// Neural mechanisms of the categorical perception of lexical tones in mandarin-speaking adults
本研究利用功能性磁振造影(fMRI)探討母語為中文的參與者對九階段聲調連續體的類別感知｜行為結果顯示跨類別聲調辨識準確度較高，腦部影像則揭示腹側顳葉區域負責跨類別感知，背側聽覺-運動網絡處理類別內差異｜前額葉與聽覺區域間增強連結反映頂層調控促進精細聲學分析，結果支持雙流模型：腹側通路負責語音類別編碼，背側通路掌管聲調細微聲學辨識。
// This fMRI study investigated how native Mandarin speakers perceive lexical tones categorically using a nine-step tonal continuum. Behavioral results showed better accuracy for across-category tones, while brain imaging revealed ventral temporal regions activate for across-category perception and dorsal auditory-motor networks for within-category processing. Enhanced connectivity between frontal and auditory areas during within-category perception suggests top-down modulation aids fine acoustic analysis. These findings support a dual-stream model where ventral pathways encode phonological categories and dorsal circuits handle detailed acoustic distinctions in tone perception.
Published 2026年7月7日
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