Investigating the neuro-cognitive fundaments of the perception of illusory self-motion

研究错觉自我运动感知的神经认知基础

• 批准号: RGPIN-2017-04387
• 负责人: Keshavarz, Behrang
• 金额: $ 1.68万
• 依托单位: Ryerson University
• 依托单位国家: 加拿大
• 项目类别: Discovery Grants Program - Individual
• 财政年份: 2019
• 资助国家: 加拿大
• 起止时间: 2019-01-01 至 2020-12-31
• 项目状态: 已结题
• 来源: https://www.nserc-crsng.gc.ca/ase-oro/Details-Detailles_eng.asp?id=679298
• 关键词: Investigating; neuro; cognitive; fundaments; perception

The perception of self-motion is guided by the integration of different sensory information, including visual, vestibular (inner-ears), and proprioceptive (position of the muscles and joints) cues. Information delivered by these senses is typically congruent, giving rise to a global, accurate perception of movement through space. However, under certain circumstances illusory self-motion or vection (i.e., self-motion perception despite the absence of real, physical movement) can also be experienced. An example for vection in real-world situation is the train illusion, whereby sitting in a stationary train and seeing a neighboring train moving creates the illusion that one's own train is moving. Vection can also be observed in situations that stimulate a large proportion of the visual field, such as in simulators or virtual reality (VR) and plays an important role in these applications. ***The neuro-cognitive fundaments of vection are still unknown. The overall goal of this research program is to fill this gap by combining psychophysiological and behavioral methods. The specific objectives include: (1) Identifying the temporal and spatial aspects of cortical activity during the perception of vection using electroencephalography (EEG). (2) Investigating how the combination of multisensory cues (visual, auditory, haptic) affects the neuro-cognitive responses with respect to vection. (3) Determining the extent to which cognitive aspects, e.g. contextual information, influence vection and its detection in the EEG. ***This research program will be conducted using two immersive VR laboratories that are part of Toronto Rehabilitation Institute's research facilities: StreetLab, equipped with a large, curved projection screen with floor projection and surround sound; and, StereoProLab, which offers stereoscopic projection of images onto a large screen and an array of multiple screens covering a large proportion of the visual field. Both facilities have been proven to reliably generate vection and will allow to systematically manipulate sensory information. Vection will be measured through self-reports (vection onset, offset, duration, and intensity). A 32-channel EEG system will be used in both laboratories to measure brain activity during phases of vection. ***This research will have impact on multiple levels: (1) Improving the theoretical understanding of vection. (2) Identification of objective neuro-cognitive markers that correlate with the subjective experience of vection. (3) Development of applications that use virtual environments where vection is often a desired phenomenon, e.g. the use of VR in the context of training and rehabilitation.

自我运动的感知是由不同感觉信息的整合引导的，包括视觉、前庭（内耳）和本体感受（肌肉和关节的位置）线索。这些感官传递的信息通常是一致的，从而产生对空间运动的全局、准确的感知。然而，在某些情况下，虚幻的自我运动或矢量（即，尽管没有真实的物理运动，但也可以体验自运动感知）。现实世界中的一个例子是火车错觉，即坐在一辆静止的火车上，看到相邻的火车移动，就会产生自己的火车正在移动的错觉。矢量也可以在刺激大部分视野的情况下观察到，例如在模拟器或虚拟现实（VR）中，并且在这些应用中起着重要作用。***这项研究计划的总体目标是通过结合心理生理学和行为学方法来填补这一空白。具体目标包括：（1）使用脑电图（EEG）识别在向量感知期间皮层活动的时间和空间方面。(2)研究多感官线索（视觉、听觉、触觉）的组合如何影响与向量相关的神经认知反应。(3)确定认知方面（例如，上下文信息）影响EEG中的向量及其检测的程度。* 这项研究计划将使用两个沉浸式虚拟现实实验室进行，这两个实验室是多伦多康复研究所研究设施的一部分：StreetLab，配备了一个带有落地投影和环绕声的大型曲面投影屏幕; StereoProLab，提供图像在大屏幕上的立体投影，以及覆盖大部分视野的多个屏幕阵列。这两种设施已被证明可以可靠地产生矢量，并将允许系统地操纵感官信息。将通过自我报告测量向量（向量开始、偏移、持续时间和强度）。两个实验室都将使用32通道EEG系统来测量向量阶段的大脑活动。 * 本研究将在多个层面产生影响：（1）提高对向量的理论认识。(2)识别与感染的主观体验相关的客观神经认知标志物。(3)开发使用虚拟环境的应用程序，其中矢量通常是一种期望的现象，例如在训练和康复的背景下使用VR。