Temporal factors affecting somatosensory-auditory interactions in speech processing.
Temporal factors affecting somatosensory-auditory interactions in speech processing.
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DOI：
10.3389/fpsyg.2014.01198
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发表时间：
2014
影响因子：
3.8
通讯作者：
Ostry DJ
中科院分区：
文献类型：
--
作者：
Ito T;Gracco VL;Ostry DJ
语音感知依赖于听觉和视觉信息。然而，声音特定的体感输入也被证明会影响语音感知处理。在本研究中，我们进一步探讨了躯体感觉信息和言语知觉加工之间的关系，通过解决的假设，口面运动和声音处理之间的时间关系有助于言语知觉的躯体感觉-听觉相互作用。我们研究了事件相关电位（ERPs）的变化，多感觉同步（同时）和异步（90毫秒滞后和铅）的体感和听觉刺激相比，单独的unisensory听觉和体感刺激。我们使用机器人设备应用面部皮肤体感变形，其在时间和持续时间上与语音产生中所经历的相似。同步多感觉刺激后，ERP的幅度是可靠的两个unisensory电位不同。更重要的是，ERP差异的大小随着体感听觉刺激的相对时间的变化而变化。事件相关的活动变化，由于刺激时间被视为160和220毫秒之间的体感发病，主要是周围的顶叶区。结果表明，体感-听觉会聚是一种动态的调节过程，体感信息对言语加工过程的贡献取决于感觉输入在言语产生过程中的特定时序。
Speech perception is known to rely on both auditory and visual information. However, sound-specific somatosensory input has been shown also to influence speech perceptual processing. In the present study, we addressed further the relationship between somatosensory information and speech perceptual processing by addressing the hypothesis that the temporal relationship between orofacial movement and sound processing contributes to somatosensory–auditory interaction in speech perception. We examined the changes in event-related potentials (ERPs) in response to multisensory synchronous (simultaneous) and asynchronous (90 ms lag and lead) somatosensory and auditory stimulation compared to individual unisensory auditory and somatosensory stimulation alone. We used a robotic device to apply facial skin somatosensory deformations that were similar in timing and duration to those experienced in speech production. Following synchronous multisensory stimulation the amplitude of the ERP was reliably different from the two unisensory potentials. More importantly, the magnitude of the ERP difference varied as a function of the relative timing of the somatosensory–auditory stimulation. Event-related activity change due to stimulus timing was seen between 160 and 220 ms following somatosensory onset, mostly around the parietal area. The results demonstrate a dynamic modulation of somatosensory–auditory convergence and suggest the contribution of somatosensory information for speech processing process is dependent on the specific temporal order of sensory inputs in speech production.
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影响因子：
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作者：
Foxe, JJ;Wylie, GR;Murray, MM
通讯作者：
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影响因子：
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