经上。溶媒组用浸泡在溶媒中的棉条包绕在眶下神经上。采用免疫组化技术观察三叉神经脊束核尾侧亚核(cSTN)的c-fos表达。结果:空白组在cSTN各层可见到零星、散在的阳性细胞。溶媒组、辣椒素组以及假手术组cSTN的c-fos阳性细胞数与空白组相似。电针"四白"穴+溶媒组c-fos在cSTN内主要集中在浅层(Ⅰ-Ⅱ层),其阳性细胞的数量明显多于其余各组(P<0.01);cSTN的深层(Ⅲ-Ⅳ层)c-fos数量多于空白组、溶媒组和假手术组(P<0.01,P<0.05,P<0.05)。电针"四白"穴+辣椒素组cSTN的Ⅰ-Ⅱ板层的c-fos阳性细胞数与电针"四白"穴+溶媒组相比明显减少(P<0.01),但cSTN的Ⅲ-Ⅳ板层的c-fos阳性细胞数与电针"四白"穴+溶媒组相比无明显变化(P>0.05)。结论:C纤维可能是四白穴针刺效应(调节胃功能活动)的主要传入途径。     

Electro-acupuncture of Foot YangMing regulates gastric activity possibly through mediation of the dorsal vagal complex

Acupuncture at some specific acupoints of Foot Yangming can regulate gastric activity. However, its precise mechanism remains unknown. In our study, the effects and mechanism of electro-acupuncture (EA) at Tsusanli (ST 36), Shangchuhsu (ST 37) on the regulation of gastric activity were observed. EA at Tsusanli showed that gastric electric change had a significantly higher frequency and wave amplitude as compared to that of the Shangchuhsu group and other groups. EA at Shangchuhsu demonstrated the change of gastric electric was greater than that of the non-acupoint group and the control group. After bilateral vagotomy, the change of electro gastric graph (EGG) of EA at Tsusanlis was not significant compared to the control group. In the mean time, we have observed the electric discharge of the neurons in NTS and DMV. The frequency of electro-physiological activity in nucleus of solitary tract (NTS) and dorsal motor nucleus of the vagus nerve (DMV) in Tsusanli group and Shangchuhsu group were markedly increased compared with that in other groups. The results have indicated that EA at Tsusanli and Shangchuhsu not only regulate gastric activity, but also activate neurons in NTS and DMV significantly. Our study suggests that the effect of EA at Tsusanli and Shangchuhsu on the gastric activity may partially depend upon integrated nerve pathway and related central neurons in dorsal vagal complex.     

电针不同穴组对胃癌大鼠术后免疫功能的影响

目的:研究针刺"足三里"合谷"三阴交"3个穴位不同配穴组对胃癌大鼠术后免疫功能的影响。方法:雄性Wistar大鼠用Walker-256细胞株复制种植性胃癌模型,并行手术根治。术后第3天,将大鼠随机分为9组:足三里组、合谷组、三阴交组、足三里+合谷组、合谷+三阴交组、足三里+三阴交组、足三里+合谷+三阴交组、非穴位针刺组和模型组,每组6只;另设正常组6只。电针治疗选择疏密波,频率2~100Hz,电流强度1~3mA,每日1次,持续30min,共7d。用单向免疫扩散法测定各组大鼠外周血中体液免疫指标:免疫球蛋白IgG、IgM、IgA,补体C3、C4含量;流式细胞仪测定细胞免疫指标:T淋巴细胞亚群CD4+、CD8+细胞百分率及CD4+/CD8+比值。结果:与模型组比较,非穴位针刺组IgG、IgM、IgA、C3、C4、CD4+、CD8+及CD4+/CD8+比值差异无显著性意义(P>0.05);针刺各组,其体液免疫、细胞免疫水平增高,与模型组比较差异有显著性(P<0.05,0.01)。与正常组比较,足三里+合谷+三阴交组体液免疫、细胞免疫水平差异无显著性意义(P>0.05)。结论:电针"足三里"合谷"三阴交"对大鼠胃癌根治术后低下的免疫功能有明显促进作用,3个穴位同时使用刺激机体免疫功能作用最好。     

正常成年人下肢穴位疼痛阈值检测

目的:比较人体下肢穴位与非穴位痛阈的差异,探讨穴位的相对特异性。方法:制定人体随机测量数据表和人体体表图。选无心理和生理疾病的66名成年人,用Von Frey测量小腿和足部感受器阈值,分析对比穴位与非穴位痛阈值的异同。结果:膀胱经承山、昆仑、京骨和束骨的痛阈显著低于非穴位,昆仑的痛阈值最低(P<0.05);足三里同一水平节段穴位足三里、阴陵泉和阳陵泉与同一水平节段的非穴位比较,穴位处的痛阈值明显低于非穴位(P<0.05);下巨虚同一水平节段的穴位下巨虚、外丘、阳交、飞扬、漏谷与同一水平节段的非穴位比较,穴位处的痛阈值明显低于非穴位(P<0.05);解溪同一水平节段的中封、商丘、解溪、申脉相比较,解溪穴的痛阈值最高(P<0.05);分布于趾间的荥穴之间比较,侠溪穴和大都穴的痛阈值较高(P<0.05);位于足少阴肾经的水泉、太溪、筑宾和足太阴脾经的漏谷之间比较,漏谷的痛阈值最高,水泉次之(P<0.05)。结论:穴位的痛阈值明显低于非穴位,且穴位之间的痛阈值也存在差异,表明穴位确实具有相对特异性,从而为临床选穴规范化提供了依据。     

针刺足阳明胃经特定穴与非特定穴治疗功能性消化不良疗效比较

目的:比较针刺足阳明胃经特定穴、非特定穴以及非经非穴点治疗功能性消化不良(FD)不同评价时点的临床疗效差异,探讨经穴效应差异性。方法:将116例患者随机分为足阳明胃经特定穴组(A组)36例、足阳明胃经非特定穴组(B组)39例和非经非穴组(C组)41例。A组针刺冲阳、丰隆、足三里、梁丘,B组针刺条口、阴市、伏兔、犊鼻,并均沿穴位所在经络近心端约2mm位置设置辅助针刺点进行浅刺。C组针刺4个非经非穴点:①肘内侧,肘尖与腋窝连线中点;②肱骨内上髁与尺骨腕部之间中点;③臂内前缘三角肌和二头肌交接处;④足三里水平旁开1～2cm,胫骨外侧缘处,并沿非经非穴点所在肢体纵轴线体表投影在非经非穴点近心端约2mm位置设置辅助针刺点进行浅刺。各组针刺点及其旁开的辅助针刺点均接韩氏穴位神经刺激仪,均治疗4个疗程。治疗后、治疗后1个月、3个月随访观察各组功能消化不良症状积分(FDI)、健康相关生活质量评分(SF-36)情况,并评定临床疗效。结果:治疗后A组餐后饱胀、早饱感、上腹痛、上腹烧灼感症状的总有效率分别为84.8%(28/33)、67.7%(21/31)、76.9%(20/26)、56.3%(9/16),B组分别为45.9%(17/37)、38.7%(12/31)、42.9%(12/28)、38.5%(5/13),C组分别为15.8%(6/38)、18.4%(7/38)、46.1%(12/26)、16.7%(4/24),A组在餐后饱胀、早饱感、上腹痛3个症状方面总有效率均优于B组(均P<0.05);A组在餐后饱胀、早饱感、上腹痛、上腹烧灼感4个方面总有效率均优于C组(均P<0.05);B组在餐后饱胀症状方面总有效率亦优于C组(P<0.05)。各组FDI评分、SF-36评分在治疗后、1个月随访、3个月随访时点较治疗前均明显改善(均P<0.05);A组在以上各时点FDI评分、SF-36评分较其他两组改善更明显(均P<0.05);B组在治疗后2项评分也较C组改善明显(均P<0.05)。结论:针刺足阳明胃经特定穴、足阳明胃经非特定穴与针刺非经非穴治疗FD均有效,而针刺足阳明胃经特定穴治疗FD具有更好的近期和远期疗效,证实了经穴特异性效应的存在。     

针刺对部分切断背根猫备用背根节c-fos表达的影响

目的 :探讨针刺对部分切断背根猫备用背根节c fos表达的影响 ,为了解c fos与针刺促进脊髓可塑性的关系奠定基础。方法 :取成年健康雄性猫 10只 ,随机分 2组 :手术 7d组及针刺备用根 7d组 ,每组 5只动物。取各组术侧L6 背根节于 -2 0℃恒冷切片机上连续切片 ,片厚 2 0 μm ,分别用兔抗c fos( 1∶10 0 0 )抗体行免疫组化ABC法染色。观察并测量各组背根节中c fos蛋白的分布和单位面积c fos阳性神经元数。进行两样本均数比较的t检验。结果 :针刺备用根后 ,备用背根节中的c fos阳性神经元数与手术组比显著增加 (P <0 .0 5)。结论 :针刺备用根后c fos在备用背根节表达增加 ,提示c fos可能在针刺促进脊髓可塑性中发挥作用。     

电针大鼠“四白”穴和胃扩张传入信息在孤束核的汇聚——c-fos表达的研究

目的:探讨电针足阳明经“四白”穴和胃扩张刺激诱导大鼠孤束核(NTS)的原癌基因c -fos表达及意义。方法:将SD大鼠随机分为4组:电针“四白”穴组、电针“四白”穴旁开0 .5cm组、胃扩张模型组和空白对照组。采用免疫组织化学方法观察c- fos在孤束核的表达。结果:电针“四白”穴组和胃扩张模型组孤束核内Fos样免疫反应(FLI)阳性神经元均主要分布于内侧亚核,以延髓的中尾段分布较多;电针“四白”穴组在内侧亚核内FLI神经元数目与胃扩张模型组比较无明显差异(P >0 .0 5 ) ,与“四白”穴旁开组比较,差异有非常显著性意义(P <0 .0 1 )。结论:电针“四白”穴和胃扩张刺激的感觉传入可能在孤束核发生汇聚、整合,是针刺“四白”穴调节胃功能的中枢途径之一。     

电针“曲池”“足三里”“神门”对自发性高血压大鼠血压及血管紧张素Ⅱ、醛固酮及心钠素的影响

目的:通过观察电针不同穴位对自发性高血压大鼠(SHR)血压及血浆血管紧张素Ⅱ(AngⅡ)、醛固酮(ALD)及心钠素(ANP)的影响,探讨不同穴位对SHR血压影响的规律及可能机制。方法:雄性SHR60只随机分为模型组、曲池组、足三里组、神门组、肩髃组及尾尖组,每组10只。10只同体重Wistar大鼠作为正常组。分别电针"曲池"足三里"神门"肩髃"及尾尖,连续波,频率2Hz,强度2mA,电针30min。使用无创血压测量系统检测针刺前后各组大鼠收缩压和舒张压,放射免疫法检测血浆AngⅡ、ALD及ANP含量。结果:曲池组、足三里组、神门组收缩压及舒张压较针刺前及模型组均明显降低(P<0.05);肩髃组、尾尖组收缩压及舒张压与针刺前及模型组比较,差异均无统计学意义(P>0.05);曲池组和神门组治疗后收缩压低于肩髃组和尾尖组(P<0.05);曲池组、足三里组及神门组舒张压较肩髃组及尾尖组显著降低(P<0.05)。模型组血浆AngⅡ显著低于正常组,血浆ALD水平显著高于正常组(P<0.05);曲池组、足三里组、神门组血浆AngⅡ及足三里组、神门组ALD水平与模型组比较显著下降(P<0.05);神门组血浆AngⅡ及ALD水平低于尾尖组(P<0.05)。模型组血浆ANP水平显著低于正常组(P<0.05);治疗后神门组血浆ANP水平显著高于模型组和肩髃组(P<0.05)。结论:电针"曲池"神门"足三里"可以即刻降低SHR血压,其降压作用可能与对血浆AngⅡ、ALD及ANP的调整作用有关,并有一定的穴位特异性作用。     

THE EXTENSIVENESS AND SPECIFICITY OF EFFECT OF ELECTROACUPUNCTURE AT DIFFERENT ACUPOINTS ON NOCICEPTIVE RESPONSE OF CONVERGENT NEURONS IN TRIGEMINAL NUCLEUS CAUDALIS

Experiments were carried out on rats anaesthetized with uraethane. The sponta-neous discharges and nociceptive responses of convergent neurons in the right trigerninal nucleus cau-dalis(TNC) to noxious stimuli at receptive field (cheek) were recorded extracellularly with glass mi-cro-electrode. Electroacupuncture (EA ) was applied at bilateral " Xiaguan" (ST 7 on face ) or "Zusanli" (ST 36 on shank) acupoint with Iow (2V) and high (18V) intensity. The noclceptive re-sponse of convergent neurons in TNC could be inhihited by low intensity EA applied at "Xiaguan" butnot "Zusanlil", showing the specificity of acupoints. High intensity EA at either "Xiaguan" or "Zusan-li" also reduced the nociceptive responses, showing the analgesic extensiveness of acupoints. We sug-gest that "the gate of control" mechanism plays a main role in low intensity EA and "diffuse noxiousinhibitory controls" (DNIC) rnechanism does so in high intensity EA.The results suggest that we should pay attention to the location of acupoints,     

电针对下丘脑后区神经元放电的影响

<正> 实验用成年杂种家兔,观察了电针“内关”、“足三里”和尾部非穴点对下丘脑后区(PHA)神经元电活动的影响。 1.电针“内关”后,31个PHA神经元被兴奋者16个(51.6％),被抑制者10个(32.3％),这两种效应具有很好的重复性,有5个没有明显变化。     

大鼠头面部腧穴和胃扩张传入信息在孤束核的汇聚-c-fos表达的研究

目的 探讨电针大鼠头面部腧穴和胃扩张刺激诱导大鼠孤束核(Nucleus of Solitary Tract,NTS)的原癌基因c-fos表达及意义。方法 将SD大鼠随机分为6组:电针“四白”穴组、电针“四白”穴旁开组、电针“颊车”穴组、电针“颧髎”穴组、胃扩张模型组和空白对照组。采用免疫组织化学方法观察c-fos在NTS的表达。结果 电针“四白”穴组和胃扩张模型组NTS内均有较多的FOS样免疫反应(FLI)阳性神经元表达,且主要分布于内侧亚核(mNTS),并以延髓中尾段分布较多,其余亚核内较为稀疏,两组的FLI阳性神经元数目在mNTS比较,P>0.05;电针“颧髎”穴组和电针“颊车”穴组亦有一定数量的FLI阳性神经元表达;电针“四白”旁开组有少量FLI阳性神经元表达;空白组只有正常状态下的低FLI阳性神经元表达。结论 电针“四白”穴和胃扩张模型在mNTS内大量的FLI阳性神经元表达,两者的高表达提示来自电针“四白”穴和胃扩张刺激的感觉传入可能会在NTS发生汇聚、整合,从而影响胃的机能状态;此外,亦在形态学上为经脉脏腑相关跨神经节的初级中枢联系机制提供部分合理的解释。     

电针对内毒素引起大鼠肝损伤保护作用的研究

目的：观察电针足三里能否减轻内毒素引起的大鼠肝损伤,并初步探讨其作用机制。方法：雄性Wistar大鼠40只随机分为4组：内毒素组、电针组、正常组和非穴组。尾静脉注射内毒素（5 mg/kg）制作大鼠肝损伤模型,正常组注射等量生理盐水;电针组于造模半小时后给予电针“足三里”治疗（2～100 Hz,2 mA,1.5 h）,非穴组针刺位置为“足三里”旁开5 mm、下5 mm,操作同电针组。结果：尾静脉注射内毒素可显著增加大鼠肝组织TNF-α含量和血浆ALT活性,电针可使两者明显降低（P〈0.01）,非穴组大鼠肝组织TNF-α含量和血浆ALT活性与内毒素组相比差异无统计学意义（P〉0.05）。结论：电针“足三里”可降低内毒素引起的异常升高的大鼠肝组织TNF-α含量和血浆ALT活性,具有器官保护作用,其机制可能与降低肝组织TNF-α含量有关。     

电针足三里穴对肠鸣音影响的初步观察

目的观察针刺足三里穴对肠鸣音的影响。方法应用自行研制的计算机肠鸣音采集记录系统,检测23名健康成人志愿者在电针足三里穴前后肠鸣音的变化。结果针刺对肠鸣音的影响是双向的,可使肠鸣音发生明显变化。与电针前比,电针对肠鸣音的影响经统计学处理,具有非常显著差异（P〈0.01）。结论针刺足三里穴对人体肠鸣音可产生显著的影响,提示针刺足阳明胃经局部穴位对胃肠运动具有一定的影响作用。     

Influence of electroacupuncture at acupoints Zusanli(ST 36) and Taichong(LR 3) with different frequencies on rats swimming endurance

目的:观察不同频率的电针对大鼠游泳耐力影响,筛选出最佳频率参数.方法:选用Wistar大鼠,以大鼠负重游泳时间为指标,分为对照组、非穴组、电针低频,中频和高频组(2Hz组、15Hz组、100Hz组),取足三里、太冲穴,观察针刺前后游泳耐受时间的变化.结果:针刺后,15Hz和100Hz组游泳时间有增加,针刺前后有显著性差异(P＜0.05);且15 Hz组游泳时间升高的百分率与其他组相比有显著性差异(P＜0.05).结论:提示足三里、太冲穴给予频率为15 Hz的电针具有提高大鼠游泳耐力效应,15 Hz电刺激可能是所要筛选的最佳频率参数.