A wearable system for adaptation to left-right reversed audition tested in combination with magnetoencephalography
A wearable system for adaptation to left-right reversed audition tested in combination with magnetoencephalography
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一种适应左右颠倒试听的可穿戴系统，并结合脑磁图进行测试
DOI：
10.1007/s13534-017-0026-3
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发表时间：
2017
影响因子：
4.6
通讯作者：
Shinya Kuriki
中科院分区：
文献类型：
--
作者：
Atsushi Aoyama;Shinya Kuriki
将人类暴露在不寻常的空间中，可以有效地观察人类对环境的适应策略。虽然这种空间的适应已经典型地用视觉进行了测试，但很少有人研究左右颠倒听觉的适应，部分原因是适应的装置。因此，尚不清楚适应性效应是否达到早期听觉处理。在这里，我们只使用可穿戴设备构建了一个左右颠倒的立体声系统，并要求两名参与者佩戴4周。每周，在选择性反应时间任务下测量脑磁图反应，其中他们立即区分用食指在兼容或不兼容侧传递到左耳或右耳的声音。所构建的系统在声音定位方面表现出很高的性能，并实现了陌生感的逐渐减少。反应兼容的声音的N1m强度往往大于那些反应不兼容的声音，直到第三周，但下降的第四周，这与最初的反应时间较短和较长的兼容和不兼容的条件，分别。在第二周，观察到最大的N1m强度和最长的反应时间，无论兼容性的神经运动连接的中断。总之，我们成功地产生了一个高品质的空间左右颠倒的听觉使用我们的系统。结果表明，4周的暴露于反向听力导致优化的神经运动协调根据新的规则，这最终导致调制的早期听觉处理。
Exposure of humans to unusual spaces is effective to observe the adaptive strategy for an environment. Though adaptation to such spaces has been typically tested with vision, little has been examined about adaptation to left–right reversed audition, partially due to the apparatus for adaptation. Thus, it is unclear if the adaptive effects reach early auditory processing. Here, we constructed a left–right reversed stereophonic system using only wearable devices and asked two participants to wear it for 4 weeks. Every week, the magnetoencephalographic responses were measured under the selective reaction time task, where they immediately distinguished between sounds delivered to either the left or the right ear with the index finger on the compatible or incompatible side. The constructed system showed high performance in sound localization and achieved gradual reduction of a feeling of strangeness. The N1m intensities for the response-compatible sounds tended to be larger than those for the response-incompatible sounds until the third week but decreased on the fourth week, which correlated with the initially shorter and longer reaction times for the compatible and incompatible conditions, respectively. In the second week, disruption of the auditory-motor connectivity was observed with the largest N1m intensities and the longest reaction times, irrespective of compatibility. In conclusion, we successfully produced a high-quality space of left–right reversed audition using our system. The results suggest that a 4-week exposure to the reversed audition causes optimization of the auditory-motor coordination according to the new rule, which eventually results in the modulation of early auditory processing.