Contributions of visual and proprioceptive information to travelled distance estimation during changing sensory congruencies
Contributions of visual and proprioceptive information to travelled distance estimation during changing sensory congruencies
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DOI：
10.1007/s00221-014-4011-0
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发表时间：
2014-10-01
影响因子：
2
通讯作者：
Buelthoff, Heinrich H.
中科院分区：
文献类型：
--
作者：
Campos, Jennifer L.;Butler, John S.;Buelthoff, Heinrich H.
最近的研究提供的证据表明，视觉和身体为基础的线索（前庭，本体感受和传出复制）集成使用加权线性和在步行和被动运输。然而，很少有人知道的具体权重的视觉信息时，结合单独的本体感受输入，在前庭信息的情况下，向前的自我运动。因此，在这项研究中，参与者在固定的跑步机上行走，同时通过头戴式显示器真实的实时更新动态视觉信息。该任务要求参与者行进预定义的距离，然后通过使用游戏控制器调整自我中心的深度目标来匹配该距离。旅行距离的信息，通过单独的视觉线索，单独的本体感受线索或两种线索相结合。在组合提示条件下，通过改变试验中的视觉增益（0.7x，1.0x，1.4x; Exp. 1)或在试验中的本体感受增益（0.7x，1.0x，1.4x; Exp. 2）。结果表明，本体感觉的整体权重高于视觉。然而，这些权重被缩放为感觉输入在试验中提供更稳定信息的函数。具体来说，当视觉增益不断操纵，本体感受的重量高于本体感受增益不断操纵。因此，这些结果揭示了有趣的特点，线索加权的背景下展开的时空线索动态。
Recent research has provided evidence that visual and body-based cues (vestibular, proprioceptive and efference copy) are integrated using a weighted linear sum during walking and passive transport. However, little is known about the specific weighting of visual information when combined with proprioceptive inputs alone, in the absence of vestibular information about forward self-motion. Therefore, in this study, participants walked in place on a stationary treadmill while dynamic visual information was updated in real time via a head-mounted display. The task required participants to travel a predefined distance and subsequently match this distance by adjusting an egocentric, in-depth target using a game controller. Travelled distance information was provided either through visual cues alone, proprioceptive cues alone or both cues combined. In the combined cue condition, the relationship between the two cues was manipulated by either changing the visual gain across trials (0.7x, 1.0x, 1.4x; Exp. 1) or the proprioceptive gain across trials (0.7x, 1.0x, 1.4x; Exp. 2). Results demonstrated an overall higher weighting of proprioception over vision. These weights were scaled, however, as a function of which sensory input provided more stable information across trials. Specifically, when visual gain was constantly manipulated, proprioceptive weights were higher than when proprioceptive gain was constantly manipulated. These results therefore reveal interesting characteristics of cue-weighting within the context of unfolding spatio-temporal cue dynamics.