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Vestibular-guided visual search

机译：前视图视觉搜索

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摘要

The amnesic symptoms that accompany vestibular dysfunction point to a functional relationship between the vestibular and visual memory systems. However, little is known about the underpinning cognitive processes. As a starting point, we sought evidence for a type of cross-modal interaction commonly observed between other sensory modalities in which the identification of a target (in this case, visual) is facilitated if earlier coupled to a unique, temporally coincident stimulus from another sensory domain (in this case, vestibular). Participants first performed a visual detection task in which stimuli appeared at random locations within a computerised grid. Unknown to participants, the onset of one particular stimulus was accompanied by a brief, sub-sensory pulse of galvanic vestibular stimulation (GVS). Across two visual search experiments, both old and new targets were identified faster when presented in the grid location at which the GVS-paired visual stimulus had appeared in the earlier detection task. This location advantage appeared to be based on relative rather than absolute spatial co-ordinates since the effect held when the search grid was rotated 90 degrees. Together these findings indicate that when individuals return to a familiar visual scene (here, a 2D grid), visual judgements are facilitated when targets appear at a location previously associated with a unique, task-irrelevant vestibular cue. This novel case of multisensory interplay has broader implications for understanding how vestibular signals inform cognitive processes and helps constrain the growing therapeutic application of GVS.
机译：伴随前庭功能障碍指向前庭和视觉记忆系统之间的功能关系的狂犬病症状。但是，关于支撑的认知过程知之甚少。作为一个起点，我们寻求一系列跨模型交互，其中在其他感官模型之间观察到的跨越模型，其中如果较早地耦合到另一个感官域（在这种情况下，前庭）。参与者首先执行视觉检测任务，其中刺激在计算机化网格内的随机位置出现。与会者未知，一个特定刺激的开始伴随着基质前庭刺激（GVS）的简要，亚感觉脉冲。在两个可视化搜索实验中，当呈现在较早的检测任务中出现GVS成对的视觉刺激的网格位置时，旧的和​​新目标都被识别得更快。该位置优势似乎基于相对而不是绝对的空间协调，因为当搜索网格旋转90度时保持的效果。这些调查结果表明，当个人返回熟悉的视觉场景时（这里，2D网格），当目标出现在先前与独特的任务 - 无关的前庭提示相关联的位置时，促进了视觉判断。这种多思考相互作用的新颖案例对理解前庭信号如何通知认知过程并有助于限制GV的不断增长的治疗应用。

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