FMRI STUDIES OF VISUAL MOTION AND ATTENTION

本应用程序的长期目标是了解如何 行为目标和对视觉事件的期望， 并在人类大脑中使用。 事件相关功能磁共振成像方法的发展，以区分神经 表示行为目标的信号和来自所述信号的期望 反映了它们对知觉分析的影响。这些方法是 用于研究这些信号对 期望（例如，关于物体或其运动的期望） 颜色），关于期望是如何产生的（例如，从语言或非语言）， 口头命令，或来自不同感官呈现的指令， 形式），以及在视觉感知期间如何使用它（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 感知和意识。 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 和视知觉缺陷，例如单侧忽视、注意力 缺陷障碍或诵读困难。更好地理解注意力 机制也将促进神经生物学的发展- 驱动的康复策略。

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.