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首页> 外文期刊>The European Journal of Neuroscience >Spatial location is accurately tracked by human auditory sensory memory: evidence from the mismatch negativity.
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Spatial location is accurately tracked by human auditory sensory memory: evidence from the mismatch negativity.

机译：人类的听觉感觉记忆可准确跟踪空间位置：不匹配负性的证据。

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摘要

The nature of spatial representation in human auditory cortex remains elusive. In particular, although humans can discriminate the locations of sounds as close as 1-10 degrees apart, such resolution has not been shown in auditory cortex of humans or animals. We used the mismatch negativity (MMN) event related brain potential to measure the neural response to spatial change in humans in narrow 10 degree spatial steps. Twelve participants were tested using a dense array EEG setup while watching a silent movie and ignoring the sounds. The MMN was reliably elicited by infrequent changes of spatial location of sounds in free field. The MMN amplitude was linearly related to the degree of spatial change with a resolution of at least 10 degrees. These electrophysiological responses occurred within a window of 100-200 milliseconds from stimulus onset, and were localized to the posterior superior temporal gyrus. We conclude that azimuthal spatial displacement is rapidly, accurately and automatically represented in auditory sensory memory in humans, at the level of the auditory cortex.
机译：人类听觉皮层中空间表征的本质仍然难以捉摸。特别地，尽管人类可以辨别相距接近1-10度的声音的位置，但是在人类或动物的听觉皮层中尚未显示出这种分辨率。我们使用失配负性（MMN）事件相关的脑电势，以狭窄的10度空间步长测量人类对空间变化的神经反应。在观看无声电影并忽略声音的同时，使用密集阵列脑电图设置对12名参与者进行了测试。 MMN是由自由场中声音的空间位置的不频繁变化可靠地引发的。 MMN振幅与空间变化的程度线性相关，分辨率至少为10度。这些电生理反应在刺激发生后的100-200毫秒之内发生，并局限于颞上颞回。我们得出结论，在听觉皮层水平上，方位空间位移在人类的听觉感觉记忆中快速，准确且自动地表示。

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