全文获取类型
收费全文 | 289篇 |
免费 | 12篇 |
国内免费 | 51篇 |
出版年
2023年 | 5篇 |
2022年 | 4篇 |
2021年 | 8篇 |
2020年 | 12篇 |
2019年 | 14篇 |
2018年 | 13篇 |
2017年 | 19篇 |
2016年 | 10篇 |
2015年 | 13篇 |
2014年 | 13篇 |
2013年 | 53篇 |
2012年 | 21篇 |
2011年 | 18篇 |
2010年 | 16篇 |
2009年 | 15篇 |
2008年 | 20篇 |
2007年 | 14篇 |
2006年 | 16篇 |
2005年 | 15篇 |
2004年 | 13篇 |
2003年 | 10篇 |
2002年 | 8篇 |
2001年 | 11篇 |
2000年 | 1篇 |
1999年 | 1篇 |
1998年 | 1篇 |
1997年 | 1篇 |
1996年 | 3篇 |
1993年 | 2篇 |
1990年 | 1篇 |
1984年 | 1篇 |
排序方式: 共有352条查询结果,搜索用时 15 毫秒
71.
Perceived order of two consecutive stimuli may not correspond to the order of their physical onsets. Such a disagreement presumably results from a difference in the speed of stimulus processing toward central decision mechanisms. Since previous evidence suggests that the right posterior parietal cortex (PPC) plays a role in modulating the processing speed of a visual target, we applied single-pulse TMS over the region in 14 normal subjects, while they judged the temporal order of two consecutive visual stimuli. Stimulus-onset-asynchrony (SOA) randomly varied between -100 and 100 ms in 20-ms steps (with a positive SOA when a target appeared on the right hemi-field before the other on the left), and a point of subjective simultaneity was measured for individual subjects. TMS stimulation was time-locked at 50, 100, 150, and 200 ms after the onset of the first stimulus, and results in trials with TMS on right PPC were compared with those in trials without TMS. TMS over the right PPC delayed the detection of a visual target in the contralateral, i.e., left hemi-field by 24 (+/-7 SE) ms and 16 (+/-4 SE) ms, when the stimulation was given at 50 and 100 ms after the first target onset. In contrast, TMS on the left PPC was not effective. These results show that the right PPC is important in a timely detection of a target appearing on the left visual field, especially in competition with another target simultaneously appearing in the opposite field. 相似文献
72.
73.
思维与语言的关系:来自认知神经科学的证据 总被引:1,自引:0,他引:1
在有关人类心智的研究中,思维与语言的关系始终是一个复杂而重要的课题。借助于新的技术手段和研究思路,当代认知神经科学从新的角度探讨了这个古老而神秘的课题。其研究的基本逻辑是:如果某种特定的思维过程(比如简单的算术运算或者三段论推理)在本质上是“语言的”,那么,在进行这种思维活动时,大脑中负责语言信息处理的区域就会参与;反之,如果某种思维过程在本质上是“空间的”,则大脑中负责空间信息处理的区域就会参与其中。结合来自直观的脑功能图谱证据与其它的跨领域证据(如来自行为实验和脑损伤研究的证据),能够帮助我们更加深入地认识和理解思维与语言的关系问题。 相似文献
74.
人类工作记忆的某些神经影像研究 总被引:14,自引:0,他引:14
采用神经影像技术研究人类工作记忆的脑机理是目前一个十分活跃的研究领域。研究表明存在负责不同信息加工的工作记忆系统 ,如词语工作记忆、空间工作记忆等 ,其中词语工作记忆主要由大脑左半球参与 ,空间工作记忆主要由大脑右半球参与。前额叶在工作记忆中的作用相当复杂 ,包括对记忆信息的注意和抑制、管理、整合等功能。合理巧妙的实验设计、多种研究手段的综合应用必将使人类工作记忆的脑机理得到充分阐明。 相似文献
75.
Adrian Raine Sohee Park Todd Lencz Susan Bihrle Lori LaCasse Cathy Spatz Widom Louai Al‐Dayeh Manbir Singh 《Aggressive behavior》2001,27(2):111-129
This study uses functional magnetic resonance imaging (fMRI) to address two important gaps in our knowledge of brain functioning and violence: (1) What are the brain correlates of adults in the community who have suffered severe physical abuse early in life and who go on to perpetrate serious violence in adulthood? (2) What characterizes those who experience severe physical abuse but who refrain from serious violence? Four groups of participants recruited from the community (controls, severe physical child abuse only, serious violence only, and severely abused, seriously violent offenders) underwent fMRI while performing a visual/verbal working memory task. Violent offenders who had suffered severe child abuse show reduced right hemisphere functioning, particularly in the right temporal cortex. Abused individuals who refrain from serious violence showed relatively lower left, but higher right, activation of the superior temporal gyrus. Abused individuals, irrespective of violence status, showed reduced cortical activation during the working memory task, especially in the left hemisphere. Brain deficits were independent of IQ, history of head injury, task performance, cognitive strategy, and mental activity during the control task. Findings constitute the first fMRI study of brain dysfunction in violent offenders, and indicate that initial right hemisphere dysfunction, when combined with the effects of severe early physical abuse, predisposes to serious violence but that relatively good right hemisphere functioning protects against violence in physically abused children. Aggr. Behav. 27:111–129, 2001. © 2001 Wiley‐Liss, Inc. 相似文献
76.
77.
78.
冠状动脉CT血管成像应用中的思考 总被引:1,自引:1,他引:0
高慧 《医学与哲学(人文社会医学版)》2011,(8):70-71
随着科学技术的发展及医疗水平的提高,冠状动脉CT血管成像(CTCA)已成为诊断冠心病的金标准,该项技术微创、安全、简单、快捷,深受患者青睐。本文讨论该项技术应用中所贯穿的哲学思考与应有的人文关怀。 相似文献
79.
Ann Reynolds 《Quarterly journal of experimental psychology (2006)》2013,66(5):855-872
In four visual search tasks participants were asked to make a target response if either of two targets was present and to make a nontarget response if neither target was present. Some target-absent displays included only nontarget stimuli or features that never occurred in the same displays as targets, whereas other target-absent displays included nontarget stimuli or features that did sometimes occur with targets. Nontarget responses were reliably faster in the former case than in the latter. This “associated nontargets effect” indicates that nontargets are not simply classified as nontargets but in addition are discriminated from one another. Current visual search models may underestimate the degree to which nontargets are processed during search. 相似文献
80.
de Zubicaray GI 《Brain and cognition》2006,60(3):272-281
Cognitive scientists were not quick to embrace the functional neuroimaging technologies that emerged during the late 20th century. In this new century, cognitive scientists continue to question, not unreasonably, the relevance of functional neuroimaging investigations that fail to address questions of interest to cognitive science. However, some ultra-cognitive scientists assert that these experiments can never be of relevance to the study of cognition. Their reasoning reflects an adherence to a functionalist philosophy that arbitrarily and purposefully distinguishes mental information-processing systems from brain or brain-like operations. This article addresses whether data from properly conducted functional neuroimaging studies can inform and subsequently constrain the assumptions of theoretical cognitive models. The article commences with a focus upon the functionalist philosophy espoused by the ultra-cognitive scientists, contrasting it with the materialist philosophy that motivates both cognitive neuroimaging investigations and connectionist modelling of cognitive systems. Connectionism and cognitive neuroimaging share many features, including an emphasis on unified cognitive and neural models of systems that combine localist and distributed representations. The utility of designing cognitive neuroimaging studies to test (primarily) connectionist models of cognitive phenomena is illustrated using data from functional magnetic resonance imaging (fMRI) investigations of language production and episodic memory. 相似文献