共查询到19条相似文献,搜索用时 156 毫秒
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Objective: To investigate the influence of acupuncture parameters on the acupuncture effect through the cluster analysis in Wistar rat model with middle cerebral artery occlusion (MCAO). Methods: Duplicated MCAO models by Zea-longa's thread ligation and chose rats with 1-3 scores assessed by Zausinger's six-score method to be grouped. The rats were divided into 6 basic control groups [(including a normal group, a sham group, a model control group, a model group without intervention, a Nimodipine group, a lateral-to-Renzhong (DU6) group] and 6 acupuncture groups [a Neiguan (PC6) group, a Weizhong (BL40) group, a Sanyinjiao (SP6) group, a Chize (LU5) group, a Renzhong (DU6) group and a Feixue (non-acupoint) group]. In the acupuncture groups, for every acupoint or needling site, 9 different parameters [2 factors (frequency and time) and 3 levels (180, 120, and 60 cpm of the frequency and 5, 60, and 180 s of the time)] were set respectively by the orthogonal intersection method, in total 54 groups. The rats were treated by acupuncture with a lifting-thrusting manipulation once every 12 h, in total 6 times. Neurobehavioral scores, cerebral blood flow, infarction rate, microcirculation, light microscopy, etc. were measured. The factor analysis was first applied to get the comprehensive effect scores of the samples in the acupuncture groups and then by which the cluster analysis was made with the statistical software of SPSS17.0. Results: For the Neiguan (PC6) group, the exceptional results of acupuncture comprehensive effect were parameters 7, 8, 9, 10; the valid results were parameters 2, 3, 4, and the invalid were parameters 5, 6. For the Weizhong (BL40) group, the exceptional results were parameters 2, 4; the valid results were parameters 3, 5, 6, 7, and the invalid were parameters 8, 9, 10. For the Chize (LU5) group, the exceptional results were parameters 7, 8; the valid results were parameters 3, 4, 5, 6, 9, 10; and the invalid was parameter 2. For the Sanyinjiao (SP6) group, the exceptional results were parameters 4, 6; the valid results were parameters 2, 3, 5; and the invalid were parameters 7, 8, 9,10. For the Renzhong (DU6) group, the exceptional results were parameters 3, 4, 6, 7, 9, 10; the valid results were parameters 2, 5; and the invalid was parameter 8. For the Non-acupoint group, the exceptional result was parameter 10; the valid results were parameters 2, 3, 4, 7, 9; and the invalid were parameters 5, 6, 8. Conclusions: For each meridian acupoint, different acupuncture parameters could consequently get a different acupuncture effect; each meridian acupoint had the most suitable or optimal acupuncture parameters; acupuncture parameters might be the main factors impacting on acupuncture effect. 相似文献
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目的:通过综合评价急性脑梗死大鼠模型的针刺效应来研究经穴效应的特异性。方法:以Zea-longa线拴法复制大脑中动脉缺血(MCAo)大鼠模型。造模成功后依据Zausinger六分法选择1-3分的大鼠入组。以随机对照设计原则设立基础对照组(正常组、假手术组、模型对照组、模型未干预组、尼莫地平组、人中旁组)和针刺组(内关组、委中组、三阴交组、尺泽组、人中组和非穴组)。而且针刺组内每个穴组采用正交设计法分别设置9个不同参数组合。每组12只,共60组。针刺干预组以提插手法针刺治疗,每12h1次,共干预6次。并以神经行为学、脑血流、梗死率、微循环、光镜等为测量指标。利用因子分析计算样本的综合得分,并进行排序比较(以SPSS17.0实现)。结果:针刺组内比较:每个经穴的针刺参数组合不同,则针刺效应亦不同。针刺组间比较:内关〉尺泽〉人中〉三阴交〉委中〉非穴。经穴与非穴比较:穴位组〉非穴组。针刺组与非针刺组比较:针刺组〉非针刺组。结论:经穴具有针刺效应的特异性;而且经穴特异性是相对的。 相似文献
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Acupuncture point specificity is the theoretical basis for meridian and acupuncture theory. Also it is the key factor for the efficacy of acupuncture treatment. Studies on acupoint specificity have aroused wide interest in scholars both at home and abroad. Some researchers abroad do not support acupoint specificity. Chinese scholars have, after years of research, preliminarily confirmed the existence of acupoint specificity. However, there is still no conclusive evidence to support acupoint specificity in terms of its specific physiological foundation, underlying mechanism and laws. This paper summarizes and analyzes basic and clinical researches on acupoint specificity in biological structure, physiology and acupoint effect, provides clues for further studies and develops the theoretical basis for acupont specificity. 相似文献
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健康雄性大鼠54只,随机分为不同激光功率的4个组和捆绑、空白对照组。大鼠捆绑于鼠台,每天用激光照射右“足三里”10min,第6天实验后,取空、回肠系膜铺片,醛品红—橙黄G染色,10×40倍光镜作镜检。结果发现,除40mW激光组出现抑制效应外,激光照射使肥大细胞数量升高,接近正常水平,肥大细胞脱颗粒率增加。此种变化尤以5mW和20mW激光作用最佳。激光照射“足三里”的作用,空肠优于回肠。 相似文献
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目的:探讨穴位的特异性效应及针刺频率对其特异性的影响作用。方法:Wistar成年雄性大鼠132只,随机分为正常组、模型空白组和针刺组,针刺组又随机分为非穴组和“醒脑开窍”针刺法各主穴组,即水沟组、内关组、尺泽组、三阴交组和委中组。复制大鼠大脑中动脉缺血模型(MCAO),分别对以上穴区以及非穴区,施以频率2次/s、持续时间5s的针刺干预,观察脑血流量的变化。结果:当针刺频率为2次/s、持续时间5s时,针刺组(包括非穴组与“醒脑开窍”针刺法各主穴)与模型空白组比较,脑血流均有不同程度提高,内关组、委中组与模型空白组、非穴组比较具有统计学意义(P〈0.05)。结论:穴位具有特异性,其特异性受针刺参数影响;醒脑开窍针刺法能取得较好的临床疗效,是不同穴位及其最佳针刺参数共同作用的结果。 相似文献
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目的 观察穴位贴敷配合针灸治疗小儿过敏性鼻炎的临床疗效。方法 选取过敏性鼻炎患儿90例,随机分为对照组及治疗组,45例给予地氯雷他定干混悬剂(对照组),45例采用穴位贴敷配合针灸治疗(治疗组),观察治疗前及治疗半年后的临床症状评分,评价临床疗效。结果 两组治疗后症状均有改善,但治疗组明显高于对照组,差异具有统计学意义(P<0.05)。结论 穴位贴敷配合针灸治疗小儿过敏性鼻炎,具有一定的临床疗效,可作为治疗过敏性鼻炎的选择。 相似文献
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目的:用大鼠杏仁核点燃模型研究针刺对点燃进程的影响。方法:对模型大鼠选取大椎(DU14)针刺10 d后,每日针刺并电刺激大鼠右侧杏仁核各1次。观察各组Racine’s分级和后放电时程(ADD)。结果:针刺组大鼠的ADD低于空白对照组和假针刺组(P<0.05),而且针刺大椎可明显延缓大鼠的Ⅴ级大发作(P<0.01)。结论:针刺对预防癫痫发展有重要作用。 相似文献
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穴位埋线对实验性癫痫大鼠脑电图的影响 总被引:3,自引:0,他引:3
【目的】探讨穴位埋线法对实验性癫痫大鼠脑电图的影响。【方法】将50只大鼠随机分为空白组、模型组、埋线组、西药组(剂量为15 mg/kg丙戊酸钠)、针刺组,分组进行预处理后,以腹腔注射青霉素钠(570万U/kg)复制大鼠癫痫模型,观察各组造模后70~85 min内脑中线Fz区与Pz区脑电图电压、频率的变化。【结果】模型组Fz区与Pz区的电压高于空白组(P<0.01),而埋线组、西药组、针刺组的电压均低于模型组(P<0.05或P<0.01);模型组造模后脑电频率A变慢,而埋线组、西药组、针刺组的频率A均比模型组增快,其中埋线组最快,对频率A的影响以Pz区明显(P<0.05或P<0.01);模型组造模后Fz区与Pz区脑电频率B也变慢,埋线组和针刺组频率B均增快(P<0.05或P<0.01),西药组频率B增快不明显(P>0.05)。【结论】穴位埋线、针刺和西药丙戊酸钠均可降低癫痫大鼠痫性放电电压、增快脑电频率,具有抗痫作用。但与单纯针刺相比,穴位埋线可延长穴位刺激效应时间,减少治疗频率,而与西药治疗相比则可避免西药的毒副作用。 相似文献
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目的研究针刺雌性大鼠身体各部位不同穴位对下丘脑促性腺激素释放激素(GnRH)相关神经元活动的影响,以比较身体各部位不同穴位对这类神经元活动的有效性,为针刺治疗生殖内分泌系统疾病提供实验依据。方法用玻璃微电极细胞外记录下丘脑内视前内侧区、弓状核及室旁核区域的GnRH相关神经元放电,以该神经元放电为指标,探察针刺身体不同部位的15个穴位对神经元的激活效应及激活强度的差异。结果针刺15个穴位前后兴奋性神经元放电变化百分率从大到小的排列顺序为:子宫、关元、带脉、三阴交、耳甲、足三里、下关、关元俞、肾俞、中脘、曲池、合谷、内关、肝俞、膻中;从针刺部位来看有明显变化的是:下腹部、后肢、下背部。针刺对抑制性神经元的影响同兴奋性神经元的结果基本一致。结论针刺能有效调节下丘脑-垂体-性腺内分泌轴的活性,但不同穴位的调节作用不同。穴位的调节作用与其所处部位的神经节段支配密切相关,与生殖器官同节段支配的穴位其激活下丘脑中GnRH相关神经元的作用最强。 相似文献
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目的对电凝制作大鼠脑卒中模型方法进行改良及评价。方法将26只成年雄性SD大鼠(体质量200~300 g)分成5组:Tamura手术组、Tamura假手术组、改良手术一组、改良手术二组、改良假手术组。分别使用Tamura法和改良电凝法制作脑卒中模型。术后对大鼠神经功能缺损,脑梗死面积和部位进行评价。结果与Tamura法比较,改良电凝法手术时间更短,术后大鼠没有出现颞下颌关节紊乱;改良手术一组大鼠没有出现明显的神经功能缺损,改良手术二组大鼠肢体瘫痪比较明显;改良手术一组大鼠脑梗死面积比较小,梗死范围局限于大脑皮层,改良手术二组梗死面积较大,梗死部位在基底节测区和大脑皮层。结论①改良电凝法更加简便快速,对设备和操作技术要求更低,对大鼠其他损伤更小。②使用改良电凝法阻断大脑中动脉的不同部位,可以实现不同面积和部位的脑梗死、满足不同的实验条件和目的。 相似文献
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LU Shan-shan LIU Sheng ZU Qing-quan XU Xiao-quan WANG Jian-wei YU Jing SUN Lei SHI Hai-bin 《中华医学杂志(英文版)》2013,126(2):311-317
Background A new lacunar infarction model was recently established in beagle dogs through proximal middle cerebral artery (MCA) occlusion by thrombus. This study aimed to characterize the model by multimodal magnetic resonance imaging (MRI) and to investigate its potential role for the future stroke research.
Methods The left proximal MCA was embolized with an autologous thrombus in six beagles. Diffusion-weighted imaging (DWI) and T2-weighted imaging (T2WI) were performed every half hour during the first six hours after occlusion, followed by three time points at 12 hours, 24 hours, and one week. Perfusion-weighted imaging (PWI) and magnetic resonance angiography (MRA) were carried out at six hours, 24 hours and one week. The PWI-DWI mismatch ratio was defined as (PWI-DWI)/DWI ischemic volume.
Results Lacunar infarcts induced by MCA occlusion were located in the left caudate nucleus and internal capsule. All the lesions could be detected within two hours by DWI. Lesion volume on DWI increased in a time dependent manner, from (87.19±67.16) mm3 at one hour up to (368.98±217.05) mm3 at 24 hours (P=0.009), while that on PWI gradually decreased from (7315.00±2054.38) mm3 at six hours to (4900.33±1319.71) mm3 at 24 hours and (3334.33±1195.11) mm3 at one week (P=0.002). The mismatch ratio was 41.93±22.75 at six hours after ischemia, showing “extensive mismatch”, and decreased to 18.10±13.74 at 24 hours (P=0.002). No MCA recanalization was observed within 24 hours after MCA occlusion.
Conclusions Lacunar infarction induced by proximal MCA occlusion could be detected early by DWI and was characterized by extensive PWI-DWI mismatch. Multimodal MRI is useful to demonstrate the natural evolution of PWI-DWI mismatch. This ischemic model could be further used for investigating early thrombolysis in lacunar stroke showing extensive mismatch.
相似文献
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目的:观察葡萄糖胺对脑缺血再灌注损伤的保护作用,为其临床应用提供实验依据。方法:应用HT22细胞缺糖缺氧模型(oxygen-glucose dexprivation model,OGD),观察葡萄糖胺对细胞活性和乳酸脱氢酶释放率的影响。制备小鼠大脑中动脉栓塞模型(middle cerebral artery occlusion,MCAO),缺血2 h拔线再灌注前尾静脉注射葡萄糖胺(0.1、0.2、0.4 g/kg),再灌注24 h后进行神经学评分,测定脑梗死面积和脑含水量等短期药效评价。葡萄糖胺灌胃给药1 g/(kg.d)共24 d后,计算小鼠生存率以及进行爬杆测试评价肢体协调能力。结果 :葡萄糖胺(0.1~0.8 mmol/L)显著增加缺糖缺氧的HT22细胞的活性(P<0.05)。尾静脉注射葡萄糖胺(0.2、0.4 g/kg)能显著减小小鼠脑梗死面积,降低脑含水量并改善神经症状(P<0.05),连续灌胃给药后能显著增强小鼠肢体协调能力(P<0.05),但对动物死亡率无显著影响。结论:葡萄糖胺对脑缺血再灌注损伤具有保护作用。 相似文献
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目前局灶性脑缺血动物模型最常用的方法是大脑中动脉线栓法(MCAO),但该方法仍存在技术要求高、模型差异性大、动物死亡率高等缺陷.因此,如何建立稳定、可靠、重复性高的MCAO动物模型成为我们亟需解决的问题.从实验动物、麻醉药物、栓线的选择,手术流程、术后护理等多个方面进行探讨,以期提高MCAO脑缺血动物模型的成功率. 相似文献
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本研究用S-D大鼠,在其一侧筛孔(EF)处切断支配脑血管的副交感神经舒血管神经,看是否能增加该侧大脑中动脉栓塞后脑梗塞的体积。脑梗塞体积的测量在栓塞后24h由6层切面之和求得。4组动物中除D组(假手术组)未见到梗塞外,其余3组的(A组为神经切断加大脑中动脉栓塞;B组为暴露出神经但未切断大脑中动脉栓塞,C组为单纯大脑中动脉栓塞)梗塞体积(平均数±标准差)分别为(153±42)mm3、(147±42)mm3和(148±45)mm3,方差分析结果,无差别(P>0.05)。同时也没有看到各组间梗塞部位的差别。本研究未能证实副交感神经纤维在脑缺血这一病理生理过程中的作用。 相似文献
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目的 观察前列地尔治疗急性大脑中动脉闭塞性脑梗死患者的临床疗效.方法 将112例经脑血管造影证实为大脑中动脉闭塞性所致的急性脑梗死患者随机分为两组,对照组55例,采用常规治疗;治疗组57例,在常规治疗基础上加用前列地尔脂微球载体制剂10μg,静脉点滴,1次/d,14d为一疗程.评价治疗前后神经功能缺损评分的变化及疗效,监测用药前后脑出血等并发症的发生情况及凝血功能、肝肾功能的变化.结果 治疗组治疗后14d、28d NIHSS评分较对照组明显减少,差异有统计学意义(P〈0.05);两组治疗后BI评分均较治疗前增加(P〈0.05),治疗组治疗后BI评分增加较对照组差异有统计学意义(P〈0.05);两组治疗后ADL评分均减少(P〈0.05),治疗组治疗后ADL评分减少较对照组差异有统计学意义(P〈0.05);两组不良事件发生情况无明显差异.结论 大脑中动脉闭塞所致的急性脑梗死患者病情较重,治疗效果差;前列地尔脂微球载体制剂治疗颅内动脉狭窄所致的急性脑梗死患者安全有效. 相似文献
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目的观察针灸对脑梗死大鼠血液流变学的影响及其与学习记忆的关系,从血液流变学角度探讨针灸对脑梗死大鼠学习记忆能力、中枢神经系统的可塑性影响及其可能机制。方法选健康雄性Wister大鼠80只,制成右侧大脑中动脉缺血梗死模型,成功48只,随机分为两组:脑梗死自由活动组(对照组)和脑梗死针灸组(针灸组),每组各24只。用Y-迷宫测试学习记忆能力;用血流变测试仪测试血液流变学指标。结果针灸组大鼠学会Y-迷宫所花的次数明显少于对照组(P〈0.05);针灸12、周组大鼠全血粘度(ηb)高切、中切、低切,血浆粘度(ηp),血细胞比容(HCT),红细胞聚集指数(EAI)等指标均较对照同期组明显改善(P〈0.05)。结论①针灸能降低脑梗死大鼠全血粘度、血浆粘度、红细胞比容和红细胞聚集指数,增加海马局部血流量,海马最终得以保存更多神经元而发挥其改善学习记忆功能的作用;②针灸能明显改善脑缺血大鼠的学习记忆能力。 相似文献
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目的 探讨益智开窍针刺法结合穴位注射对脑性瘫痪(简称脑瘫)患儿语言障碍、脑血流灌注、脑葡萄糖代谢的影响。方法 选取2015年1月—2018年12月北京中医药大学东直门医院收治的100例脑瘫患儿,随机分为观察组及对照组,每组50例。对照组采用常规语言疗法治疗,观察组采用益智开窍针刺法结合穴位注射治疗,时间3个月。治疗结束后对患儿的语言障碍功能、脑血流灌注及脑葡萄糖代谢改善情况进行评估。结果 观察组治疗后的临床有效率高于对照组(P <0.05),脑血流灌注改善患儿多于对照组(P <0.05),额叶、顶叶、颞叶及枕叶部葡萄糖代谢水平高于对照组(P <0.05)。结论 采用益智开窍针刺法结合穴位注射治疗后可显著提高脑瘫患儿临床疗效,并改善患儿脑血流灌注情况,提高脑葡萄糖代谢水平。 相似文献
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【目的】利用MCAO模型大鼠研究厄贝沙坦(IRB)、阿司匹林(ASP)在脑卒中后对脑组织的影响。【方法】雄性Wistar大鼠40只随机分为5组:MCAO,IRB+MCAO,ASP+MCAO,IRB+ASP+MCAO,正常对照。连续给药7 d后,I-IV组行MCAO术,24 h后观察行为、梗塞容积、生化指标,SPSS16.0处理实验数据。【结果】预防性给予IRB、ASP的大鼠与单纯MCAO大鼠比较,自发活动率、抓力、过氧化氢酶水平呈上升趋势,梗塞容积、TBARS水平呈下降趋势(P〈0.05)。【结论】IRB与ASP有改善脑卒中后脑损伤的作用,联合用药效果更为显著。 相似文献