Department of Rehabilitation, the First Affiliated Hospital of Jinan University, Guangzhou, Guangdong 510630, China.
Department of Rehabilitation, Nanfang Hospital, Southern Medical University, Guangzhou, Guangdong 510515, China.
J Clin Neurosci. 2019 Aug;66:77-82. doi: 10.1016/j.jocn.2019.05.020. Epub 2019 Jun 1.
The present study aimed to identify certain acoustic parameters for speech evaluation in cerebral palsy children with dysarthria.
The subject included 30 native Mandarin-Speaking children with cerebral palsy, who were 5-15 years old, and 13 healthy children in a similar age range. Each subject was recorded while producing a list of 12 Mandarin words, which included three syllables ('ba', 'bi' and 'du'), in all four Mandarin tones. The formants (F1 and F2) of monophthong vowels /a, i, u/ were extracted from each vowel token. Based on F1 and F2, the vowel acoustic indexes VSA, VAI and FCR were calculated and analyzed.
Compared with the control group, the cerebral palsy group had significantly low F1 and F2 in vowel /a/ (P < 0.05), and F2 in vowel /i/ (P < 0.05), while F1 and F2 in vowel /u/ and F1 in vowel /i/ had no significant difference. Between the healthy group and cerebral palsy group, the differences in VSA, VAI and FCR were all statistically significant.
Children with cerebral palsy have reduced vowel space and speech articulation. The significant difference in vowel acoustic indexes (VSA, VAI and FCR) among the two groups revealed that the three indexes were sensitive to the variation of the vowels production in children with cerebral palsy, and that these may be used as an evaluation method of speech intelligibility caused by impaired vowel pronunciation in children with cerebral palsy, and the effect of rehabilitation therapy.
本研究旨在探讨脑瘫伴构音障碍儿童的某些语音参数，为其言语评估提供依据。
研究对象为 30 名 5-15 岁的母语为普通话的脑瘫儿童和 13 名年龄相仿的健康儿童。所有受试者均需朗读包含三个音节（“ba”“bi”和“du”）的 12 个普通话词汇，共读出四个声调。从每个元音的音段中提取出单韵母/a/、/i/和/u/的第一和第二共振峰（F1 和 F2）。基于 F1 和 F2，计算并分析了元音声学指标 VSA、VAI 和 FCR。
与对照组相比，脑瘫组的元音/a/的 F1 和 F2（P<0.05）和元音/i/的 F2（P<0.05）显著降低，而元音/u/的 F1 和 F2 以及元音/i/的 F1 无显著差异。与健康组相比，脑瘫组的 VSA、VAI 和 FCR 差异均有统计学意义。
脑瘫儿童的元音空间和言语清晰度降低。两组间的元音声学指标（VSA、VAI 和 FCR）存在显著差异，表明这三个指标对脑瘫儿童元音发音变化敏感，可作为评估脑瘫儿童因元音发音障碍导致的言语可懂度的方法，以及评估康复治疗效果的方法。
