In order to determine the neural substrates of phonemic coding during both listening and speaking, we used a repetition suppression (RS) paradigm in which vowels were repeatedly perceived or produced while measuring BOLD activity with sparse sampling functional magnetic resonance imaging (fMRI). RS refers to the phenomenon that repeated stimuli or actions lead to decreased activity in specific neural populations associated with enhanced neural selectivity and information coding efficiency. Common suppressed BOLD responses during repeated vowel perception and production were observed in the inferior frontal gyri, the posterior part of the left middle temporal gyrus and superior temporal sulcus, the left intraprietal sulcus, as well as in the cingulate gyrus and presupplementary motor area. By providing evidence for common adaptive neural changes in premotor and associative auditory and somatosensory brain areas, the observed RS effects suggest that phonemic coding is partly driven by shared sensorimotor regions in the listening and speaking brain.

中文翻译：

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听力和口语大脑中的自适应音位编码。

为了确定在听和说过程中音素编码的神经底物，我们使用了重复抑制（RS）范例，其中在用稀疏采样功能磁共振成像（fMRI）测量BOLD活动时，重复地感知或产生了元音。RS是指重复刺激或动作导致特定神经群体活动减少的现象，这与增强的神经选择性和信息编码效率有关。在额额下回，左侧中颞回和颞上沟的后部，左侧腹沟，以及扣带回和辅助运动区观察到重复元音感知和产生过程中常见的抑制BOLD反应。