全文获取类型
收费全文 | 23660篇 |
免费 | 2278篇 |
国内免费 | 973篇 |
专业分类
耳鼻咽喉 | 419篇 |
儿科学 | 243篇 |
妇产科学 | 69篇 |
基础医学 | 1351篇 |
口腔科学 | 455篇 |
临床医学 | 6736篇 |
内科学 | 1712篇 |
皮肤病学 | 125篇 |
神经病学 | 3848篇 |
特种医学 | 503篇 |
外国民族医学 | 2篇 |
外科学 | 1354篇 |
综合类 | 1996篇 |
预防医学 | 1712篇 |
眼科学 | 4449篇 |
药学 | 767篇 |
73篇 | |
中国医学 | 827篇 |
肿瘤学 | 270篇 |
出版年
2024年 | 123篇 |
2023年 | 584篇 |
2022年 | 1054篇 |
2021年 | 1536篇 |
2020年 | 1406篇 |
2019年 | 1217篇 |
2018年 | 1178篇 |
2017年 | 1095篇 |
2016年 | 957篇 |
2015年 | 851篇 |
2014年 | 1532篇 |
2013年 | 2407篇 |
2012年 | 1184篇 |
2011年 | 1124篇 |
2010年 | 974篇 |
2009年 | 854篇 |
2008年 | 925篇 |
2007年 | 975篇 |
2006年 | 817篇 |
2005年 | 676篇 |
2004年 | 582篇 |
2003年 | 568篇 |
2002年 | 480篇 |
2001年 | 426篇 |
2000年 | 336篇 |
1999年 | 267篇 |
1998年 | 253篇 |
1997年 | 217篇 |
1996年 | 169篇 |
1995年 | 186篇 |
1994年 | 133篇 |
1993年 | 140篇 |
1992年 | 142篇 |
1991年 | 121篇 |
1990年 | 106篇 |
1989年 | 104篇 |
1988年 | 97篇 |
1987年 | 89篇 |
1986年 | 102篇 |
1985年 | 174篇 |
1984年 | 144篇 |
1983年 | 122篇 |
1982年 | 125篇 |
1981年 | 106篇 |
1980年 | 95篇 |
1979年 | 39篇 |
1978年 | 34篇 |
1977年 | 26篇 |
1976年 | 20篇 |
1974年 | 11篇 |
排序方式: 共有10000条查询结果,搜索用时 15 毫秒
101.
Neurons in the Primate Superior Colliculus are Active Before and During Arm Movements to Visual Targets 总被引:2,自引:0,他引:2
Wilfried Werner 《The European journal of neuroscience》1993,5(4):335-340
The activity of single neurons in the superior colliculus was recorded while a rhesus monkey made arm movements to visual targets located on a screen in front of him. It was found that the activity of a subpopulation of cells was clearly related to these arm movements. The neurons began to discharge either with the onset of the movement, during the movement period, or well before the onset of electromyogram (EMG) activity and movement, and could be active for the entire duration of EMG activity. While the discharge pattern of some of these'reach'neurons was not different for movements to different target positions, other cells showed graded changes in activity depending on the direction of movement. The peak discharge rate could rise to > 100 impulses/s. Some units received somatosensory input; other reach cells exhibited a visual response and/or presaccadic activity. It is likely that the primate superior colliculus is not only involved in the initiation and control of orientating movements of the eyes but also in reaching movements of the arms. 相似文献
102.
José Manuel Valdueza Loris Cristante Jörg Freitag Christian Hagel Hans-Dietrich Herrmann 《Neurosurgical review》1995,18(4):273-275
The clinical, neuroradiological, and histological findings of an adult patient suffering from malignant optic glioma is reported. Rapid visual deterioration was misdiagnosed for several months until biopsy confirmed the tumor. The patient died despite radiation therapy nine months after first symptoms. Our presentation will focus on the problems of diagnosing and establishing therapeutic procedures in this rare malignant neoplasm. 相似文献
103.
104.
Graeme Penington Sally Warmington Susan Hull Nicholas Freijah 《ANZ journal of surgery》1992,62(10):774-779
Aspects of peri-operative management, amputation level and rehabilitation of the lower limb amputee are reported in the context of a review of a rehabilitation service for amputees which includes an integrated prosthetic service. Two hundred admissions were reviewed and some complex cases described. It is concluded that: a very close liaison between the surgeon and the rehabilitation team (ideally with pre-operative consultation) is in the patient's best interests; any person previously walking (or a potential walker) should be considered for a trial of prosthetic walking; an integrated prosthetic service enhances the efficiency of the rehabilitation service; and that modification of the current Artificial Limb Scheme to allow manufacture of first definitive limbs in prosthetic rehabilitation units would further enhance service to patients. 相似文献
105.
A patient with Type I hypoplastic patterned amelogenesis imperfecta, subtype D, presented for prosthodontic evaluation. This article describes the developmental and pathophysiological background of this disease. A clinical report describing the diagnosis, treatment planning, and dental rehabilitation of the patient is reviewed. 相似文献
106.
Procedural memory stimulation in Alzheimer's disease: impact of a training programme 总被引:5,自引:0,他引:5
O. Zanetti G. Binetti E. Magni L. Rozzini A. Bianchetti M. Trabucchi 《Acta neurologica Scandinavica》1997,95(3):152-157
The study evaluates the efficacy of a procedural memory stimulation programme in mild and mild-moderate Alzheimer's disease (AD). Twenty basic and instrumental activities of daily living have been selected, and divided into two groups, comparable for difficulty. Ten normal elderly subjects (age 68.0±4.8 years; MMSE score: 28.7±0.9; education: 7.6±3.5 years) were asked to perform the two groups of daily activities and the time required to perform the tasks of each group was recorded and used as a reference. Ten mild and mild-moderate AD patients (age 77.2±5.3 years; MMSE score: 19.8±3.5; education: 7.3±4.7 years) without major behavioural disturbances constituted the experimental group. Patients were evaluated in all 20 daily activities and the time employed was recorded at baseline and after a 3-week training (1 h/d, 5 d/week) period. Five patients were trained during the 3 weeks on half of the 20 daily activities and the other five patients were trained on the remainder. This procedure was adopted in order to detect separately the improvement in "trained" and "not trained" activities, allowing to control better the effects of the intervention. The assessment of the functional impact of the training was directly measured, through the variation of time employed to perform tasks before and after training. After 3 weeks of training a significant improvement was observed for the trained activities, from 3.6 to 1.9 standard deviations below the performance of the normal elderly controls ( P <0.05). AD patients improved also in not-trained activities from 3.5 to 2.7 standard deviations below the controls'performance ( P <0.05). The rehabilitation of activities of daily living through developing procedural memory strategies may be effective in mild and mild-moderate AD patients. 相似文献
107.
C Lomi 《Scandinavian journal of caring sciences》1992,6(3):131-138
There is a great need today for clinically useful instruments in the rehabilitation of chronic pain patients. The Arthritis Self-efficacy Scale measures patients' perceived self-efficacy to cope with the consequences of chronic arthritis. The aim of the present study was to evaluate a Swedish version of the Arthritis Self-efficacy Scale with respect to factor structure and reliability. Twenty-five chronic pain patients and twenty-four rheumatology patients were given a Swedish version of the Arthritis Self-efficacy Scale twice within a three week interval. The three factor structure of the scale was confirmed; Cronbach's alpha for internal consistency ranged between 0.82-0.91 and test-retest correlations ranged between 0.81-0.91, showing that the instrument satisfactorily met psychometric standards. 相似文献
108.
Yang-Chyuan Chang Ching-Ying Yeh Jung-Der Wang 《American journal of industrial medicine》1995,27(2):271-279
Pattern visual, brainstem auditory, and somatosensory evoked potential (EP) studies were performed on 26 chloralkali workers. The intensity of mercury vapor exposure in these workers was estimated from the individual working history. Mercury levels in blood, urine, and hair were determined with atomic absorption spectrometry. The EP findings were compared with those from individually matched normal subjects. In brainstem auditory and somatosensory EP studies, prolonged neural conduction times in the central nervous system (CNS) were found in workers exposed to mercury vapor. In the pattern visual EP study, mercury workers had higher interpeak amplitudes. Findings of this study suggested that chronic exposure to mercury vapor would affect the CNS functions. A multimodality EP study is a useful adjunct in evaluation of chronic mercury neurotoxicity, especially in an epidemiological study. 相似文献
109.
110.
对LASIK手术中游离瓣的处理 总被引:1,自引:0,他引:1
目的 探讨LASIK手术中出现游离瓣的原因及处理方法。方法 对1500例(2900眼)LASIK手术中出现的9例(9眼)游离瓣进行随访观察。结果 术后1天,9例(9眼)角膜瓣复位良好,边缘整齐,瓣下干净。术后3天取出角膜接触镜,其中7眼视力≥1.0,2眼视力≥0.6。1月视力均达到最佳矫正视力,6月~1年视力稳定。结论LASIK手术中出现游离瓣只要及时正确处理,仍能获得最佳矫正视力。 相似文献