Articulation of liquid consonants in onsets and codas by four speakers of General American English was examined using real-time MRI. Midsagittal tongue posture was compared for laterals and rhotics produced in each syllable margin, adjacent to 13 different vowels and diphthongs. Vowel articulation was examined in words without liquids, before each liquid, and after each liquid, to assess the coarticulatory influence of each segment on the others. Overall, nuclear vocalic postures were more influenced by coda rhotics than onset rhotics or laterals in either syllable margin. Laterals exhibited greater temporal and spatial independence between coronal and dorsal gestures. Rhotics were produced with a variety of speaker-specific postures, but were united by a greater degree of coarticulatory resistance to vowel context, patterns consistent with greater coarticulatory influence on adjacent vowels, and less allophonic variation across syllable positions than laterals.

使用实时MRI检查了四位普通美国英语说话者在发作和尾声中的液体辅音发音。比较了每个音节边缘与13个不同的元音和二元音相邻的矢状舌中位姿势。在每种液体之前和之后，用无液体的词检查元音发音，以评估每个片段对其他片段的共发音影响。总体而言，在两个音节的边缘，核语音姿态受尾音的影响比起发音或侧音的影响更大。侧向在冠状手势和背侧手势之间表现出更大的时间和空间独立性。产生各种说话人特定姿势的假言，但对元音上下文的共发音阻力更大，