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首页> 外文期刊>Seeing and perceiving >Linear path integration deficits in patients with abnormal vestibular afference
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Linear path integration deficits in patients with abnormal vestibular afference

机译：前庭异常患者的线性路径整合缺陷

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摘要

Effective navigation requires the ability to keep track of one's location and maintain orientation during linear and angular displacements. Path integration is the process of updating the representation of body position by integrating internally-generated self-motion signals over time (e.g., walking in the dark). One major source of input to path integration is vestibular afference. We tested patients with reduced vestibular function (unilateral vestibular hypofunction, UVH), patients with aberrant vestibular function (benign paroxysmal positional vertigo, BPPV), and healthy participants (controls) on two linear path integration tasks: experimenter-guided walking and target-directed walking. The experimenter-guided walking task revealed a systematic underestimation of self-motion signals in UVH patients compared to the other groups. However, we did not find any difference in the distance walked between the UVH group and the control group for the target-directed walking task. Results from neuropsychological testing and clinical balance measures suggest that the errors in experimenter-guided walking were not attributable to cognitive and/or balance impairments. We conclude that impairment in linear path integration in UVH patients stem from deficits in self-motion perception. Importantly, our results also suggest that patients with a UVH deficit do not lose their ability to walk accurately without vision to a memorized target location.
机译：有效的导航要求能够在线性和角度位移期间跟踪自己的位置并保持方向。路径整合是通过随着时间的推移整合内部生成的自我运动信号（例如，在黑暗中行走）来更新身体位置表示的过程。路径整合的主要输入来源之一是前庭情感。我们测试了两项线性路径整合任务：实验者指导的步行和目标指导的前庭功能降低的患者（单侧前庭功能低下，UVH），前庭功能异常的患者（良性阵发性位置性眩晕，BPPV）和健康参与者（对照）。步行。由实验者指导的步行任务揭示了与其他组相比，UVH患者的自我运动信号被系统低估了。但是，对于目标定向的步行任务，UVH组和对照组之间的步行距离没有发现任何差异。神经心理学测试和临床平衡测量的结果表明，实验者指导的行走中的错误并非归因于认知和/或平衡障碍。我们得出结论，UVH患者的线性路径整合受损源于自我运动知觉不足。重要的是，我们的结果还表明，患有UVH缺乏症的患者不会失去视力，无法准确地行走到记忆的目标位置。

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