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首页> 美国卫生研究院文献>Frontiers in Human Neuroscience >Look at the Beat Feel the Meter: Top–Down Effects of Meter Induction on Auditory and Visual Modalities
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Look at the Beat Feel the Meter: Top–Down Effects of Meter Induction on Auditory and Visual Modalities

机译：看一下节拍感觉到仪表：仪表感应对听觉和视觉形态的自上而下的影响

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摘要

Recent research has demonstrated top–down effects on meter induction in the auditory modality. However, little is known about these effects in the visual domain, especially without the involvement of motor acts such as tapping. In the present study, we aim to assess whether the projection of meter on auditory beats is also present in the visual domain. We asked 16 musicians to internally project binary (i.e., a strong-weak pattern) and ternary (i.e., a strong-weak-weak pattern) meter onto separate, but analog, visual and auditory isochronous stimuli. Participants were presented with sequences of tones or blinking circular shapes (i.e., flashes) at 2.4 Hz while their electrophysiological responses were recorded. A frequency analysis of the elicited steady-state evoked potentials allowed us to compare the frequencies of the beat (2.4 Hz), its first harmonic (4.8 Hz), the binary subharmonic (1.2 Hz), and the ternary subharmonic (0.8 Hz) within and across modalities. Taking the amplitude spectra into account, we observed an enhancement of the amplitude at 0.8 Hz in the ternary condition for both modalities, suggesting meter induction across modalities. There was an interaction between modality and voltage at 2.4 and 4.8 Hz. Looking at the power spectra, we also observed significant differences from zero in the auditory, but not in the visual, binary condition at 1.2 Hz. These findings suggest that meter processing is modulated by top–down mechanisms that interact with our perception of rhythmic events and that such modulation can also be found in the visual domain. The reported cross-modal effects of meter may shed light on the origins of our timing mechanisms, partially developed in primates and allowing humans to synchronize across modalities accurately.
机译：最近的研究表明，自上而下的效果对听觉方式中的仪表感应产生了影响。但是，对于这些效果在视觉领域知之甚少，尤其是在没有诸如敲击之类的运动行为的情况下。在本研究中，我们旨在评估视听仪上的投影仪是否也存在于视觉领域。我们要求16位音乐家在内部将二元（即强弱模式）和三元（即强弱模式）仪表投影到单独的但模拟，视觉和听觉等时刺激上。在记录他们的电生理反应的同时，以2.4Hz的音调或闪烁的圆形形状（即，闪烁）向参与者展示。对引起的稳态诱发电位的频率分析使我们能够比较拍频（2.4 Hz），其一次谐波（4.8 Hz），二阶次谐波（1.2 Hz）和三阶次谐波（0.8 Hz）的频率以及各种方式。考虑到振幅谱，我们在两种模态的三元条件下观察到在0.8 Hz处振幅的增强，表明跨模态的仪表感应。在2.4和4.8 Hz时，模态和电压之间存在相互作用。观察功率谱，我们还观察到听觉与零之间存在显着差异，但在1.2 Hz的视觉二进制条件下则没有。这些发现表明，仪表处理是由自上而下的机制调节的，这种机制与我们对节奏事件的感知相互作用，并且这种调节也可以在视觉域中找到。所报告的仪表的跨模式影响可能会揭示我们计时机制的起源，这种机制部分起源于灵长类动物，并允许人类在各种模式之间进行精确同步。

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