当前位置: X-MOL 学术Brain Lang. › 论文详情
Our official English website, www.x-mol.net, welcomes your feedback! (Note: you will need to create a separate account there.)
Effects of age and left hemisphere lesions on audiovisual integration of speech
Brain and Language ( IF 2.5 ) Pub Date : 2020-07-01 , DOI: 10.1016/j.bandl.2020.104812
Kelly Michaelis 1 , Laura C Erickson 2 , Mackenzie E Fama 3 , Laura M Skipper-Kallal 1 , Shihui Xing 4 , Elizabeth H Lacey 5 , Zainab Anbari 1 , Gina Norato 6 , Josef P Rauschecker 7 , Peter E Turkeltaub 5
Affiliation  

Neuroimaging studies have implicated left temporal lobe regions in audiovisual integration of speech and inferior parietal regions in temporal binding of incoming signals. However, it remains unclear which regions are necessary for audiovisual integration, especially when the auditory and visual signals are offset in time. Aging also influences integration, but the nature of this influence is unresolved. We used a McGurk task to test audiovisual integration and sensitivity to the timing of audiovisual signals in two older adult groups: left hemisphere stroke survivors and controls. We observed a positive relationship between age and audiovisual speech integration in both groups, and an interaction indicating that lesions reduce sensitivity to timing offsets between signals. Lesion-symptom mapping demonstrated that damage to the left supramarginal gyrus and planum temporale reduces temporal acuity in audiovisual speech perception. This suggests that a process mediated by these structures identifies asynchronous audiovisual signals that should not be integrated.

中文翻译:

年龄和左半球病变对语音视听整合的影响

神经影像学研究表明左颞叶区域参与语音的视听整合,下顶叶区域参与传入信号的时间绑定。然而,尚不清楚哪些区域是视听整合所必需的,尤其是当听觉和视觉信号及时偏移时。衰老也会影响整合,但这种影响的性质尚未解决。我们使用 McGurk 任务来测试两个老年人组的视听整合和对视听信号时间的敏感性:左半球中风幸存者和对照组。我们观察到两组的年龄和视听语音整合之间存在正相关关系,并且相互作用表明病变降低了对信号之间时间偏移的敏感性。病变症状映射表明,左缘上回和颞平面的损伤会降低视听言语感知的时间敏锐度。这表明由这些结构介导的过程识别了不应集成的异步视听信号。
更新日期:2020-07-01
down
wechat
bug