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首页> 外文期刊>Clinical neurophysiology >The mismatch negativity (MMN) with no standard stimulus.
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The mismatch negativity (MMN) with no standard stimulus.

机译：没有标准刺激的失配负性（MMN）。

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OBJECTIVE: The recent fast multi-feature mismatch negativity (MMN) paradigms rest on the assumption that the deviant stimuli, alternating with the standard tone, strengthen the memory trace of the standard in respect to those attributes they have in common. In the present study, we tested whether the MMN can be recorded even without the standard stimulus, with the invariant properties of the deviant stimuli serving as a standard against which to detect the sound changes. METHODS: MMN was recorded for changes in sound duration, frequency, intensity, location, gap, brightness, density, and noise level in a new multi-feature paradigm where no standard stimuli were used. In addition, these MMNs were compared with those recorded in the conventional multi-feature paradigm. RESULTS: All sound changes elicited significant MMN responses that were highly similar between paradigms. CONCLUSIONS: The MMN can be recorded even without the standard stimulus, as an accurate memory trace is constructed for the invariant features of the auditory input. SIGNIFICANCE: Omitting the standard stimuli results in almost 50% shorter recording time and the larger selection of deviant types with the newly introduced brightness, density, and noise-level changes provides even more information on the individual perceptual profiles than conventional multi-feature paradigms.
机译：目的：最近的快速多特征失配否定性（MMN）范式基于这样的假设，即异常刺激与标准音调交替使用，可以增强标准在它们共有的那些属性方面的记忆力。在本研究中，我们测试了即使没有标准刺激也可以录制MMN，并且异常刺激的不变特性作为检测声音变化的标准。方法：在没有使用标准刺激的新的多特征范例中，记录了MMN的声音持续时间，频率，强度，位置，间隙，亮度，密度和噪声水平的变化。此外，将这些MMN与常规的多特征范例中记录的MMN进行了比较。结果：所有声音变化都引起显着的MMN反应，这在范例之间非常相似。结论：即使没有标准刺激，也可以记录MMN，因为可以为听觉输入的不变特征构建准确的记忆轨迹。意义：省略标准刺激可以使记录时间缩短近50％，并且通过新引入的亮度，密度和噪声水平变化可以选择更多的异常类型，这比常规的多特征范式提供了更多有关单个感知轮廓的信息。

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