Seifpanahi Sadegh, Bakhtiar Mehdi, Salmalian Tahmineh
Speech Therapy Department, Rehabilitation Faculty, and Research Center for Child and Adolescent Health, Zahedan University of Medical Sciences, Zahedan, Iran.
Folia Phoniatr Logop. 2011;63(2):72-6. doi: 10.1159/000316326. Epub 2010 Oct 7.
Previous studies have indicated significant differences in vocal parameters between children with Down syndrome and normal children. This study was performed to see whether there is a significant dissociation between normal adults and adults with Down syndrome in terms of some vocal parameters. The participants were 22 adults with Down syndrome and 22 normal adults matched for age and gender. We measured jitter, shimmer, fundamental frequency (F0), and maximum phonation time (MPT). The results showed a significantly higher F0 and a significantly lower jitter in the Down syndrome group compared to the control group, while the average amounts of MPT and shimmer were not different. Moreover, the shimmer and jitter of females in both groups were lower than those of males. These findings might be the result of a physiological retardation of the larynx rather than mental retardation in the Down syndrome population.
以往研究表明，唐氏综合征患儿与正常儿童在嗓音参数方面存在显著差异。本研究旨在观察正常成年人与唐氏综合征成年人在某些嗓音参数方面是否存在显著差异。研究对象为22名唐氏综合征成年人和22名年龄及性别匹配的正常成年人。我们测量了抖动、闪烁、基频（F0）和最长发声时间（MPT）。结果显示，与对照组相比，唐氏综合征组的F0显著更高，抖动显著更低，而MPT和闪烁的平均量没有差异。此外，两组中女性的闪烁和抖动均低于男性。这些发现可能是唐氏综合征人群喉部生理发育迟缓而非智力发育迟缓的结果。
