FMRI STUDIES OF VISUAL MOTION AND ATTENTION

这个应用程序的长期目标是了解如何 呈现了关于视觉事件的行为目标和期望 并在人脑中使用。 发展了与事件相关的功能磁共振成像方法来区分神经 代表来自信号的行为目标和期望的信号 反映了它们对知觉分析的影响。这些方法就是 用于研究这些信号对 期望值(如对物体或其运动的期望值) 颜色)，取决于期望是如何产生的(例如，来自语言或非语言 口头命令，或来自不同感官的指令 模式)，以及在视觉感知过程中如何使用它(例如 检测刺激或对其进行分类)。 这些信息将促进我们对视觉的理论理解 感知和觉察。这些研究也将有助于阐明 临床脑部疾病的病理生理学，涉及注意力 和视觉知觉缺陷，例如单边忽视、注意 缺乏症，或读写困难。更好地理解注意 机制也将促进神经生物学的发展-- 驱动型康复策略。

The long term objective of this application is to understand how behavioral goals and expectations about visual events are represented and used within the human brain. Event-related fMRI methods are developed to distinguish the neural signals representing behavioral goals and expectations from the signals reflecting their effects on perceptual analysis. These methods are then used to study the dependence of these signals on the content of the expectation (e.g. an expectation about the motion of an object or its color), on how the expectation is generated (e.g. from verbal or non- verbal commands, or from instructions presented in different sensory modalities), and on how it is used during visual perception (e.g. to detect a stimulus or to categorize it). This information will advance our theoretical understanding of visual perception and awareness. These studies will also help to elucidate the pathophysiology of clinical brain disorders, that involve attentional and visual perceptual deficits, e.g. unilateral neglect, attentional deficit disorders, or dyslexia. A finer understanding of attentional mechanisms will also facilitate the development of neurobiologically- driven rehabilitative strategies.