Dept. de Psicología Básica, Clínica y Psicobiología, Universitat Jaume I, Castellón, Spain.
Brain Lang. 2013 Sep;126(3):253-62. doi: 10.1016/j.bandl.2013.05.009. Epub 2013 Jul 18.
Neuroimaging studies of audiovisual speech processing have exclusively addressed listeners' native language (L1). Yet, several behavioural studies now show that AV processing plays an important role in non-native (L2) speech perception. The current fMRI study measured brain activity during auditory, visual, audiovisual congruent and audiovisual incongruent utterances in L1 and L2. BOLD responses to congruent AV speech in the pSTS were stronger than in either unimodal condition in both L1 and L2. Yet no differences in AV processing were expressed according to the language background in this area. Instead, the regions in the bilateral occipital lobe had a stronger congruency effect on the BOLD response (congruent higher than incongruent) in L2 as compared to L1. According to these results, language background differences are predominantly expressed in these unimodal regions, whereas the pSTS is similarly involved in AV integration regardless of language dominance.
神经影像学研究视听言语处理仅针对母语（L1）。然而，目前的一些行为研究表明，视听处理在非母语（L2）言语感知中起着重要作用。本 fMRI 研究在 L1 和 L2 中测量了听觉、视觉、视听一致和视听不一致话语时的大脑活动。pSTS 中对一致的视听言语的 BOLD 反应强于两种单模态条件下的任何一种 L1 和 L2。然而，该区域的视听处理在语言背景上没有差异。相反，与 L1 相比，双侧枕叶区域在 L2 中对 BOLD 反应的一致性效应更强（一致高于不一致）。根据这些结果，语言背景差异主要表现在这些单模态区域，而 pSTS 则无论语言优势如何，都同样参与视听整合。
