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1.
The Washington Psychosocial Seizure Inventory (WPSI) was translated from English into Spanish, reviewed by a bilingual panel, and then standardized on 107 Spanish-speakers and 45 bilinguals in Miami, Florida. The 152 subjects were active clients of the Epilepsy Foundation of South Florida. Subjects were assigned to one of three treatment groups: Monolingual (Spanish WPSI only), Bilingual (Spanish WPSI first), or Bilingual (English WPSI first). All three groups were given two administrations of the WPSI at least 30 days apart. Resulting data were submitted to measures of split-half reliability, test-retest reliability, and concurrent validity. The psychosocial scales were found to be internally consistent and showed stability across administrations with a marked similarity between the Spanish and English forms. The concurrent validity of the Spanish scales was established at the 0.01 level of significance or better. It was concluded that the Spanish WPSI was statistically comparable to the original English language version, thus establishing a basis for its usage in the psychological assessment of Spanish-speaking epileptics throughout the world.  相似文献
2.
Felbamate (FBM, 2-phenyl-1,3-propanediol dicarbamate), a potential antiepileptic drug (AED), has an unknown mechanism of action. We examined possible interaction of FBM with GABAA ergic transmission. FBM did not alter specific binding of ligands to GABA. benzodiazepine, and picrotoxin sites of the oligomeric GABAA receptor complex to rat brain membranes, nor did it enhance the effect of GABA on 36Cl-influx in well-characterized cultured spinal cord neurons. These results suggest that the anticonvulsant effect of FBM does not involve GABAA ergic transmission.  相似文献
3.
目的探索从成年大鼠中枢神经系统(CNS)不同区域是否能分离培养出NG2蛋白聚糖阳性神经祖细胞(NG2细胞)。方法从成年雌性大鼠解剖出CNS的9个不同区域,分别经木瓜蛋白酶消化和Optiprep不连续梯度离心,从离心产生的组织细胞密集带,用含B27添加剂和碱性成纤维细胞生长因子2(FGF2)的NeurobasalA培养液,分离培养出增殖性细胞,再以免疫荧光双重染色法鉴定细胞性质。结果应用上述方法,可从成年大鼠CNS的9个不同区域分离出具神经干细胞(NSCs)潜能的NG2细胞。结论成年大鼠CNS的非神经发生区域同样存在NSCs样细胞,且可通过适当方法体外培养。  相似文献
4.
目的 观测U251细胞的克隆在形态和分化上的差异,鉴定含胶质瘤于细胞的克隆.方法 克隆形成实验观察U251细胞克隆的形态并分类,免疫细胞化学染色观测不同克隆GFAP和nestin的表达差异.分离低分化克隆,检测其自我更新能力、多向分化潜能及CD133表达情况.结果 U251细胞可形成紧密型、中间型和松散型三种克隆类型.紧密型克隆分化程度最低,此克隆在无血清培养基内形成神经干细胞样细胞球,具有自我更新能力、多向分化潜能,并表达CD133.结论 U251细胞的克隆在形态和分化程度上存在差异,紧密型克隆可能富含胶质瘤干细胞.  相似文献
5.
Summary: Valproic acid has recently been shown to be associated with liver disease in man. Rat hepatocyte cultures were used to test the hepatotoxicity of valproic acid and several other anticonvulsants. Dose-related hepatotoxicity was demonstrated for valproic acid at concentrations ranging from 10 to 320 /ig/ml, therapeutic concentrations being 50–100 μg/ml. Hepatotoxicity could not be demonstrated for phenobarbital, phenytoin, primidone, and clonazepam. It is concluded that valproic acid is a dose-related hepatotoxin.  相似文献
6.
成人骨髓间充质干细胞的体外培养和定向神经分化   总被引:1,自引:1,他引:0  
目的 探讨成人骨髓间充质干细胞(MSCs)的体外培养和定向神经诱导分化的条件.方法 从正常成人志愿者髂骨中分离获取MSCs,体外培养扩增纯化后传代于塑料培养皿中,以含有脑源性生长因子(BDNF)联合维A酸(RA)的培养液对传至3~5代的细胞进行体外诱导分化,采用免疫细胞化学法对诱导后的细胞鉴定.结果 诱导1h有部分细胞表达神经干细胞标志巢蛋白nestin,6h后大部分细胞具有典型神经元形态.表达神经元特异性烯醇化酶(NSE)阳性细胞占细胞总数的(46.45±2.54)%.结论 MSCs可通过体外培养并纯化,应用BDNF联合RA可以在体外诱导MSCs成为神经元样细胞.  相似文献
7.
小胶质细胞和少突胶质细胞前体的培养和鉴定   总被引:1,自引:1,他引:0  
目的 探讨新生大鼠脑组织小胶质细胞(MG)和少突胶质细胞(OL)前体的分离和体外培养方法 . 方法 取新生2 d SD大鼠脑组织,体外原代培养混合胶质细胞7 d后,分别采用"改良振荡伴差速贴壁"法和"营养缺失伴振荡"法纯化培养MG和OL前体,并分别应用免疫荧光染色异凝集素-B4(IB4)和OL前体标记物(O4)进行鉴定.结果 混合胶质细胞培养7 d后呈明显三层增长,其中MG位于上层,星型胶质细胞位于底层,两者之间为2型少突星型(O2A)祖细胞.纯化培养后OL前体胞体呈小圆形,有双极或三极突起,MG则以阿米巴形、圆形居多,或边缘呈毛刺状.免疫荧光染色IB4显示绿色荧光,MG纯度达到90%以上.免疫荧光染色O4显示棕黄色荧光,OL前体纯度达到95%以上. 结论 采用"改良振荡伴差速贴壁"法以及"营养缺失伴振荡"法分别成功获取大量纯度高、活力好的MG和OL前体.  相似文献
8.
Bath application of low concentrations of opioid peptides and higher concentrations of opiates increased the amplitude and duration of excitatory postsynaptic potentials of pyramidal cells and induced long-lasting depolarization shifts. These actions were reversible and blocked by the opiate antagonist naloxone. Synaptic isolation of the cells by exposure of the cultures to 8 mM Mg2+ not only abolished all spiking and synaptic activity, but also obliterated the peptide effects on pyramidal cells, although these cells were still excited by bath-applied glutamate. The opioid peptides had no detectable effect on resting membrane potential and on the input resistance of the penetrated cells. Experiments in which pyramidal cells were synaptically activated by field stimulation provided direct evidence for a disinhibitory action of the peptides.  相似文献
9.
Effects of Phenytoin on Primary Glial Cell Cultures   总被引:1,自引:1,他引:2  
The activity of enzymes involved in anion and cation transport, the concentration of intracellular potassium (K+i), and the transmembrane potential (Em) were determined following acute and chronic exposure of primary astroglial cultures to micromolar concentrations of phenytoin (PHT). Na+, K+-ATPase activity of homogenates of cultured glial cells was determined in the presence of an increasing K+ concentration (1-20 mM). Acutely, PHT had little effect on the K+ activation pattern of Na+, K+-ATPase. In contrast, the percentage of Na+, K+-ATPase activated by elevating the K+ concentration was dose dependently increased by chronic PHT treatment. This effect was accompanied by a marked increase in K+i and a significant membrane hyperpolarization. The acute effect of PHT on the Em was biphasic, characterized by membrane hyperpolarization at concentrations of 10(-6)-10(-5) M; at concentrations between 10(-5) and 10(-4) M, the Em progressively returned to control values. These results suggest that glial cells acutely and chronically treated with therapeutic concentrations of PHT have an enhanced capacity to control elevated extracellular potassium levels. Return of the Em to control values at PHT concentrations greater than 10(-5) M suggests that these cells are less able to regulate extracellular potassium. These data can partially explain the excitatory effects of PHT at high therapeutic concentrations.  相似文献
10.
Dextromethorphan: Cellular Effects Reducing Neuronal Hyperactivity   总被引:1,自引:1,他引:4  
G. Trube  R. Netzer 《Epilepsia》1994,35(S5):S62-S67
Summary: Dextromethorphan is a dextrorotary morphinan without affinity for opioid receptors, commonly used as an antitussive medication. During the past 5 years, interest in the compound and its demethylated derivative, dextrorphan, has been revived because additional neuroprotective and an-tiepileptic properties were found in in vitro studies, animal experiments, and a few clinical cases. Both morphinans are able to inhibit N -methyl-D-aspartate (NMDA) receptor channels and voltage-operated calcium and sodium channels with different potencies. The inhibition of the NMDA receptor is believed to be the predominant mechanism of action responsible for the anticonvulsant and neuroprotective properties of the compounds.  相似文献
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