SPATIAL AND NONSPATIAL FACTORS IN SELECTION FOR ACTION

描述：（改编自研究者摘要）：广泛的 文献表明，目标物体的检测的速度和准确性 在其他对象（干扰项）的数组中， 目标和干扰物的视觉和语义特征， 这些物体。 最近的证据表明，对照组和 额叶和顶叶病变表明，反应因素（如是否 该任务需要按钮按压或目标触摸响应）还可以 对这些任务的表现产生重大影响。 根据这些数据， 以及生理研究的结果，我们已经开发了一种 不同额顶叶处理模块作用的初步模型 位置编码和“选择行动”。 该模型预测 空间，对象和反应因素在选择中的不同作用， 每个建议处理模块的完整性功能。 一 这项研究计划的主要目标是测试是否预测 该模型在患者的表现中得到了证实， 忽视，方向性运动功能减退性忽视和视共济失调，其病变 会影响不同的模块 拟议的实验 计划将集中在选择性的达到任务，并将在一个高潮 一系列真实物体检测和识别的研究，旨在 比大多数传统的实验室更适合自然主义行动 视觉注意力的研究 除了对《公约》作出贡献外， 理解正常和紊乱的知觉运动处理，数据来自 这些研究有望为现实生活中的 患者的行为表现，因此， 评估和治疗的临床意义。

DESCRIPTION: (Adapted From The Investigator's Abstract): An extensive literature suggests that speed and accuracy of detection of a target object in an array of other objects (distractors) is a function of the locations of target and distractor objects and the visual and semantic characteristics of these objects. Recent evidence for control subjects and patients with frontal and parietal lesions suggests that response factors (such as whether the task requires a button press or target-touch response) may also critically influence performance on such tasks. On the basis of such data, as well as findings from physiological studies, we have developed a provisional model of the role of distinct fronto-parietal processing modules in location coding and "selection for action". This model predicts differing roles for spatial, object, and response factors in selection as a function of the integrity of each of the proposed processing modules. A major goal of this research program is to test whether the predictions of the model are borne out in the performance of patients with perceptual neglect, directional hypokinesic neglect, and optic ataxia, whose lesions are hypothesized to affect different modules. The proposed experimental program will center upon selective reaching tasks, and will culminate in a series of studies of real-object detection and prehension designed to have greater relevance to naturalistic action than do most traditional laboratory studies of visual attention. In addition to contributing to the understanding of normal and disordered percept-motor processing, data from these studies are expected to provide evidence bearing on the real-life action performance of patients with such disorders, and thus, to have clinical implications for assessment and treatment.