Haley Katarina L, Jacks Adam, Richardson Jessica D, Wambaugh Julie L
Division of Speech and Hearing Sciences, Department of Allied Health Sciences, University of North Carolina, Chapel Hill.
Department of Speech and Hearing Sciences, University of New Mexico, Albuquerque.
Am J Speech Lang Pathol. 2017 Jun 22;26(2S):631-640. doi: 10.1044/2017_AJSLP-16-0103.
We sought to characterize articulatory distortions in apraxia of speech and aphasia with phonemic paraphasia and to evaluate the diagnostic validity of error frequency of distortion and distorted substitution in differentiating between these disorders.
Study participants were 66 people with speech sound production difficulties after left-hemisphere stroke or trauma. They were divided into 2 groups on the basis of word syllable duration, which served as an external criterion for speaking rate in multisyllabic words and an index of likely speech diagnosis. Narrow phonetic transcriptions were completed for audio-recorded clinical motor speech evaluations, using 29 diacritic marks.
Partial voicing and altered vowel tongue placement were common in both groups, and changes in consonant manner and place were also observed. The group with longer word syllable duration produced significantly more distortion and distorted-substitution errors than did the group with shorter word syllable duration, but variations were distributed on a performance continuum that overlapped substantially between groups.
Segment distortions in focal left-hemisphere lesions can be captured with a customized set of diacritic marks. Frequencies of distortions and distorted substitutions are valid diagnostic criteria for apraxia of speech, but further development of quantitative criteria and dynamic performance profiles is necessary for clinical utility.
我们试图描述言语失用症和伴有音素性错语的失语症中的发音扭曲情况，并评估发音扭曲和扭曲替代的错误频率在区分这些疾病方面的诊断效度。
研究参与者为66名左半球中风或创伤后存在语音产生困难的患者。根据单词音节时长将他们分为两组，单词音节时长作为多音节单词语速的外部标准以及可能的语音诊断指标。使用29个变音符号对音频记录的临床运动性言语评估进行精细语音转录。
两组中部分浊音化和元音舌位改变都很常见，并且也观察到了辅音方式和位置的变化。单词音节时长较长的组比单词音节时长较短的组产生的扭曲和扭曲替代错误明显更多，但变异分布在一个表现连续体上，两组之间有很大重叠。
一组定制的变音符号能够捕捉左半球局灶性病变中的音段扭曲。发音扭曲和扭曲替代的频率是言语失用症的有效诊断标准，但为了临床应用，需要进一步制定定量标准和动态表现概况。
