全文获取类型
收费全文 | 126篇 |
免费 | 2篇 |
国内免费 | 1篇 |
专业分类
耳鼻咽喉 | 3篇 |
基础医学 | 15篇 |
临床医学 | 27篇 |
内科学 | 8篇 |
特种医学 | 2篇 |
外科学 | 61篇 |
预防医学 | 8篇 |
药学 | 1篇 |
肿瘤学 | 4篇 |
出版年
2023年 | 2篇 |
2021年 | 1篇 |
2019年 | 3篇 |
2018年 | 1篇 |
2017年 | 1篇 |
2015年 | 1篇 |
2014年 | 7篇 |
2013年 | 5篇 |
2012年 | 10篇 |
2011年 | 12篇 |
2010年 | 8篇 |
2009年 | 2篇 |
2008年 | 7篇 |
2007年 | 9篇 |
2006年 | 10篇 |
2005年 | 15篇 |
2004年 | 14篇 |
2003年 | 5篇 |
2002年 | 4篇 |
2001年 | 3篇 |
1999年 | 2篇 |
1998年 | 2篇 |
1996年 | 2篇 |
1995年 | 1篇 |
1994年 | 1篇 |
1993年 | 1篇 |
排序方式: 共有129条查询结果,搜索用时 15 毫秒
1.
Kumar S Ferrari R Narayan Y Vieira ER 《Experimental brain research. Experimentelle Hirnforschung. Expérimentation cérébrale》2005,167(3):345-351
The purpose of this study was to determine the response of the cervical muscles to increasing low-velocity, whiplash-type
lateral impacts when the occupant is seated out of the recommended driving position (neutral posture). Twenty healthy volunteers
were subjected to left lateral impacts of 4.1, 7.7, 10.5, and 13.7 m/s2 acceleration, with their trunk flexed by 45° and laterally flexed to the right and left also by 45° at the time of impact.
Bilateral electromyograms of the sternocleidomastoids, trapezii, and splenii capitis were recorded. Under these conditions
of trunk-flexed postures, in a left lateral impact, muscle responses were of generally low magnitude with the trunk flexed
to either the left or right. Even at the highest acceleration of 13.7 m/s2, all muscles generated less than 37% of their known maximal voluntary contraction electromyogram. Also, in these left lateral
impacts, the right splenius capitis showed a greater EMG response than the left splenius capitis regardless of whether the
subject was flexed to the right or left at the time of impact. The right splenius capitis (the one contralateral to the left
lateral impact direction) was more active than its counterpart. Compared to what is known for EMG responses with an occupant
in the neutral posture, the right sternocleidomastoid (usually the most active muscle in a left lateral collision) was significantly
less-active with trunk flexion than with neutral posture conditions (P<0.01). In the absence of bodily impact, the flexed trunk posture does not produce a biomechanical response that would increase
the likelihood of cervical muscle injury in low velocity lateral impacts, and may lessen the risk of injury for some muscles. 相似文献
2.
Mathyus H. Kemperman Sacha M. P. Koch Shrawan Kumar Patrick L. M. Huygen Frank B. M. Joosten Cor W. R. J. Cremers 《International journal of audiology》2013,52(9):523-532
We retrospectively analysed long-term serial audiometry data from patients with branchio-oto-renal (BOR) syndrome to show the features of progression and fluctuation in hearing impairment and relate the findings to age and magnetic resonance imaging (MRI) findings in the petrosal bones. Thirty-two clinically affected BOR patients from six Dutch families (A–F) were included. Audiograms were available in 24 cases, covering followup intervals of between 3 and 30 years, and suitable for individual statistical analysis in 16 cases; 14 cases also had MRI findings. Significant progression in hearing impairment was found in 10 cases, while findings of significant fluctuation were made in seven cases. These findings did not clearly correlate with MRI findings. Substantial fluctuation occurred only in cases followed at a relatively young age. Patients with an enlarged endolymphatic duct and/or sac showed significantly higher sensorineural hearing thresholds than those with either normal MRI findings or cochlear/labyrinthine hypoplasia with or without enlarged duct or sac. We conclude that progressive, fluctuant hearing loss occurred in some BOR patients; however, only young patients showed substantial threshold fluctuation. BOR patients with an enlarged endolymphatic duct and/or sac on MRI seemed to be predisposed to developing more severe hearing impairment. 相似文献
3.
4.
5.
6.
7.
This paper reviews the current state of knowledge regarding the tools used in evaluating the workplace and worker in hopes of preventing low-back injury. Information regarding the current state of expenditure and trends toward ergonomic intervention are discussed. Acknowledgment is made of the increasing shift of responsibility from Compensation Boards to industry, and a review proactive preventative strategies and medical knowledge is included. Current ergonomic assessment tools are reviewed and the role of the Physical Ergonomist is introduced. Suggestions are made regarding the value of current and future approaches in prevention and direction of research. 相似文献
8.
9.
Chambers AP Stefater MA Wilson-Perez HE Jessen L Sisley S Ryan KK Gaitonde S Sorrell JE Toure M Berger J D'Alessio DA Sandoval DA Seeley RJ Woods SC 《Physiology & behavior》2011,105(1):120-123
Bariatric surgery is the most efficacious procedure for eliciting weight loss in humans, and many patients undergoing the procedure experience significant lessening of their symptoms of type-2 diabetes in addition to losing weight. We have adapted two bariatric surgical procedures commonly employed in humans to a rat model to begin to understand the mechanisms underlying the improvements in energy homeostasis. Young adult male rats received either roux-en-Y gastric bypass (RYGB) or vertical sleeve gastrectomy (VSG) and were assessed for body weight, food intake and parameters of glucose homeostasis over a 28-week period. Control rats received either a sham surgical procedure or else were unoperated. RYGB and VSG had comparable beneficial effects relative to controls. They ate less food and lost more weight, and they both had improved glucose parameters. The most intriguing aspect of the findings is that the two surgical procedures had such similar effects in spite of quite different rearrangements of the gastrointestinal system. 相似文献
10.
Kumar S Pandya S Singh SK Panigrahy B Acharya N Lal A Mandal AK 《Journal of endourology / Endourological Society》2008,22(5):979-983
L-shaped fused ectopic kidney is a rare variant of crossed fused renal ectopia. We describe a case of crossed fused L-shaped kidney with congenital ureteropelvic junction obstruction involving an orthotopically located kidney presenting as renal trauma, and its management by laparoscopic heminephrectomy. 相似文献