SPATIAL AND NONSPATIAL FACTORS IN SELECTION FOR ACTION

选择行动时的空间和非空间因素

• 批准号: 2873222
• 负责人: LAUREL J BUXBAUM
• 金额: $ 11.16万
• 依托单位: MOSS REHABILITATION HOSPITAL
• 依托单位国家: 美国
• 财政年份: 1997
• 资助国家: 美国
• 起止时间: 1997-02-01 至 2002-01-31
• 项目状态: 已结题
• 来源: https://reporter.nih.gov/project-details/2873222
• 关键词: apraxias; ataxia; attention; behavioral /social science research tag; clinical research; human subject; neural information processing; proprioception /kinesthesia; psychomotor function; space perception; visual perception

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.

描述：（改编自研究者的摘要）：广泛的 文献表明，目标物体检测的速度和准确性 在其他对象（干扰因素）的数组中是以下位置的函数 目标和干扰对象以及视觉和语义特征 这些物体。 对照受试者和患者的最新证据 额叶和顶叶病变表明反应因素（例如是否 该任务需要按下按钮或目标触摸响应）也可能 严重影响此类任务的绩效。 根据这些数据， 以及生理学研究的结果，我们开发了一种 不同额顶叶处理模块作用的临时模型 在位置编码和“行动选择”中。 该模型预测 空间、物体和响应因素在选择中的不同作用 每个建议的处理模块的完整性的函数。 一个 该研究计划的主要目标是测试预测是否正确 该模型在知觉患者的表现中得到了证实 忽视、定向性运动功能减退和视神经共济失调，其病变 假设影响不同的模块。 拟议的实验 计划将以选择性完成任务为中心，并将最终形成 一系列真实物体检测和捕获的研究旨在 与大多数传统实验室相比，与自然行为的相关性更大 视觉注意力的研究。 除了为 了解正常和无序的感知运动处理，数据来自 这些研究有望提供与现实生活有关的证据 患有此类疾病的患者的行动表现，因此， 对评估和治疗的临床意义。