Brain Bases of Natural Scenes's Visual Perception of Natural Scenes (SCENES)
2017年1月17日 更新者：University Hospital, Grenoble
Brain Bases of Visual Perceptionnatural Scenes of Natural Scenes.
Using the available data from psychophysics, cellular electrophysiology and functionnal neuroanatomy of visual pathway, current models of visual recognition suppose that the perception of scenes start with a parallel extraction of differents elementary visual characteristics to different spatial frequencies according to a default processing principle named : 'coarse-to-fine'.
According to this principle, the visual scene's analysis would be decomposed in two steps. Fisrt, the fast analysis of the global information borne by low frequency of the scene will provide an overview of the scene's structure and would enable a first perceptive categorisation which would be then refined, approved or denied by the latest analysis of the most local, detailed and precise information, carried by the very high spatial frequency of the scene.
The research carried out since several years is preparing a biologically plausible model and to find brain bases by different imaging techniques among healthy subjects but also patients with a brain lesion and patients with a peripheral lesion.
The main goal of this Magnetic Resonance Imaging study is to find brain bases of natural scenes's visual perception of the natural scenes.
Three studies in Magnetic Resonance Imaging will be conducted, during which subjects will have to categorize pictures of natural scenes filtered in spatial frequencies. The outcome of this study will allow to refine models of visual recognition, most of them based on analysis of spatial frequencies.
研究概览
研究类型
介入性
注册 (实际的)
141
阶段
- 不适用
联系人和位置
本节提供了进行研究的人员的详细联系信息，以及有关进行该研究的地点的信息。
学习地点
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La Tronche、法国、38700
- UniversityHospitalGrenoble
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参与标准
研究人员寻找符合特定描述的人，称为资格标准。这些标准的一些例子是一个人的一般健康状况或先前的治疗。
资格标准
适合学习的年龄
4年 及以上 (孩子、成人、年长者)
接受健康志愿者
不
有资格学习的性别
全部
描述
Inclusion Criteria for young adults :
- Subjet over 18 years and less than 30 years
- Affiliation to a social security
- Free signed consent
- Medical exam done before participation to the study
- Normal or corrected visual acuity
Exclusion Criteria four young adults :
- Counter-argument to MRI
- Pregnant, breast-feeding or parturient women
- Adults non protected or unable to express their consent
- Adults protected
- Important earing or visual disorder
- Neuropsychiatric disorder current or past passée ou présente (exept benign epilepsy)
- Severe affection on a general level (cardiac, respiratory, hematologic, renal, hépatic, cancerous)
- Drug treatment in progress (exept anti-epileptic drug) likely to de modulate brain activity
Inclusion Criteria for old adults :
- Subjet over 50 years
- Affiliation to a social security
- Free signed consent
- Medical exam done before participation to the study
- Normal or corrected visual acuity
Exclusion Criteria four old adults :
- Counter-argument to MRI
- Pregnant, breast-feeding or parturient women
- Adults non protected or unable to express their consent
- Adults protected
- Important earing or visual disorder
- Neuropsychiatric disorder current or past passée ou présente (exept benign epilepsy)
- Severe affection on a general level (cardiac, respiratory, hematologic, renal, hépatic, cancerous)
- Drug treatment in progress (exept anti-epileptic drug) likely to de modulate brain activity
Inclusion Criteria for children :
- Children between 4 and 12 years
- Affiliation to a social security
- Free signed consent
- Medical exam done before participation to the study
- Normal or corrected visual acuity
Exclusion Criteria four children :
- Counter-argument to MRI
- Important earing or visual disorder
- Important development disorder and/or acquisitions identified by parents and/or school teachers
- Neuropsychiatric disorder current or past passée ou présente (exept benign epilepsy)
- Severe affection on a general level (cardiac, respiratory, hematologic, renal, hépatic, cancerous)
- Drug treatment in progress (exept anti-epileptic drug) likely to de modulate brain activity
学习计划
本节提供研究计划的详细信息，包括研究的设计方式和研究的衡量标准。
研究是如何设计的？
设计细节
- 分配：随机化
- 介入模型：并行分配
- 屏蔽：无（打开标签）
武器和干预
参与者组/臂 |
干预/治疗 |
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其他：Expérience 1
Brain bases of spatial frequencies treatment 30 young adults, 20 old adults 20 children between 4 and 6 years, 20 children between 6 and 12 years and 20 young adults
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其他名称：
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其他：Expérience 2
Brain bases of Computer to Film (CtF) analysis 30 young adults, 20 old adults
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其他名称：
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其他：Expérience 3
Part of parahippocampal gyrus in Computer to Film (CtF) analysis 30 young adults, 20 old adults.
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其他名称：
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研究衡量的是什么？
主要结果指标
结果测量 |
措施说明 |
大体时间 |
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Identify brain bases of natural scenes's visual perception of the natural scenes
大体时间：About 80 minutes
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Evaluation 1 = Visual tasks Experience 1 : Brain bases of spatial frequencies treatment Experience 2 : Brain bases of Computer to Film (CtF) natural scenes analysis MRI exam Experience 3 : Part of parahippocampal gyrus in Computer to Film (CtF) natural scenes analysis MRI exam About 30 minutes Evaluation 2 = Retinotopy : only adults that have shown activations inside occipital cortex during evaluation 1 MRI exam about 50 minutes |
About 80 minutes
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合作者和调查者
在这里您可以找到参与这项研究的人员和组织。
调查人员
- 首席研究员：Alexandre Krainik, Professor、Grenoble Hospital University
出版物和有用的链接
负责输入研究信息的人员自愿提供这些出版物。这些可能与研究有关。
一般刊物
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研究记录日期
这些日期跟踪向 ClinicalTrials.gov 提交研究记录和摘要结果的进度。研究记录和报告的结果由国家医学图书馆 (NLM) 审查，以确保它们在发布到公共网站之前符合特定的质量控制标准。
研究主要日期
学习开始
2012年4月1日
初级完成 (实际的)
2016年3月1日
研究完成 (实际的)
2016年8月1日
研究注册日期
首次提交
2016年7月18日
首先提交符合 QC 标准的
2016年7月18日
首次发布 (估计)
2016年7月21日
研究记录更新
最后更新发布 (估计)
2017年1月18日
上次提交的符合 QC 标准的更新
2017年1月17日
最后验证
2017年1月1日
更多信息
与本研究相关的术语
其他研究编号
- 38RC11.221
此信息直接从 clinicaltrials.gov 网站检索，没有任何更改。如果您有任何更改、删除或更新研究详细信息的请求，请联系 register@clinicaltrials.gov. clinicaltrials.gov 上实施更改，我们的网站上也会自动更新.