检索结果-南通市图书馆

Brain functional network connectivity based on a visual task: visual information processing-related brain regions are significantly activated in the task state

引用

Neural Regeneration Research 2015年第2期10卷 298-307页

作者： Yan-li Yang Hong-xia Deng Gui-yang Xing Xiao-luan Xia Hai-fang Li School of Computer Science and Technology Taiyuan University of Technology

It is not clear whether the method used in functional brain-network related research can be applied to explore the feature binding mechanism of visual perception. In this study, we inves-tigated feature binding of color and shape in visual perception. Functional magnetic resonance imaging data were collected from 38 healthy volunteers at rest and while performing a visual perception task to construct brain networks active during resting and task states. Results showed that brain regions involved in visual information processing were obviously activated during the task. The components were partitioned using a greedy algorithm, indicating the visual network existed during the resting state.Z-values in the vision-related brain regions were calculated, conifrming the dynamic balance of the brain network. Connectivity between brain regions was determined, and the result showed that occipital and lingual gyri were stable brain regions in the visual system network, the parietal lobe played a very important role in the binding process of color features and shape features, and the fusiform and inferior temporal gyri were crucial for processing color and shape information. Experimental ifndings indicate that understanding visual feature binding and cognitive processes will help establish computational models of vision, improve image recognition technology, and provide a new theoretical mechanism for feature binding in visual perception.

关键词： nerve regeneration functional magnetic resonance imaging resting state task state brain network module division feature binding Fisher’s Z transform connectivity visual stimuli NSFC grants neural regeneration

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

VoiceMyChoice™: Facilitating Understanding of Preferences of Residents with Dementia

引用

Advances in Aging Research 2016年第6期5卷 131-141页

作者： Michelle S. Bourgeois Cameron J. Camp Vincent Antenucci Kathleen Fox Department of Communication Sciences and Disorders University of South Florida Tampa FL USA Center for Applied Research in Dementia Solon OH USA

The purpose of this study was to develop and evaluate the effects of visual materials (labeled pictures and a preference sorting template) on the ability to increase the convergence (agreement) of responses by persons with dementia and their nursing assistants on a Preference Assessment Questionnaire that contained 25 items related to Quality of Life (QoL). A total of 33 nursing assistants participated;54% were native English speakers and 46% were non-native English speakers. Thirty-seven residents with dementia were randomly assigned to either the treatment condition, a 10-min preference card sorting task (VoiceMyChoice?;VMC) which reflected the items and content of the Preference Assessment Questionnaire, or a control condition consisting of a 10-min card matching activity using the materials from VMC. Before and after the treatment or the control session, residents and their assigned NA were administered the Preference Assessment Questionnaire;one week later, these procedures were repeated to assess consistency in responding and improved convergence between dyad members’ responses over time. Results revealed that convergence scores between members of NA-Resident dyads increased significantly after the use of VMC for both the English and non-native English dyads, but not in the control condition. VMC has the potential to enable persons with dementia to communicate personal choices and for their caregivers of various linguistic and/or cultural backgrounds to understand them better.

关键词： Dementia Quality of Life Long-Term Care visual stimuli Choice Nursing Homes

来源：

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

AB007. visual signals modulate refractive error development through dopamine receptor signaling

引用

Annals of Eye Science 2017年第1期 361-361页

作者： Xiangtian Zhou School of Ophthalmology and Optometry Wenzhou Medical UniversityWenzhouChina

Myopia prevalence is dramatically increasing in recent years and in cases in which the refractive error is greater than −6.00 D this disease can lead to severe visual impairment as well as even blindness. Changes in visual input affect the balance between ocular growth and refractive power development. If a mismatch occurs during eye development, the severity of this error affects the degree of myopia. In different animal models of this disease, we found that spatial visual stimuli are essential for maintaining a stable refractive status and normal vision. This is evident because the effects of changes in temporal visual stimuli (e.g., flickering light) on this process depend on whether spatial information is present or absent in the visual environment. Furthermore, the frequency, wavelength and intensity of light are involved in controlling refraction development. However, the molecular mechanisms underlying light-induced refraction changes are still unclear. There is definitive evidence that dopamine (DA) is one of the regulators of this process. This retinal neurotransmitter released by dopaminergic amacrine cells appears to play an important role in vision-guided eye growth because its synthesis and release are positively associated with the light intensity and spatial stimuli impinging on the retina. We found that bright light enhances retinal DA synthesis, and attenuates form deprivation myopia (FDM) development via activation of the dopamine receptor 1 (D1R). A nonselective DA receptor agonist apomorphine (APO) inhibited FDM in dopamine receptor 2 (D2R) knockout mice. These individual similar effects of DA and APO in wildtype and D2R knockout mice suggest that D1R activation has a protective effect against myopia development. On the other hand, D2R activation instead appears to promote myopia development because either genetic D2R ablation or pharmacological inactivation of D2R also attenuates myopia development. Based on these results, we hypothesize that th

关键词： Myopia dopamine(DA) dopamine receptor visual stimuli

来源：

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

欢迎您,

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

在线全文

在线全文

在线全文

请选择保存的检索档案：

请选择收藏分类：

通借通还

欢迎您,

建议与咨询 留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

在线全文

在线全文

在线全文

请选择保存的检索档案： 新增检索档案 确定 取消

请选择收藏分类： 新增自定义分类 确定 取消

通借通还

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

请选择保存的检索档案：

请选择收藏分类：