Deep sampling of cognitive effects in the human visual system
人类视觉系统认知效应的深度采样
基本信息
- 批准号:10658424
- 负责人:
- 金额:$ 28.74万
- 依托单位:
- 依托单位国家:美国
- 项目类别:
- 财政年份:2023
- 资助国家:美国
- 起止时间:2023-07-01 至 2027-06-30
- 项目状态:未结题
- 来源:
- 关键词:AlgorithmsAreaAttentionBehaviorBenchmarkingBrainCognitiveComplexComputer ModelsDataData SetDecision MakingDevelopmentDyslexiaEstimation TechniquesEventExperimental DesignsFunctional Magnetic Resonance ImagingGoalsGrantHumanImageIndividualInstructionInterdisciplinary StudyInvestigationInvestmentsLaboratoriesLibrariesLinear ModelsMapsMeasurementMediatingMethodologyMethodsModelingNatureNeural Network SimulationNoiseParticipantPerformancePrimatesProsopagnosiaResearchResearch PersonnelResolutionResourcesResponse to stimulus physiologySamplingSensorySensory DisordersShort-Term MemorySignal TransductionSoftware ToolsSourceSpecificityStimulusSupport SystemTechniquesTemporal LobeTestingVariantVenousVisualVisual CortexVisual PerceptionVisual SystemWorkblood oxygenation level dependent responsecognitive controlcognitive neurosciencecognitive processcognitive taskcomputational neurosciencedata resourcedata reusedeep neural networkexperienceexperimental studyextrastriate visual cortexfrontal lobehemodynamicsimprovedinformation processinginterdisciplinary approachintraparietal sulcusmultidisciplinaryneuralneuroimagingnovelpredictive modelingprogramsresponsesuccesstheoriestoolvisual informationvisual neurosciencevisual processingvisual stimulus
项目摘要
PROJECT SUMMARY
Much progress has been achieved in building computational models that describe how visual stimuli are encoded
and transformed across the hierarchy of visual areas in the primate brain. However, relatively little attention has
been given to the active component of visual processing, whereby the observer’s engagement in a cognitive or
perceptual task can exert substantial influence on stimulus-evoked activity. The long-term goal of the proposed
research is to develop models that account for not only stimulus-driven but also task-driven effects in the visual
system. To achieve this goal, we invest effort in improving analysis methodology and in generating large high-
quality experimental datasets. In Aim 1, we develop and optimize methods that provide robust fMRI
measurements at the level of single trials. This includes a method that exploits temporal dynamics to isolate
BOLD signals that are more closely related to local neural activity, and an algorithm that improves signal-to-
noise ratio in general linear modeling of fMRI data. In Aim 2, we acquire and prepare a high-field (7T) fMRI
dataset in which a large variety of tasks are performed on a common set of visual stimuli. This dataset exploits
deep sampling of a small number of subjects, and will generate a rich, reusable resource for the fields of cognitive
and computational neuroscience. In Aim 3, we exploit the dataset to test an extant model of how top-down
influences from the intraparietal sulcus modulate responses in ventral visual cortex and to assess how top-down
signals from frontal cortex modulate the fidelity of working memory stimulus encoding in visual cortex. Overall,
this multidisciplinary proposal will deliver reusable methods and data resources, and will push computational
modeling from the domain of stimulus representation into better understanding how the visual system mediates
real-world visual perception and task engagement. Advancing our understanding of the computational
mechanisms underlying visual processing in healthy individuals is a critical step for unraveling the nature of
sensory disorders such as prosopagnosia and dyslexia.
项目总结
项目成果
期刊论文数量(0)
专著数量(0)
科研奖励数量(0)
会议论文数量(0)
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CLAYTON E CURTIS其他文献
CLAYTON E CURTIS的其他文献
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{{ truncateString('CLAYTON E CURTIS', 18)}}的其他基金
Neural synchronization of human frontoparietal cortex
人类额顶皮层的神经同步
- 批准号:
8720874 - 财政年份:2013
- 资助金额:
$ 28.74万 - 项目类别:
Neural synchronization of human frontoparietal cortex
人类额顶皮层的神经同步
- 批准号:
8542898 - 财政年份:2012
- 资助金额:
$ 28.74万 - 项目类别:
Neural synchronization of human frontoparietal cortex
人类额顶皮层的神经同步
- 批准号:
8445860 - 财政年份:2012
- 资助金额:
$ 28.74万 - 项目类别:
Essential Cortical Mechanisms for Working Memory
工作记忆的基本皮质机制
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10676983 - 财政年份:2006
- 资助金额:
$ 28.74万 - 项目类别:
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