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首页> 外文期刊>The European Journal of Neuroscience >'Hearing' syllables by 'seeing' visual stimuli.
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'Hearing' syllables by 'seeing' visual stimuli.

机译：通过“看到”视觉刺激来“听”音节。

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摘要

Abstract Currently it is discussed whether the same cortical areas are activated during the imagination of as during the actual presentation of specific stimuli. Some argue that mostly the secondary but not the primary sensory areas are active during imagination. Using functional magnetic resonance imaging we explored whether auditory verbal imagery of syllables has sufficient power to evoke haemodynamic responses in the auditory cortex. To overcome the detrimental effects of scanner noise, one group of subjects was trained to vividly imagine hearing a syllable while a flashlight was presented. A control group did not receive this training. We found that only the trained group revealed haemodynamic responses in the auditory cortex during auditory imagination while the control group showed no activation within the auditory cortex. Peak activations during auditory verbal imagery are located bilaterally within the superior temporal gyrus region in the vicinity of the planum temporale. While these secondary auditory areas are active during auditory verbal imagery, there was no activation in Heschl's gyrus. We hypothesize that auditory verbal imagery is associated with haemodynamic responses in secondary auditory and not primary auditory areas.
机译：摘要目前正在讨论在想象的过程中是否激活与实际刺激过程相同的皮质区域。一些人认为，想象力期间主要是次要的而不是主要的感觉区域活跃。使用功能磁共振成像，我们探讨了音节的听觉言语成像是否具有足够的能力来诱发听觉皮层的血流动力学响应。为了克服扫描仪噪声的有害影响，对一组对象进行了训练，以生动地想象在呈现手电筒时听到一个音节。对照组没有接受该培训。我们发现，只有训练有素的组在听觉想象期间显示了听觉皮层的血流动力学响应，而对照组则没有在听觉皮层内激活。听觉言语成像期间的峰值激活位于颞上方附近颞上回区域的两侧。尽管这些次要听觉区域在听觉言语成像过程中很活跃，但赫氏回旋并没有激活。我们假设听觉言语意象与第二听觉而不是第一听觉区域的血流动力学反应有关。

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