Frequency-dependent integration of auditory and vestibular cues for self-motion perception.
Frequency-dependent integration of auditory and vestibular cues for self-motion perception.
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用于自我运动感知的听觉和前庭线索的频率依赖性整合。
DOI：
10.1152/jn.00307.2019
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发表时间：
2020
影响因子：
2.5
通讯作者：
Hullar,TimothyE
中科院分区：
文献类型：
--
作者：
Shayman,CoreyS;Peterka,RobertJ;Gallun,FrederickJ;Oh,Yonghee;Chang,Nai-YuanN;Hullar,TimothyE
最近的证据表明，听觉信息可能用于改善姿势稳定性、空间定向、导航和步态，这表明听觉是自我运动感知的组成部分。为了确定听觉和其他感官线索如何整合到自我运动感知中，我们测量了身体偏航旋转和听觉环境中的运动感知。在没有空间听觉刺激的情况下，人类的心理物理阈值在一定频率范围内（0.1-1.0 Hz）进行测量，其中包括自旋转、静止听众周围的声源旋转以及在地球固定声源存在下的自旋转。单感觉知觉阈值和联合多感觉阈值被发现是频率依赖的。听觉阈值在低频较好，前庭阈值在高频较好。以峰值角速度表示，多感觉前庭和听觉阈值范围为0.39°/s （0.1 Hz）至0.95°/s (1.0 Hz)，在低频时明显优于听觉单感觉条件（0.1和1.0 Hz分别为0.54°/s至2.42°/s）或前庭单感觉条件（0.1和1.0 Hz分别为2.00°/s至0.75°/s）。单耳提示在降低多感觉阈值方面不如双耳提示有效。假设前庭阈值依赖于速度和加速度线索的加权组合，而听觉阈值则依赖于位移和速度线索，从而推导出与频率无关的阈值。这些结果阐明了听觉平衡的基本机制，并有助于解释之前的发现，表明它在需要自我导向的任务中的重要性。听觉信息可以与视觉、本体感觉和前庭信号相结合，以改善平衡、定向和步态，但这一过程尚不清楚。在这里，我们发现听觉线索显著提高了0.5 Hz以下自我运动感知的敏感性，而前庭线索在更高频率下的贡献更大。运动阈值由位移、速度和加速度信息的加权组合确定。这些发现可能有助于理解和治疗失衡，特别是对有感觉缺陷的人。
Recent evidence has shown that auditory information may be used to improve postural stability, spatial orientation, navigation, and gait, suggesting an auditory component of self-motion perception. To determine how auditory and other sensory cues integrate for self-motion perception, we measured motion perception during yaw rotations of the body and the auditory environment. Psychophysical thresholds in humans were measured over a range of frequencies (0.1–1.0 Hz) during self-rotation without spatial auditory stimuli, rotation of a sound source around a stationary listener, and self-rotation in the presence of an earth-fixed sound source. Unisensory perceptual thresholds and the combined multisensory thresholds were found to be frequency dependent. Auditory thresholds were better at lower frequencies, and vestibular thresholds were better at higher frequencies. Expressed in terms of peak angular velocity, multisensory vestibular and auditory thresholds ranged from 0.39°/s at 0.1 Hz to 0.95°/s at 1.0 Hz and were significantly better over low frequencies than either the auditory-only (0.54°/s to 2.42°/s at 0.1 and 1.0 Hz, respectively) or vestibular-only (2.00°/s to 0.75°/s at 0.1 and 1.0 Hz, respectively) unisensory conditions. Monaurally presented auditory cues were less effective than binaural cues in lowering multisensory thresholds. Frequency-independent thresholds were derived, assuming that vestibular thresholds depended on a weighted combination of velocity and acceleration cues, whereas auditory thresholds depended on displacement and velocity cues. These results elucidate fundamental mechanisms for the contribution of audition to balance and help explain previous findings, indicating its significance in tasks requiring self-orientation.NEW & NOTEWORTHYAuditory information can be integrated with visual, proprioceptive, and vestibular signals to improve balance, orientation, and gait, but this process is poorly understood. Here, we show that auditory cues significantly improve sensitivity to self-motion perception below 0.5 Hz, whereas vestibular cues contribute more at higher frequencies. Motion thresholds are determined by a weighted combination of displacement, velocity, and acceleration information. These findings may help understand and treat imbalance, particularly in people with sensory deficits.